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Pengaruh taraf pH media logam alumunium terhadap viabilitas dan vigor tujuh varietas benih kedelai (Glycine max [L.] Merr.) Paul B Timotiwu; Agustiansyah Agustiansyah; erlinda citra dewi
Jurnal Agro Vol 9, No 2 (2022)
Publisher : Jurusan Agroteknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/19249

Benih kedelai peka terhadap lingkungan masam sehingga perlu dilakukan evaluasi pada media masam untuk mengetahui varietas benih yang toleran terhadap kondisi tersebut. Tujuan penelitian ini untuk mengetahui pengaruh kondisi pH media tumbuh serta respons tujuh varietas benih kedelai terhadap viabilitas dan vigor. Penelitian ini merupakan percobaan faktorial dalam Rancangan Kelompok Teracak Sempurna (RKTS). Faktor pertama adalah tujuh varietas kedelai yaitu Anjasmoro, Grobogan, Detap 1, Derap 1, Deja 1, Dega 1 dan Dena 1. Faktor kedua adalah tiga taraf pH pada larutan Al yaitu tanpa Al pH 7, larutan dengan konsentrasi AlCl3.6H2O 1 mM pH 6 – 7, dan larutan dengan konsentrasi AlCl3.6H2O 1 mM pH 4,5. Sehingga terdapat 21 perlakuan yang diulang tiga kali. Perbedaan antar perlakuan menggunakan Uji Lanjut Beda Nyata Terkecil (BNT) pada taraf nyata 5%. Hasil penelitian didapatkan bahwa media tanpa Al memiliki viabilitas dan vigor terbaik diikuti media Al pH 6 – 7 dan media Al pH 4,5. Varietas dengan vigor dan viabilitas terbaik diperoleh pada varietas Dega 1 tercermin dari variabel muncul radikula, daya berkecambah, indeks vigor, bobot kering tajuk dan akar, serta panjang akar. Viabilitas dan vigor benih kedelai tergantung dari varietas kedelai dan taraf pH media tumbuh.ABSTRACTSoybean seeds are sensitive to soil acidic environments so it is necessary to study effect of acidic media to determine varieties that are tolerant to acidic conditions. The study purposed to determine the effect of different pH conditions both without and with Al on the viability and vigor of different varieties of soybean seeds. This research was a factorial experiment in a Completely Randomized Block Design (RCBD). The first factor was seven soybean varieties, namely Anjasmoro, Grobogan, Detap 1, Derap 1, Deja 1, Dega 1, and Dena 1. The second factor was three pH levels in Al solution, namely without Al pH 7, solution with AlCl3.6H2O pH 6—7, and solution with AlCl3.6H2O pH 4.5. There were 21 treatments with three replications. The differences between treatments were analyzed using the Least Significant Difference (LSD) at a 5%. The results showed that media without Al had the best viability and vigor followed by Al pH 6—7 media and Al pH 4.5 media. Varieties with the best vigor and viability were obtained in the Dega 1 variety as reflected in the variables of radicle emergence, germination, vigor index, hypocotil, and root dry weight, and root length. Viability and vigor of soybean seeds depended on soybean varieties and the pH level of the growing media.

Konsorsium Bacillus spp. Untuk pengendalian penyakit rebah kecambah dan busuk batang (Sclerotium rolfsii) pada tanaman Cabai Yulmira Yanti; Hasmiandy Hamid; Yaherwandi Yaherwandi; Nurbailis Nurbailis
Jurnal Agro Vol 9, No 2 (2022)
Publisher : Jurusan Agroteknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/17954

