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Jurusan Agronomi dan Hortikultura, Gedung C Fakultas Pertanian, Universitas Lampung. Jln. Sumantri Brojonegoro No 1 Gedung Meneng, Bandar Lampung 35145, Indonesia
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INDONESIA
Jurnal Agrotropika
Published by Universitas Lampung
ISSN : 02167662     EISSN : 27457737     DOI : 10.23960
Core Subject : Science, Agriculture,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology
Scientific article dealing with broad aspects of tropical agronomy including crop production, horticulture, plant pests and diseases, post-harvest, sustainable agriculture, soil science, climatology, ecology, biodiversity, and ethno-agronomy.
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Agronomi dan Ilmu Tanaman
Articles 252 Documents
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Biochar: Pemanfaatan dan Aplikasi Praktis Evizal, Rusdi; Prasmatiwi, Fembriarti Erry
JURNAL AGROTROPIKA Vol. 22 No. 1 (2023): Jurnal Agrotropika Vol 22 No 1, Mei 2023
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/ja.v22i1.7151

Abstract

Biochar is a carbon-rich solid produced from the pyrolysis of biomass such as wood, manure, and leaves under high temperature and low oxygen conditions which is used for agricultural applications as a soil amendment. This paper reviews the utilization and practical application of biochar. The application of biochar into the soil can improve the physical, chemical and biological properties of the soil, namely increasing porosity, water holding capacity, soil aggregation, increasing pH, cation exchange capacity, soil organic carbon, nutrient retention and availability, and increasing microbial life, meso and soil macrofauna. Aside from being a soil amendment, biochar has a function on issues of global warming, climate change, and the environment, namely its role in carbon sequestration and stabilization, greenhouse gas emissions, and soil pollutant remediation. If biochar is applied properly, namely using the right feedstock materials, method of manufacture, dosage, method of application, and place, it will affect agronomic performance and crop yields. Reduced yields are mostly occured in temperate climates as biochar significantly increases soil pH causing an effect of excessive liming resulting in immobilization of key nutrients such as Mg, Fe, B, and P. Biochar needs to be mixed or applied together with fertilizer ingredients such as chemical fertilizers, bio-fertilizers, compost, and manure. Another effort is to enrich biochar with those materials so that biochar is categorized as a biochar-based fertilizer that has a higher selling price. Key words : Application, biochar, benefit, method, crop yield
Pengaruh Ekstrak Daun Senduduk Bulu (Clidemia hirta L.) terhadap Perkecambahan dan Pertumbuhan Gulma (Praxelis clematidea) Lestari, Andriani Dwi; Pujisiswanto, Hidayat; Susanto, Herry; Sriyani, Nanik
JURNAL AGROTROPIKA Vol. 22 No. 1 (2023): Jurnal Agrotropika Vol 22 No 1, Mei 2023
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/ja.v22i1.7370

Abstract

Weeds are plants whose existence is not expected by farmers because they interfere with cultivated plants. But there are weeds that can produce phenolic compounds such as Clidemia hirta L which can be used as bioherbicides. This study aims to determine the effect of Clidemia hirta L. leaf extract on the germination and growth of Praxelis clematidea weeds. The research was carried out from June 2021 to September 2021 at the Weed Science Laboratory and Integrated Field Laboratory, Faculty of Agriculture, University of Lampung. This study used a completely randomized design (CRD) method with 6 treatments with concentrations of Clidemia hirta L leaf extract, namely 0; 1.5; 3.0; 4.5; 6.0; and 7.5%. Each treatment was repeated 6 times to obtain 72 experimental units. The observed variables are germination, crown height, root length, dry weight, and weed poisoning level. The data obtained were analyzed by analysis of variance and continued with the Least Significant Difference Test (LSD) at the 5% level. The results showed that the germination of Praxelis clematidea weed was significantly inhibited by the treatment of Clidemia hirta L leaf extract with a concentration of 1.5; 3.0; 4.5; 6.0; and 7.5%. While concentrations of 3.0%, 4.5%, 6.0%, and 7.5% Clidemia hirta L. leaf extract  inhibited the growth of Praxelis clematidea weeds in the greenhouse. Key words:  Clidemia hirta L., extract, Praxelis clematidea, germination, growth
Pengaruh Lama Perendaman Benih dalam Larutan CaCO3 terhadap Pertumbuhan Bibit Kakao (Theobroma cacao L.) pada Media Tanaman yang Berbeda Ericson, Gaol Uli Lumban; Sugiatno, Sugiatno; Edy, Akari; Susanto, Herry
JURNAL AGROTROPIKA Vol. 22 No. 1 (2023): Jurnal Agrotropika Vol 22 No 1, Mei 2023
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/ja.v22i1.7432

