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Aplikasi pupuk hayati ameliorant, dan pupuk NPK terhadap N total, P tersedia serta pertumbuhan dan hasil jagung pada inceptisols Mieke Rochimi Setiawati; Lia Nur Linda; Nadia Nuraniya Kamaluddin; Pujawati Suryatmana; Tualar Simarmata
Jurnal Agro Vol 8, No 2 (2021)
Publisher : Jurusan Agroteknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/15121

Inceptisols umumnya memiliki tingkat kesuburan tanah rendah sampai sedang. Upaya peningkatan ketersediaan hara tanah Inceptisol dengan pupuk anorganik NPK perlu diimbangi dengan aplikasi pupuk hayati dan amelioran organik. Percobaan ini bertujuan untuk mengurangi dosis pupuk NPK dengan menggunakan pupuk hayati dan amelioran organik serta meningkatkan hasil tanaman jagung. Percobaan dilakukan di Pasir Banteng, Kabupaten Sumedang. Penelitian menggunakan RAK faktorial. Pupuk hayati dengan amelioran organik sebagai faktor pertama sebanyak empat taraf: tanpa pupuk hayati dan amelioran (kontrol), diberi pupuk hayati, amelioran organik, dan gabungan keduanya. Faktor kedua yaitu dosis pupuk NPK empat taraf: 100%, 80%, 60%, 40% NPK dosis anjuran. Dilakukan tiga kali ulangan. Hasil penelitian menunjukkan terdapat interaksi antara pupuk hayati, amelioran organik, dengan pupuk NPK terhadap tinggi tanaman, N-total tanah, bobot tongkol berkelobot dan tanpa kelobot. Pemberian pupuk hayati dan amelioran disertai pupuk NPK 100% dan yang tanpa diberi amelioran menghasilkan bobot tongkol tanpa kelobot sebesar 1.089 g dan 1.064 g per tanaman. Pemberian pupuk hayati dengan amelioran dan pemberian pupuk NPK 100% menghasilkan bobot pipilan per tanaman 526,08 g dan 539,08 g. Aplikasi pupuk hayati dan amelioran organik belum mampu mengurangi dosis penggunaan pupuk NPK pada Inceptisols asal Pasir Banteng. Inceptisols generally have low to moderate soil fertility. The effort to increase the nutrients availability in Inceptisol through the application of NPK fertilizers need to be balanced with biofertilizers and organic ameliorants. This experiment aimed to reduce the dose of NPK fertilizer by using biofertilizers and organic ameliorants and to increase maizeyields. The experiment was conducted in Pasir Banteng, Sumedang Regency. The factorial RBD was used. The biofertilizer with organic ameliorant as the first factor: no biofertilizer and no ameliorant (control), biofertilizer, organic ameliorant, and combination of both. The second factor was dose of NPK fertilizer: 100%, 80%, 60%, 40% of recommended NPK dose. It was repeated three times. The results showed that there was interaction between biofertilizer, organic ameliorants, with NPK fertilizers on plant height, N-total soil, weight of cobs with and without husk. The application of biofertilizer and ameliorant with 100% NPK fertilizer and without ameliorant were 1,089 g and 1,064 g of cobs without husks, respectively. The application of biofertilizer with ameliorant and 100% NPK fertilizer had a grain weight of 526.08 g and 539.08 g, respectively. The application of biofertilizers and organic ameliorants has not been able to reduce the dose of NPK fertilizer on Inceptisols from Pasir Banteng.