Sclerotium rolfsii merupakan patogen tular tanah yang dapat menyebabkan kehilangan hasil hingga 75% pada tanaman cabai. Alternatif pengendalian ramah lingkungan bisa menggunakan agens hayati yaitu konsorsium bakteri endofit Bacillus spp. Penelitian bertujuan mendapatkan konsorsium Bacillus spp. terbaik untuk pengendalian rebah kecambah dan busuk pangkal batang yang disebabkan S. rolfsii pada tanaman cabai. Penelitian berupa eksperimen secara in vivo menggunakan Rancangan Acak Lengkap dengan tujuh perlakuan dan tiga ulangan yaitu : konsorsium A (B. toyonensis AGBE2.1 TL + B. thuringiensis SLBE2.3 BB), konsorsium B (B. toyonensis AGBE2.1 TL + B. cereus SLBE1.1 BB), konsorsium C (B. thuringiensis SLBE2.3 BB + B. cereus SLBE1.1 BB), konsorsium D (B. toyonensis AGBE2.1 TL + B. cereus SLBE1.1 BB + B. thuringiensis SLBE2.3 BB), Kontrol positif (tidak diberi S. rolfsii dan Bacillus spp.), Kontrol negatif (diinokulasikan S. rolfsii dan tidak diberi Bacillus spp.) dan Kontrol pembanding (fungisida Mankozeb). Peubah yang diamati yaitu perkembangan penyakit rebah kecambah dan busuk pangkal batang. Hasil penelitian menunjukkan konsorsium AGBE 2.1 TL+ SLBE 2.3 BB, konsorsium AGBE2.1 TL + SLBE1.1 BB dan konsorsium AGBE2.1 TL + SLBE1.1 BB + SLBE2.3 BB memiliki efektivitas 100% dalam mengendalikan penyakit rebah kecambah dan busuk pangkal batang.ABSTRACTSclerotium rolfsii is a soil-borne pathogen that can reduce yields up to 75% in chili plants. An alternative for environmentally friendly control can use biological agents, namely a consortium of endophytic bacteria Bacillus spp. The aim of the study was to obtain a consortium of Bacillus spp. best for controlling of damping off and stem rot caused by S. rolfsii in chili plants. The study was an in vivo experiment using a completely randomized design with seven treatments and three replications: consortium A (B. toyonensis AGBE2.1 TL + B. thuringiensis SLBE2.3 BB), consortium B (B. toyonensis AGBE2.1 TL + B. cereus SLBE1.1 BB), consortium C (B. thuringiensis SLBE2.3 BB + B. cereus SLBE1.1 BB), consortium D (B. toyonensis AGBE2.1 TL + B. cereus SLBE1.1 BB + B. thuringiensis SLBE2.3 BB), positive control (no S. rolfsii and Bacillus spp.), negative control (inoculated with S. rolfsii and no Bacillus spp.) and comparison control (Mankozeb fungicide). The results obtained that the consortium AGBE 2.1 TL+ SLBE 2.3 BB, the consortium AGBE2.1 TL + SLBE1 .1 BB and consortium AGBE2.1 TL + SLBE2.3 BB + B. cereus SLBE1.1 BB were 100% effective in suppressing developmental disease of damping off and stem rot caused by S. rolfsii.

Rhizoctonia mycorrhizae application and watering intervals on Dendrobium violaceoflavens seedling: a study of its effect on drought stress R Soelistijono; Daryanti Daryanti; Haryuni Haryuni; Irvansyah Cahya Perwita; Dian Rakhmawati
Jurnal Agro Vol 9, No 2 (2022)
Publisher : Jurusan Agroteknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/21123