Abstract

The presence of pulp in cocoa seeds is known to inhibit seed germination and seedling growth. The conventional method of removing pulp from cocoa seeds is done mechanically by rubbing the seeds with rubbing ash. Conventional pulp removal has disadvantages, such as being less practical and potentially damaging the seed surface. Therefore, it is necessary to try chemically removing the pulp from cocoa seeds by soaking the seeds in a lime solution (CaCO3). This study aims to determine the effect of the duration of cocoa seed soaking in CaCO3 solution and different planting media compositions on seedling growth. The research was conducted from September to December 2021 at a plastic house in Labuhan Dalam Village, Tanjung Senang District, Bandar Lampung, and the Seed Laboratory, Faculty of Agriculture, University of Lampung, Gedong Meneng, Bandar Lampung. The study used a Completely Randomized Design (CRD) arranged in a factorial manner. The first factor was the duration of cocoa seed soaking in CaCO3 solution, consisting of no soaking, soaking for 30, 60, 120, and 240 minutes. The second factor was the planting media composition, consisting of a mixture of rice husk charcoal + manure, sand + manure, and sand + rice husk charcoal + manure. Each treatment combination was replicated three times, resulting in 45 experimental units. The observation data were analyzed using analysis of variance, and the mean differences were tested using the Least Significant Difference (LSD) test at the 5% level. The results of the study showed that the duration of cocoa seed soaking in CaCO3 solution had no effect on cocoa seedling growth. The planting media composition of sand + rice husk charcoal + manure had a significant effect on the best cocoa seedling growth compared to the planting media compositions of rice husk charcoal + manure and sand + manure. Soaking cocoa seeds in CaCO3 solution had no effect on cocoa seedling growth in different planting media. Keywords : Cocoa seeds, pulp, CaCO3, soaking, planting media
Optimasi Konsentrasi Paklobutrazol untuk Respons Pembungaan Tanaman Jambu Biji 'Kristal' Yutamimah, Siti Sarah; Widyatuti, R. A. Diana; Utomo, Setyo Dwi; Ginting, Yohannes Cahya
JURNAL AGROTROPIKA Vol. 22 No. 1 (2023): Jurnal Agrotropika Vol 22 No 1, Mei 2023
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/ja.v22i1.7449

Abstract

The advantages of 'Crystal' guava in Indonesia provide opportunities for farmers to cultivate and increase their production. Various methods of cultivation have been developed to increase the production of 'Crystal' guava, one of which is the use of Growth Regulators. Paclobutrazol is a plant PGR that regulates flowering outside the harvest season so that the production of 'Crystal' guava fruit can be maintained. The purpose of this study was to determine the best concentration of the effect of Paclobutrazol treatment in increasing the flowering of 'Crystal' guava plants. The research was conducted from August 2021 to March 2022 in Rajabasa Lama 1 Village, Labuhan Ratu District, East Lampung Regency. The treatment was carried out in a factorial manner using a single factor randomized block design with three replications so that 36 experimental units were obtained. The first factor was Paclobutrazol (A) which consisted of 6 treatment levels, there are A1 (0 ppm), A2 (4000 ppm), A3 (6000 ppm), A4 (8000 ppm), A5 (10,000 ppm), A6 (12,000 ppm). Paclobutrazol treatment with a concentration of 10,000 ppm gave the best results on the variables of flower number, number of ovules, number of harvested fruit and weight of harvested fruit. Keywords : Paclobutrazol, Concentration, ‘Crystal’ Guava Plants
Pertumbuhan Metarhizium rileyi dengan Penambahan Biji Sirsak dan Umbi Gadung untuk Mendukung Laju Pertumbuhan Cendawan Entomopatogen Senja, Safira Nurmala; Afifah, Lutfi; Sugiarto, Sugiarto; Kurniati, Anik
JURNAL AGROTROPIKA Vol. 22 No. 1 (2023): Jurnal Agrotropika Vol 22 No 1, Mei 2023
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/ja.v22i1.7452