Komposisi Gulma pada Berbagai Jarak Tanam Padi Secara IPAT–BO dan Konvensional Merry Antralina; Yuyun Yuwariah; Tualar Simarmata
Jurnal Agro Vol 1, No 1 (2014)
Publisher : Jurusan Agroteknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/77

Penelitian yang bertujuan mempelajari komposisi gulma tanaman padi sawah pada sistem bertanam secara IPAT-BO dan konvensional telah dilaksanakan pada bulan April 2013 sampai bulan Juli 2013 di Kelompok Tani Sadang Mukti, Kampung Sadang Sari, Kabupaten Bandung Jawa Barat yang terletak pada ketinggian 668 m di atas permukaan laut. Penelitian menggunakan metode eksperimen, dengan Rancangan Petak Terpisah, 3 kali ulangan, sebagai petak utama yaitu faktor metode pengairan (M), yang terdiri dari pengairan secara IPAT-BO dan konvensional, sedangkan anak petak adalah jarak tanam (J), yang terdiri dari : 30 x 35 cm, 30 x 25 cm, 35 x 35 cm,dan 30 x 30 cm. Hasil penelitian menunjukkan bahwa terjadi interaksi antara metode pengairan dan jarak tanam terhadap nilai jumlah dominasi gulma, dan bobot kering gulma.Gulma yang dominan pada perlakuan IPAT-BO lebih banyak dibanding perlakuan konvensional, sedangkan bobot kering gulma terberat terjadi pada metode IPAT-BO dengan jarak tanam 35 cm x 35 cm. The research was aimed to assess the effect of different plant spacing to weed composition and lowland rice yield in SOBARI and conventional irrigation methods. The experiment had been conducted in Farmers Groups Sadang Mukti, Sadang Sari Village, Bandung District, West Java at 668 m above sea level, from April 2013 to July 2013. It was arranged in split plot design, consisted of two factor, irrigation methods factor (M) as main plot, namely: irrigation methods in SOBARI (m1) and conventional (m2),subplot was plant spacing factor (J), which consisted of four levels of factors, namely: 30 x 35 cm, 30 x 25 cm, 35 x 35 cm, and 30 x 30 cm. The results showed that there was interaction between irrigation method and plant spacing on the value of domination number of weeds, and weed dry weight. Dominantweeds in SOBARI method were more than conventional treatment, weed dry weight in SOBARI method with spacing of 35 cm x 35 cm had greater than the other treatments.

Effects of soil ameliorant composition on soil properties and chili (Capsicum annuum L.) yield in inceptisols Jatinangor Baiq Azizah Haryantini; Yosef Situmorang; Anne Nurbaity; Tualar Simarmata
Jurnal AGRO Vol 10, No 1 (2023)
Publisher : Jurusan Agroteknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/24389

Inorganic fertilizers have an important role in improving the productivity of chili plants, but continuous use will cause soil quality to decline. The use of ameliorant is expected to improve soil quality. This experiment was aimed to find out the best effect of ameliorant composition and dose on organic-C, soil pH, population of phosphate solubilizing bacteria, and yield of chili plant in Inceptisols Jatinangor. The research was conducted in plastic house of Agricultural Faculty of Padjadjaran University on January – Mei 2018. The design experiment was factorial randomizedblock design which consisted of two factors with three replications. The first factor was ameliorant composition consisting of four levels (a1 = 80% cow manure + 20% Biochar Coconut Shell ; a2 = 95% Composition a1 + 5% Dolomite and Guano ; a3 = 90% Composition a1 + 10% dolomite and guano; a4 = 85% composition a1 + 15% dolomite and guano), and the second factor was ameliorant dose consisting of four levels (t0 = 0 t ha-1 ; t1 = 2 t ha-1 ; t2 = 4 t ha-1 ; t3= 6 t ha-1). The results showed that there were no interaction between composition and dose of ameliorant to organic-C, soil pH, population of phosphate solubilizing bacteria, and yield of chili on Inceptisols Jatinangor. The 4 t ha-1 of ameliorant dose increased organic-C, soil pH, population of phosphate solubilizing bacteria, and yield of chili plant by 44,9%.ABSTRAK Pupuk anorganik meningkatkan produktivitas tanaman cabai, namun penggunaan terus menerus akan menyebabkan kualitas tanah menurun. Penggunaan amelioran diharapkan dapat memperbaiki kualitas tanah. Penelitian ini bertujuan untuk mengetahui pengaruh komposisi dan dosis amelioran terbaik terhadap C organik, pH tanah, populasi bakteri pelarut fosfat, dan hasil tanaman cabai di Inceptisols Jatinangor. Penelitian dilakukan di rumah plastik Fakultas Pertanian Universitas Padjadjaran bulan Januari – Mei 2018 menggunakan rancangan acak kelompok faktorial terdiri dari dua faktor dengan tiga ulangan. Faktor pertama adalah komposisi amelioran yang terdiri dari empat taraf (a1 = 80% kotoran sapi + 20% biochar batok kelapa; a2 = 95% komposisi a1 + 5% dolomit dan guano; a3 = 90% komposisi a1 + 10% dolomit dan guano; a4 = 85% komposisi a1 + 15% dolomit dan guano), dan faktor kedua adalah dosis amelioran yang terdiri dari empat taraf (t0 = 0 t ha-1 ; t1 = 2 t ha-1 ; t2 = 4 t ha-1 ; t3= 6 t ha-1). Hasil penelitian menunjukkan bahwa tidak terdapat interaksi antara komposisi dan dosis amelioran terhadap C-organik, pH tanah, populasi BPF, dan hasil cabai pada Inceptisols Jatinangor. Dosis amelioran 4 t ha-1 meningkatkan C-organik, pH tanah, populasi BPF, dan meningkatkan hasil tanaman cabai sebesar 44,9%.