Dendrobium violaceoflavens merupakan spesies asli Papua, habitat alaminya adalah daerah dengan curah hujan tinggi sehingga akan menjadi masalah bila dibudidayakan dan terlambat dalam penyiraman. Penelitian bertujuan mengetahui pengaruh aplikasi Rhizoctonia mikoriza dan interval penyiraman pada pertumbuhan vegetatif bibit D. violaceoflavens terhadap cekaman kekeringan (faktor abiotik). Penelitian menggunakan Rancangan Acak Lengkap (RAL) dengan 2 faktor dan 5 ulangan. Faktor pertama: dengan dan tanpa aplikasi Rhizoctonia mikoriza, faktor kedua adalah interval penyiraman 2 hari, 4 hari dan 6 hari. Hasil penelitian menunjukkan [1] aplikasi Rhizoctonia mikoriza berpengaruh nyata terhadap tinggi tanaman dengan nilai tertinggi 2,43 cm, jumlah daun 3,17 helai, dan jumlah akar 4,6 helai; [2] Interval penyiraman berpengaruh nyata terhadap tinggi tanaman dengan nilai tertinggi 2, 85 cm, jumlah daun 3,35 helai, jumlah akar 5,27 helai, dan bobot segar 1,23 g; [3] Interaksi pemberian Rhizoctonia mikoriza dan interval penyiraman 4 hari berpengaruh nyata pada panjang daun 1,90 cm dan jumlah daun 3,70 helai, dan pada akar terbentuk struktur peloton. Hasil terbaik diperoleh pada aplikasi Rhizoctonia mikoriza dan interval penyiraman 4 hari dalam penanggulangan cekaman kekeringan.ABSTRACTDendrobium violaceoflavens is a native species of Papua, its natural habitat is an area with high rainfall that will be a problem if it is cultivated and watering is delayed. The aim of this study was to determine the effect of Rhizoctonia mycorrhizae application and watering interval on vegetative growth of D. violaceoflavensseedlings on drought stress (abiotic factors).Research used a Completely Randomized Design (CRD) with 2 factors and 5 replications. First factor was with and without application of Rhizoctonia mycorrhizae, second factor was watering interval of 2 days, 4 days and 6 days. The result showed that [1] the application of Rhizoctonia mycorrhizae had a significant effect on plant height with the highest value of 2.43 cm, number of leaves 3.17 leaves, number of roots 4.6 leaves; [2] watering interval significantly affected on plant height with the highest value of 2.85 cm, number of leaves 3.35 sheets , number of roots 5.27, fresh weight of 1.23 g; [3] Interaction between Rhizoctonia mycorrhizae and watering interval of 4 days significantly affected on leaf length 1.90 cm, leaf number 3.70 sheets and a peloton structure was formed on the root. Best results were obtained on the application of Rhizoctonia mycorrhizae and watering interval of 4 days in overcoming the drought stress.

Penentuan umur panen beberapa kultivar mangga (Mangifera indica L.) Widya Astuti; Umi Trisnaningsih; Dodi Budirokhman
Jurnal Agro Vol 9, No 2 (2022)
Publisher : Jurusan Agroteknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/19684

Salah satu penyebab rendahnya kualitas buah mangga adalah umur panen yang tidak tepat. Penelitian ini bertujuan untuk mengetahui pengaruh umur panen terhadap kualitas beberapa kultivar mangga (Mangifera indica L.). Penelitian ini dilaksanakan mulai dari bulan Juli sampai November 2021 di Laboratorium Fakultas Pertanian Universitas Swadaya Gunung Jati. Metode penelitian yang digunakan yaitu metode eksperimen dengan Rancangan Acak Lengkap (RAL). Faktor yang diuji adalah kombinasi antara kultivar mangga (Gedong Gincu, Arumanis, Cengkir, dan Lalijiwo) dengan umur panen (60, 75, 90, 105, dan 120 hari setelah bunga mekar). Perlakuan diulang sebanyak 2 kali sehingga didapat 40 satuan percobaan. Variabel yang diamati adalah bobot segar buah, susut bobot buah, kekerasan buah, vitamin C, dan total padatan terlarut. Hasil penelitian menunjukkan bobot buah Arumanis dan Cengkir pada umur 90–120 Hari Setelah Bungan Mekar (HSBM) lebih tinggi dibanding kultivar lainnya. Susut bobot paling rendah terjadi pada Gedong Gincu dan Arumanis umur 120 HSBM sedangkan kandungan vitamin C dan total padatan terlarut yang tinggi diperoleh pada Gedong Gincu, Cengkir, dan Lalijiwo umur 120 hari setelah bunga mekar. Umur panen terbaik untuk semua kultivar adalah antara 90–120 HSBM.ABSTRACTOne of the causes of mango’s low quality is the improper harvesting age. This study aimed to determine the effect of harvest age on the quality of several mango cultivars (Mangifera indicaL.). This research was carried out from July to November 2021 at the Laboratory of Agriculture Faculty, Universitas Swadaya Gunung Jati. The research method used was the experimental method with a Completely Randomized Design (CRD). The factor tested was a combination of mango cultivars (Gedong Gincu, Arumanis, Cengkir, and Lalijiwo) and harvest age (60, 75, 90, 105, and 120 days after the flower blooms). The treatment was repeated 2 times so that 40 trials were obtained. The variables age observed were fresh fruit weight, fruit weight loss, fruit hardness, vitamin C, and total dissolved solids. The results showed that Arumanis and Cengkir fruit weights of 90-120 days after blooming (DAB) were higher than other cultivars. The lowest weight loss occurred in Gedong Gincu and Arumanis at 120 DAB, vitamin C content and total soluble solids were obtained in Gedong Gincu, Cengkir, and Lalijiwo at 120 DAB. The best harvest age for all cultivars was between 90 – 120 DAB.

Kemampuan Pseudomonas spp. Pendar fluor dan Bacillus spp. Dalam mengendalikan penyakit hawar pelepah jagung Endang Mugiastuti; Suprayogi Suprayogi; Nur Prihatiningsih; Loekas Soesanto
Jurnal Agro Vol 9, No 2 (2022)
Publisher : Jurusan Agroteknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/18819

Upaya meningkatkan produksi jagung di Indonesia seringkali mengalami beberapa kendala, di antaranya adanya infeksi Rhizoctonia solani Kühn, penyebab penyakit hawar pelepah daun. Pengendalian hayati menggunakan bakteri antagonis indigenous jagung diharapkan dapat mengendalikan penyakit hawar pelepah jagung. Penelitian bertujuan untuk mengetahui kemampuan bakteri antagonis Pseudomonas spp. pendar fluor dan Bacillus spp. dalam mengendalikan penyakit hawar pelepah dan memacu pertumbuhan tanaman pada tanaman jagung. Penelitian menggunakan Rancangan Acak Kelompok Lengkap dengan 8 perlakuan meliputi Pseudomonas spp. pendar fluor BB.R1, Pseudomonas spp. pendar fluor PPD.B5, Bacillus spp. BB.R3, Bacillus spp. BK.R5, Bacillus spp. BB.B4, Bacillus spp. BK.A1, serta fungisida (fluopikolid 6% + propineb 67%) dan kontrol. Variabel yang diamati meliputi masa inkubasi, intensitas penyakit, AUDPC, jumlah daun, tinggi tanaman, bobot tanaman segar dan kering, bobot akar segar dan kering, serta panjang akar. Hasil penelitian menunjukkan bakteri antagonis asal rizosfer dan endofit mampu menekan penyakit hawar pelepah jagung, dengan menurunkan intensitas penyakit sebesar 42,87-85,69% dan AUDPC 53,19-87,23%. Pseudomonas spp. pendar fluor BB.R1, Bacillus spp. BB.R3 serta Bacillus spp. BB.B4 mampu meningkatkan beberapa komponen pertumbuhan tanaman jagung antara 9,5-40,49%. Bakteri Pseudomonas spp. pendar fluor BB.R1, Bacillus spp. BB.R3 serta Bacillus spp. BB.B4 memiliki potensi untuk dimanfaatkan sebagai pengendali penyakit hawar pelepah jagung serta mampu meningkatkan pertumbuhan tanaman jagung. ABSTRACTThe efforts to increase maize production in Indonesia experienced several constraints, including the infection of Rhizoctonia solani Kuhn, the cause of sheath blight disease. Biological control, with antagonistic bacteria from indigenous maize, can be used to control maize sheath blight disease. This study was aimed to determine the ability of fluorescent Pseudomonas and Bacillus spp. to control sheath blight and promote plant growth in maize. The study used a randomized complete block design with eight treatments, including the fluorescent Pseudomonas BB.R1, fluorescent Pseudomonas PPD.B5, Bacillus spp. BB.R3, Bacillus spp. BK. R5, Bacillus spp. BB.B4, Bacillus spp. BK.A1, fungicides (fluopicolide 6% + propineb 67%) and controls. Variables observed including incubation period, disease intensity, AUDPC, number of leaves, plant height, fresh and dry plant weight, fresh and dry root weight, and root length. The results showed that antagonist bacteria could suppress maize sheath blight by reducing disease intensity from 42.87 to 85.69% and AUDPC from 53.19 to 87.23%. Fluorescent Pseudomonas BB.R1, Bacillus spp. BB.R3, and Bacillus spp. BB.B4 increased several components of maize growth from 9.50 to 40.49 %. The fluorescent Pseudomonas spp. BB.R1, Bacillus spp. BB.R3 and Bacillus spp. BB.B4 potentially utilized to control sheath blight disease and promote plant growth in maize.