Enhancing phosphate availability and growth of C. asiatica in andisols through phosphate-solubilizing bacteria application Betty Natalie Fitriatin; Andriana Kartikawati; Tualar Simarmata; Emma Trinurani Sofyan
Jurnal AGRO Vol 10, No 2 (2023)
Publisher : Jurusan Agroteknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/26315

Centella asiatica is a medicinal plant containing asiaticoside bioactive, this is considerably higher if grown in the highlands generally on Andisols. Conversely, phosphorus was deficient in Andisol soils. The experiment aimed to study effect of phosphate solubilizing bacteria (PSB) isolates from the rhizosphere of C. asiatica which can dissolve P, produce plant growth promoters, increase growth of C. asiatica and fertilization efficiency. The research was done at Soil Biology Laboratory, Agriculture Faculty, Universitas Padjadjaran and at the experimental field of Agricultural Technology Research and Assessment Installation Manoko, Lembang District, West Java, Indonesia. The research used a factorial randomized block design with three replications and two factors. The first factor were application techniques: control, root soaking, and soil watering. The second factor were dose of NPK fertilizer and soil conditioner: control, P fertilizer dose of 100%, soil conditioner, P fertilizer dose 75% + soil conditioner, and P fertilizer dose of 100% + soil conditioner. Three superior isolates were isolated from C. asiatica rhizosphere and have been identified as: Paraburkholderia caribensis strain MNL-133, Paraburkholderia caribensis strain DSM 13236, and Pseudomonas aeruginosa strain K19PSE24. The results showed that the application of PSB combined with a dose of P fertilizer and soil conditioner on C. asiatica affected the soil P available, the number of leaves, the number of stolons and plant dry weight.ABSTRAKPegagan (Centella asiatica) salah satu komoditas tanaman obat yang memiliki kandungan bioaktif asiatikosida. Asiatikosida lebih tinggi jika ditanam di dataran tinggi umumnya ordo Andisols. Defisiensi hara fosfor salah satu kendala budi daya pada tanah Andisol. Penelitian ini bertujuan mengkaji pengaruh bakteri pelarut fosfat (BPF) unggul yang diisolasi dari roofer tanaman pegagan yang mampu melarutkan P dan menghasilkan pemacu pertumbuhan tanaman pengaruhnya terhadap peningkatan pertumbuhan tanaman pegagan dan efisiensi pemupukan. Penelitian dilaksanakan di Laboratorium Biologi Tanah, Fakultas Pertanian UNPAD dan di kebun percobaan Instalasi Penelitian dan Pengkajian Teknologi Pertanian (IP2TP) Manoko, Lembang menggunakan Rancangan Acak Kelompok Faktorial dengan tiga ulangan. Faktor pertama adalah teknik aplikasi BPF: kontrol; perendaman akar; penyiraman pada tanah. Faktor kedua yaitu dosis pupuk NPK dan pembenah tanah, yaitu perlakuan kontrol, pupuk P dosis 100%, pembenah tanah, pupuk P dosis 75% + pembenah tanah, dan pupuk P dosis 100% + pembenah tanah. Isolasi BPF dari rhizosfer pegagan menghasilkan isolat unggul yaitu Paraburkholderia caribensis strain MNL-133, Paraburkholderia caribensis strain DSM 13236, and Pseudomonas aeruginosa strain K19PSE24. Hasil menunjukkan pemberian BPF dikombinasikan dengan dosis pupuk P dan pembenah tanah pada tanaman pegagan memberikan pengaruh terhadap P tersedia, jumlah daun, jumlah stolon, dan berat kering tanaman.

The influence of ameliorant, nutrient solution and bioferilizer on soil P, plant P uptake, and yield of red chili. Fitriatin, Betty Natalie; Dupa, Putri Siska Ekayanti; Fauziah, Nicky Oktav; Wong, Mui-Yun; Simarmata, Tualar
Jurnal AGRO Vol 11, No 1 (2024)
Publisher : Jurusan Agroteknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/35886

The productivity and quality of red chili are greatly influenced by soil conditions and the availability of nutrients. Nutrients play a critical role in the growth and development of red chili plants. This experiment aimed to determine the combination of ameliorant, nutrient solution, and biofertilizer on the population of phosphate-solubilizing bacteria (PSB), available P, P-uptake, and red chili production in Inceptisols. The experiment was conducted at the experimental field of the Faculty of Agriculture, Universitas Padjadjaran. The experiment used a Randomized Complete Block Design (RCBD) with seven treatments and four replications, consisting of control, NPK, and nutrient solution (NS) with doses of 0, 6, and 12 kg ha-1 biofertilizers. The dosage used in a single application was 15 g plant-1 of NPK fertilizer and 300 mL plant-1 of nutrient solution. The base fertilizer consisted of manure in the control treatment and an ameliorant in other treatments at a dose of 4 t ha-1. The results showed that the combination of ameliorant + NPK + 6 kg ha-1 biofertilizer increased PSB population (4.93 x 106 CFU mL-1), available P (15.4 ppm), and P-uptake (0.74 g plant-1). Meanwhile, the combination of ameliorant + nutrient solution + 6 kg ha-1 biofertilizer increased fruit diameter (15 mm), and length of red chili (17.3 cm). Correlation analysis indicated positive correlation between red chili production with stem diameter and fruit length, but a negative correlation with P-uptake. Regression analysis indicated that stem diameter and PSB population had the most dominant effect on red chili yield. Produktivitas dan kualitas cabai merah sangat dipengaruhi oleh kondisi tanah dan ketersediaan unsur hara. Unsur hara memegang peranan penting dalam pertumbuhan dan perkembangan tanaman cabai merah. Percobaan ini bertujuan untuk mengetahui kombinasi amelioran, larutan hara dan biofertilizer terhadap populasi bakteri pelarut fosfat (BPF), P tersedia, serapan P, dan produksi cabai merah pada tanah Inceptisols. Percobaan dilaksanakan di lahan percobaan Fakultas Pertanian Universitas Padjadjaran. Percobaan menggunakan Rancangan Acak Kelompok Lengkap (RAKL) dengan tujuh perlakuan dan empat kali ulangan, terdiri dari: kontrol, NPK dan Larutan Hara dengan dosis 0, 6, dan 12 kg ha-1 pupuk hayati. Dosis yang digunakan dalam satu kali aplikasi adalah pupuk NPK 15 g tanaman-1 dan larutan hara 300 mL tanaman-1. Pupuk dasar berupa pupuk kandang pada perlakuan kontrol dan amelioran pada perlakuan lain dengan dosis 4 t ha-1. Hasil penelitian menunjukkan bahwa kombinasi amelioran + NPK + 6 kg ha-1 pupuk hayati mampu meningkatkan populasi BPF (4,93 x 106 CFU mL-1), P tersedia (15,4 ppm), dan serapan P (0,74 g tanaman-1). Sementara itu, kombinasi amelioran + larutan hara + 6 kg ha-1 pupuk hayati mampu meningkatkan diameter buah (15 mm), dan panjang cabai merah (17,3 cm). Analisis korelasi menunjukkan korelasi positif antara produksi cabai merah dengan diameter batang dan panjang buah, tetapi korelasi negatif dengan serapan P. Analisis regresi menunjukkan bahwa diameter batang dan populasi BPF memiliki pengaruh paling dominan terhadap hasil cabai merah.