Efektifitas penggunaan beberapa indeks toleransi untuk menyeleksi jagung toleran nitrogen rendah Slamet Bambang Priyanto; Roy Efendi; Ahmad Muliadi
Jurnal Agro Vol 9, No 2 (2022)
Publisher : Jurusan Agroteknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/20291

Keakuratan dalam seleksi jagung hibrida toleran N rendah dapat ditingkatkan dengan penggunaan beberapa indeks seleksi secara sekaligus. Penelitian ini bertujuan mengidentifikasi indeks toleransi yang sesuai untuk seleksi jagung hibrida toleran N rendah serta memilih jagung hibrida toleran N rendah. Penelitian dilaksanakan di IP2TP Bajeng Balai Penelitian Tanaman Serealia Kabupaten Gowa bulan April sampai dengan September 2021. Sebanyak 8 hibrida dan 2 varietas pembanding ditanam pada rancangan tersarang tiga ulangan. Genotipe tersarang pada taraf pupuk N. Taraf pupuk N meliputi 100 kg N ha-1 dan 200 kg N ha-1. Indeks toleransi meliputi Tolerance (TOL), Mean Productivity (MP), Geometric Mean Productivity (GMP), Harmonic Mean (HM), Stress Tolerant Index (STI), Relative Tolerant Index (RTI), Stress Susceptibility Index (SSI), Yield Index (YI), Stress Relative Index (SI), Yield Stability Index (YSI), Stress Susceptibility Percentage Index (SSPI). Hasil penelitian menunjukkan bahwa indeks toleransi menunjukkan bahwa MP, GMP, HM dan STI merupakan yang paling sesuai untuk menyeleksi hibrida toleran N rendah. Hibrida HLN 02 dan HLN 06 merupakan hibrida yang toleran terhadap N rendah, sedangkan Hibrida HLN 03 dan HLN 07 dan ADV 777 termasuk peka. Berdasarkan hasil biji pada pemupukan 100 kg N ha-1 dan 200 kg N ha-1 dan indeks toleransi serta analisis kluster.ABSTRACTLow N tolerant hybrid maize selection accuracy can be increased by using several selection indices simultaneously. This study's objective was to identify the proper tolerance index for low N tolerant hybrid maize selection and to determine the low N tolerant hybrid maize. The research was conducted at IP2TP Bajeng Indonesian Cereal Crop Institute Gowa Regency from April to September 2021. Eight promising hybrid and two check varieties were planted in a nested design with three replications. The genotypes were nested at the N fertilizer level. The N fertilizer levels were 100 kg N ha-1 and 200 kg N ha-1. The tolerance index used was Tolerance (TOL), Mean Productivity (MP), Geometric Mean Productivity (GMP), Harmonic Mean (HM), Stress Tolerant Index (STI), Relative Tolerant Index (RTI), Stress Susceptibility Index (SSI), Yield Index (YI), Stress Relative Index (SI), Yield Stability Index (YSI), Stress Susceptibility Percentage Index (SSPI). The results showed that tolerance index MP, GMP, HM, and STI were the most suitable for electing low N tolerant hybrids maize. hybrids HLN 02 and HLN 06 were low N tolerant; meanwhile, HLN 03 and HLN 07 and ADV 777 were susceptible based on yields at 100 kg N ha-1 and 200 kg N ha-1 fertilization, tolerant indexes, and clustering.

Efektifitas Azotobacter sp. Dan Pseudomonas sp. Pada tanaman sorgum (Shorgum bicolor L.) dalam proses fitoremediasi limbah minyak bumi Pujawati Suryatmana; Mieke Rochimi Setiawati; Nadia Nuraniya Kamaluddin; Diyan Herdiyantoro
Jurnal Agro Vol 9, No 2 (2022)
Publisher : Jurusan Agroteknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/20146