Population of P-solubilizer bacteria, available P, P Uptake and chili yield affected by bioameliorants and nutrient Fitriatin, Betty Natalie; Dita, Limbong Agatha Dita; Fauziah, Nicky Oktav Fauziah; Simarmata, Tualar Simarmata; Fakhrurroja, Hanif Fakhrurroja
Jurnal AGRO Vol. 12 No. 1 (2025)
Publisher : Jurusan Agroteknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/j.agro.44502

The consumption of red chili (Capsicum annum L.) increased annually, requiring higher productivity. However, this is not supported by optimal soil fertility which has a low nutrient content. This research aimed to examine the interaction between bioameliorant dose (B) and nutrient solution application interval (F) on phosphate solubilizing bacteria (PSB), available P, P uptake, fruit weight per plant, and fruit weight per fruit. The research was conducted using a Factorial Randomized Block Design with two factors and three replications (bioamelioran dosage: 0, 3, 6 t ha-1) and nutrient solution application interval: every one, three, and five days. The results showed an interaction effect on fruit weight with the best treatment being a bioameliorant dose of 3 t ha-1 and a nutrient solution interval once a day. The bioameliorant increased available P and the nutrient solution interval had influenced on soil available P and fruit weight per plant. Application of a bioameliorant dose of 3 t ha-1 and nutrient solution interval once a day produced the highest yield of chili. ABSTRAK Konsumsi cabai merah (Capsicum annum L.) meningkat setiap tahunnya, sehingga membutuhkan produktivitas yang lebih tinggi. Namun, hal ini tidak didukung oleh kesuburan tanah yang optimal serta memiliki kandungan nutrisi yang rendah. Penelitian ini bertujuan untuk mengetahui interaksi antara dosis bioamelioran (B) dan interval pemberian larutan hara (F) terhadap bakteri pelarut fosfat (BPF), P-tersedia, serapan P, bobot buah per tanaman, dan bobot buah per buah. Penelitian dilakukan menggunakan Rancangan Acak Kelompok Faktorial dengan dua faktor dan tiga ulangan (dosis bioamelioran: 0, 3, 6 t ha-1) dan interval pemberian larutan hara: setiap satu, tiga, dan lima hari. Hasil penelitian menunjukkan adanya pengaruh interaksi terhadap rerata berat buah, dengan perlakuan terbaik adalah dosis bioamelioran 3 t ha-1 dan interval pemberian larutan hara satu kali sehari. Pemberian bioamelioran mampu meningkatkan P-tersedia. Interval pemberian larutan hara mempengaruhi kandungan P-tersedia tanah dan bobot buah per tanaman. Aplikasi bioamelioran dengan 3 t ha-1 dan interval pemberian larutan hara satu kali sehari menghasilkan hasil cabai merah tertinggi. Kata kunci: Cabai Merah, Mikroba Menguntungkan, Pembenah Tanah, Unsur Hara