Interaksi sinergis antara tanaman-bakteri dapat digunakan untuk meningkatkan kinerja fitoremediasi tanah yang terkontaminasi hidrokarbon (HC). Penelitian bertujuan untuk karakterisasi plant growth promoting rhizobacteria: Azotobacter sp. dan Pseudomonas sp. dalam kinerja fitoremediasi limbah minyak bumi menggunakan tanaman sorgum (Sorghum bicolor L.). Penelitian menggunakan rancangan acak kelompok faktorial (RAK-Faktorial) terdiri dari inokulasi Azotobacter sp. sebanyak 0%, 1%, 2%, dan 3% per konsentrasi total petroleum hydrocarbon (TPH), dan inokulasi Pseudomonas sp 0%, 1%, 2%, dan 3% per TPH. Hasil penelitian menunjukkan bahwa tidak ada interaksi antara inokulasi Azotobacter sp. dan Pseudomonas sp. terhadap seluruh variabel respon. Namun, efek mandiri terlihat pada efisiensi biodegradasi HC, yaitu inokulasi Azotobacter sp dosis 3% berbeda secara signifikan dengan kontrol pada fase ke 4 minggu setelah tanam (MST), tetapi tidak signifikan pada fase 14 MST. Inokulasi Pseudomonas sp. tidak memberikan efek yang signifikan antar perlakuan terhadap efisiensi biodegradasi HC pada dua periode pengamatan. Populasi Azotobacter sp. dan Pseudomonas sp. menurun pada periode 4 MST, selanjutnya meningkat pada periode 14 MST. Pertumbuhan tanaman sorgum mengalami retardasi selama 14 MST. Residu hidrokarbon terakumulasi lebih tinggi di bagian akar daripada di bagian tajuk tanaman. Azotobacter sp. dan Pseudomonas sp. berperan sebagai binding agent yang dapat menghambat serapan hidrokarbon oleh akar sorgum.ABSTRACTThe synergism interaction between plant-bacteria can be used to improve performance of phytoremediation hydrocarbon (HC) contaminated soil. The study aimed to characterize Azotobacter sp. and Pseudomonas sp. in petroleum phytoremediation performance using sorghum (Sorghum bicolor L). The research used a randomized block design with two factors: Azotobactersp. inoculation 0%, 1%, 2% and 3% per total petroleum hydrocarbon (TPH) concetration, and Pseudomonas sp inoculation: 0%, 1%, 2% and 3% per TPH concentration. The results showed there was no interaction between Azotobacter sp. and Pseudomonas sp. inoculation to each response variable. The independent effect of 3% Azotobacter sp. to biodegradation HC efficiency was significantly different from the control at phase 4 weeks after planting (WAP), but not significantly different at phase 14 WAP. Pseudomonas sp. effect did not show a significantly different between treatments on the hydrocarbon biodegradation efficiency in the two observation periods. Azotobacter sp. and Pseudomonas sp. population decreased at period 4 WAP, then increased at period 14 WAP. The Sorghum growth was retarded during 14 WAP. Hydrocarbon residues accumulated higher in the roots than in shoot. Azotobacter sp. and Pseudomonas sp. act as a binding agent that can inhibit the hydrocarbons uptake by sorghum roots.

Respons tanaman kopi liberika bermikoriza di lahan gambut terhadap aplikasi pupuk anorganik Elis Kartika; Made Deviani Duaja; Gusniwati Gusniwati
Jurnal Agro Vol 9, No 2 (2022)
Publisher : Jurusan Agroteknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/21421

Aplikasi pupuk anorganik secara kontinyu dengan dosis tinggi berdampak negatif terhadap kerusakan tanah dan lingkungan lainnya. Pemakaian pupuk hayati mikoriza merupakan salah satu upaya untuk mengatasi dampak negatif tersebut. Penelitian yang bertujuan untuk mendapatkan dosis pupuk anorganik terbaik dalam meningkatkan pertumbuhan tanaman kopi liberika bermikoriza di lahan gambut, dilakukan menggunakan Rancangan Acak Kelompok satu faktor 6 perlakuan, yaitu tanpa pupuk hayati mikoriza + pupuk anorganik 100%, pupuk hayati mikoriza + tanpa pupuk anorganik, pupuk hayati mikoriza + 25% pupuk anorganik, pupuk hayati mikoriza + 50% pupuk anorganik, pupuk hayati mikoriza + 75% pupuK anorganik, serta pupuk hayati mikoriza + 100% pupuk anorganik dengan dosis rekomendasi yaitu 50 g Urea, 40 g SP-36, 40 g KCl dan 15 g Kisserit per tanaman. Isolat mikoriza yang digunakan berupa isolat gabungan Glomus sp-1a dan Glomus sp-3c sebanyak 10 g per tanaman. Peubah yang diamati adalah pertambahan tinggi tanaman, pertambahan diameter batang, pertambahan jumlah daun dan pertambahan jumlah cabang serta kolonisasi mikoriza. Hasil penelitian menunjukkan bahwa aplikasi pupuk hayati mikoriza 10 g per tanaman dan 50% pupuk anorganik merupakan kombinasi terbaik dalam meningkatkan pertumbuhan kopi liberika di lahan gambut. Pupuk hayati mikoriza mampu menggantikan dan menghemat pemakaian pupuk anorganik sebesar 50%. ABSTRACTContinuous application of inorganic fertilizers in high doses can harm the soil and causes other environmental damage. Using mycorrhizal biofertilizers is one of the efforts to overcome the adverse effects of these inorganic fertilizers. The study aimed to obtain the best dose of inorganic fertilizer in increasing the growth of mycorrhizal liberika coffee plants on peatlands and was designed in a randomized block experiment. The treatment was the application of mycorrhizal biofertilizers and inorganic fertilizers according to recommendations i.e: without mycorrhizal biofertilizers +100% inorganic fertilizers; mycorrhizal biofertilizers+ no inorganic fertilizers; mycorrhizal biofertilizer+25% inorganic fertilizer; mycorrhizal biofertilizer + 50% inorganic fertilizer; mycorrhizal biofertilizer + 75% inorganic fertilizer; mycorrhizal biofertilizer + 100% inorganic fertilizer (as recommended doses of 50 g Urea, 40 g SP-36, 40 g KCl and 15 g Kisserit per plant). The mycorrhizal isolates used were a combination of Glomus sp-1a and Glomus sp-3c of 10 g per plant. The variables observed were the increase in plant height, stem diameter, number of leaves, number of branches, and mycorrhizal colonization. The results showed that applying 10 g per plant of mycorrhizal biofertilizer and 50% of inorganic fertilizer was the best combination for increasing the growth of Liberica coffee in peatlands. Mycorrhizal biofertilizers can replace and reduce the use of inorganic fertilizers by 50%.

Water quality and water spinach productivity in aquaponic systems using fine bubbles (FBS) zahidah hasan; Yuli Andriani; Drian Alif Anando; Sofiya Hasani; Rusky I Pratama
Jurnal Agro Vol 9, No 2 (2022)
Publisher : Jurusan Agroteknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/21491

Fine bubbles (FBs) merupakan teknologi baru dalam sistem akuaponik yang diharapkan mampu meningkatkan produksi ikan dan tanaman. Penelitian ini bertujuan untuk menentukan pemberian tekanan fine bubbles (FBs) yang dapat meningkatkan kualitas air dan produktivitas kangkung dalam sistem akuaponik. Penelitian dilaksanakan pada bulan Januari – Maret 2022 di Green House Ciparanje Fakultas Perikanan dan Ilmu Kelautan Universitas Padjadjaran, Jatinangor. Penelitian ini menggunakan metode eksperimental Rancangan Acak Lengkap (RAL) dengan empat perlakuan dan tiga ulangan. Perlakuan yang digunakan adalah pemberian tekanan FBs masing-masing 0 atm (A), 5,25 atm (B), 5,5 atm (C), 5,75 atm (D). Parameter kualitas air yang diukur terdiri atas parameter fisika (suhu) dan kimia (oksigen terlarut, pH, amonia, dan nitrat). Hasil penelitian menunjukkan pemberian tekanan FBs 5,75 atm menghasilkan suhu berkisar 24,4℃ - 26,5℃, kandungan oksigen terlarut sebesar 7,83 mg, pH 6,98 – 8,07, konsentrasi amonia 0,002 mg L-1, yang berpengaruh pada pertumbuhan ikan yang baik serta konsentrasi nitrat 0,316 mg L-1 yang berpengaruh pada produktivitas tanaman yang lebih tinggi, menghasilkan pertumbuhan tinggi tanaman 128,83 cm, bobot tanaman 140,60 g, dan jumlah daun 284 helai.ABSTRACTThe fine bubbles (FBs) is a new technology in aquaponic system that is expected to improve the fish and plant productivity. This study aimed to determine the application of fine bubbles pressure in improving water quality and water spinach in an aquaponic system. The research was conducted from January to March 2022 at Ciparanje Green House, Faculty of Fisheries and Marine Sciences, Universitas Padjadjaran, Jatinangor. This study used an experimental method of Completely Randomized Design (CRD) with four treatments and three replications. The treatments used were FBs pressure of 0 atm (A), 5.25 atm (B), 5.5 atm (C), 5.75 atm (D). The water quality parameters measured consisted of physical (temperature) and chemical (dissolved oxygen, pH, ammonia, and nitrate) parameters. The results showed that the pressure of FBs 5.75 atm generated temperatures ranging from 24.4oC - 26.5 oC, dissolved oxygen content of 7.83 mg L-1, pH 6.98 – 8.07, ammonia concentration 0.002 mg L-1 which affected on good fish growth and nitrate concentration 0.316 mg L-1 which affected higher plant productivity, resulting plant height of 128.83 cm, a plant weight of 140.60 g, and the number of leaves of 284 leaves.