The influence of ameliorant, nutrient solution and bioferilizer on soil P, plant P uptake, and yield of red chili. Fitriatin, Betty Natalie; Dupa, Putri Siska Ekayanti; Fauziah, Nicky Oktav; Wong, Mui-Yun; Simarmata, Tualar
Jurnal AGRO Vol. 11 No. 1 (2024)
Publisher : Jurusan Agroteknologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15575/35886

The productivity and quality of red chili are greatly influenced by soil conditions and the availability of nutrients. Nutrients play a critical role in the growth and development of red chili plants. This experiment aimed to determine the combination of ameliorant, nutrient solution, and biofertilizer on the population of phosphate-solubilizing bacteria (PSB), available P, P-uptake, and red chili production in Inceptisols. The experiment was conducted at the experimental field of the Faculty of Agriculture, Universitas Padjadjaran. The experiment used a Randomized Complete Block Design (RCBD) with seven treatments and four replications, consisting of control, NPK, and nutrient solution (NS) with doses of 0, 6, and 12 kg ha-1 biofertilizers. The dosage used in a single application was 15 g plant-1 of NPK fertilizer and 300 mL plant-1 of nutrient solution. The base fertilizer consisted of manure in the control treatment and an ameliorant in other treatments at a dose of 4 t ha-1. The results showed that the combination of ameliorant + NPK + 6 kg ha-1 biofertilizer increased PSB population (4.93 x 106 CFU mL-1), available P (15.4 ppm), and P-uptake (0.74 g plant-1). Meanwhile, the combination of ameliorant + nutrient solution + 6 kg ha-1 biofertilizer increased fruit diameter (15 mm), and length of red chili (17.3 cm). Correlation analysis indicated positive correlation between red chili production with stem diameter and fruit length, but a negative correlation with P-uptake. Regression analysis indicated that stem diameter and PSB population had the most dominant effect on red chili yield. Produktivitas dan kualitas cabai merah sangat dipengaruhi oleh kondisi tanah dan ketersediaan unsur hara. Unsur hara memegang peranan penting dalam pertumbuhan dan perkembangan tanaman cabai merah. Percobaan ini bertujuan untuk mengetahui kombinasi amelioran, larutan hara dan biofertilizer terhadap populasi bakteri pelarut fosfat (BPF), P tersedia, serapan P, dan produksi cabai merah pada tanah Inceptisols. Percobaan dilaksanakan di lahan percobaan Fakultas Pertanian Universitas Padjadjaran. Percobaan menggunakan Rancangan Acak Kelompok Lengkap (RAKL) dengan tujuh perlakuan dan empat kali ulangan, terdiri dari: kontrol, NPK dan Larutan Hara dengan dosis 0, 6, dan 12 kg ha-1 pupuk hayati. Dosis yang digunakan dalam satu kali aplikasi adalah pupuk NPK 15 g tanaman-1 dan larutan hara 300 mL tanaman-1. Pupuk dasar berupa pupuk kandang pada perlakuan kontrol dan amelioran pada perlakuan lain dengan dosis 4 t ha-1. Hasil penelitian menunjukkan bahwa kombinasi amelioran + NPK + 6 kg ha-1 pupuk hayati mampu meningkatkan populasi BPF (4,93 x 106 CFU mL-1), P tersedia (15,4 ppm), dan serapan P (0,74 g tanaman-1). Sementara itu, kombinasi amelioran + larutan hara + 6 kg ha-1 pupuk hayati mampu meningkatkan diameter buah (15 mm), dan panjang cabai merah (17,3 cm). Analisis korelasi menunjukkan korelasi positif antara produksi cabai merah dengan diameter batang dan panjang buah, tetapi korelasi negatif dengan serapan P. Analisis regresi menunjukkan bahwa diameter batang dan populasi BPF memiliki pengaruh paling dominan terhadap hasil cabai merah.

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