Pengaruh BA dan NAA terhadap multiplikasi tunas ubi kayu secara in vitro fitri yelli; Ardian Ardian; Setyo Dwi Utomo
Jurnal Agro Vol 9, No 2 (2022)
Publisher : Jurusan Agroteknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/19263

Ubi kayu varietas UJ-3, klon BW-1 dan Unila UK-1 banyak ditanam khususnya di Lampung. Untuk itu diperlukan bibit dalam jumlah besar yang dapat dilakukan secara in vitro. Penelitian ini bertujuan untuk mengevaluasi pengaruh BA dan NAA terhadap induksi dan multiplikasi tunas ubi kayu secara in vitro. Penelitian dilakukan menggunakan rancangan acak lengkap (RAL) dengan dua faktor, yaitu : (1) Varietas/klon yang terdiri atas UJ-3 (K1), BW-1 (K2) dan Unila UK-1 (K3), dan (2) Media yang terdiri atas media Murashige and Skoog (MS) tanpa zat pengatur tumbuh (M1), MS + BA 0,1 mg L-1 (M2), MS + BA 0,1 mg L-1 + NAA 0,05 mg L-1 (M3), MS + BA 0,3 mg L-1 + NAA 0,05 mg L-1 (M4), MS + BA 0,5 mg L-1 + NAA 0,05 mg L-1 (M5). Setiap perlakuan diulang sebanyak empat kali. Hasil menunjukkan bahwa tunas dari varietas/klon ubi kayu dapat terinduksi pada semua media perlakuan. Rata-rata jumlah tunas tertinggi (1,25 tunas) dihasilkan pada media M4 untuk klon Unila UK-1, jumlah buku paling tinggi (8 buku) dihasilkan klon BW-1 pada media M3 dan M4, jumlah daun hijau tertinggi (6 helai) pada media M3. Klon BW-1 juga menghasilkan jumlah daun gugur tertinggi (4,5 helai) pada media M4. ABSTRACTCassava UJ-3, BW-1, and Unila UK-1 are widely planted especially in Lampung. Therefore, it needs a high number of planting materials that can be done through tissue culture. This study aimed to determine the effect of BA and NAA on in vitro of cassava shoot induction and multiplication. The study used a completely randomized design with two factors, namely: (1) Variety/clone which consisted of UJ-3 (K1), BW-1 (K2), and Unila UK-1 (K3), and (2) Medium which consisted of MS without growth regulators (M1), MS + BA 0,1 mg L-1 (M2), MS + BA 0,1 mg L-1 + NAA 0,05 mg L-1 (M3), MS + BA 0,3 mg L-1 + NAA 0,05 mg L-1 (M4) and MS + BA 0,5 mg L-1 + NAA 0,05 mg L-1 (M5). Each treatment was repeated four times. Results showed that shoots from all genotypes could be induced in all treatment mediums. The highest shoot number (1.25 shoots) was produced by Unila UK-1 on M4 medium. The BW-1 clone showed the best result in the node number (8 nodes) on the M3 and M4 medium, the green leaves number (6 sheets) on the M3 medium, and produced a high deciduous leaves number (4.5 sheets) on the M4 medium.

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