Abstract

Mikroorganisme yang dapat dimanfaatkan sebagai agens pengendalian hama secara hayati salah satunya adalah cendawan entomopatogen Metarhizium rileyi. Penambahan ekstrak biji sirsak dan umbi gadung sebagai media alternatif yang kaya akan nutrisi mampu memengaruhi pertumbuhan cendawan entomopatogen M. rileyi. Penelitian ini bertujuan untuk mendapatkan media pertumbuhan terbaik cendawan M. rileyi yang dicampur dengan ekstrak biji sirsak dan umbi gadung. Metode yang digunakan adalah metode eksperimental dan rancangan percobaan yang digunakan adalah Rancangan Acak Lengkap (RAL) faktor tunggal yang terdiri dari 7 perlakuan dan diulang 4 kali. Perlakuan tersebut antara lain Kontrol (PDA), PS1 (PDA + ekstrak biji sirsak 1 ml/l), PS3 (PDA + ekstrak biji sirsak 3 ml/l), PS5 (PDA + ekstrak biji sirsak 5 ml/l), PG1 (PDA + ekstrak umbi gadung 1 g/l), PG3 (PDA + ekstrak umbi gadung 3 g/l), PG5 (PDA + ekstrak umbi gadung 5 g/l). Hasil yang dicapai dari penelitian ini adalah penambahan ekstrak biji sirsak dan umbi gadung ke dalam media tumbuh M. rileyi memberikan pengaruh yang tidak nyata terhadap diameter koloni 21 hsi dengan rata-rata diameter koloni berkisar 8,95-9,00 cm, sedangkan hasil analisis regresi dan waktu inkubasi selama 21 hari berpengaruh nyata terhadap laju pertumbuhan koloni M. rileyi sebesar 44% hingga 77%. Hubungan laju pertumbuhan koloni M. rileyi dengan waktu inkubasi pada semua perlakuan menunjukkan nilai R2 sebesar 0,44 hingga 0,77. Media paling efektif untuk pertumbuhan cendawan M. rileyi adalah media PDA dengan ekstrak umbi gadung 1 g/l dengan diameter koloni 9,00 cm.
Struktur Agroforestri Kakao Muda dan Penerimaan Petani di Desa Sidomulyo Kecamatan Air Naningan, Tanggamus Evizal, Rusdi; Prasmatiwi, Fembriarti Erry
JURNAL AGROTROPIKA Vol. 22 No. 2 (2023): Jurnal Agrotropika Vol 22 No 2, Oktober 2023
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/ja.v22i2.7488

Abstract

The successful adaptation of cocoa clones from Sulawesi in Lampung Province, especially since the release of the MCC clone in 2015, has increased farmers' interest in rehabilitating cocoa plantations, carrying out cloning and replanting using these superior clones. This study aims to study the structure of young cocoa agroforestry vegetation and farmer income in Air Naningan District, Tanggamus Regency.The research was conducted using a survey method. The sample agroforestry gardens selected purposively as models were young agroforests with complex vegetation structures and agroforests with simple vegetation structures. The results of this study indicate that the rehabilitated young cocoa-based agroforestry vegetation structure is affected by the previous tree stands. In addition, the vegetation is dominated by banana plants as productive shade so that the main crops are cocoa and bananas. In complex agroforestry systems, more types of associated crops are found than in simple agroforestry systems. Important structures as characteristics of young cocoa agroforestry are young interplanting which will later become the main crops, namely cocoa, coffee and avocado. In addition, in complex agroforestry types, tree structures with stump sprouts (regrowth trees) are found which are often pruned as goat fodder. In both types of agroforestry, various types of understorey crops were found from the food crop group, vegetables, fruit, and spices. Weekly revenue for rehabilitated cocoa-based agroforestry come from cocoa and banana yields. Palm sugar (Arenga pinnata) production is an important source of daily revenue for agroforestry farmers who manage palm trees. Key words : Agroforestry, Arenga, banana, cacao, coffee,  rubber, rehabilitation, revenue, taro
Efikasi Herbisida Parakuat Diklorida terhadap Gulma pada Kebun Kelapa Sawit (Elaeis guineensis Jack.) Belum Menghasilkan (TBM) Pujisiswanto, Hidayat; Putri, Athmarratu Wintani; Evizal, Rusdi; Sriyani, Nanik
JURNAL AGROTROPIKA Vol. 22 No. 2 (2023): Jurnal Agrotropika Vol 22 No 2, Oktober 2023
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/ja.v22i2.7686

Abstract

Pertumbuhan gulma pada kebun kelapa sawit (Elaeis guineensis Jacq.) dapat merugikan pertumbuhan tanaman sehingga perlu dilakukan pengendalian. Salah satu alternatif untuk mengendalikan gulma dengan menggunakan herbisida parakuat diklorida. Penelitian ini bertujuan untuk mengetahui efikasi herbisida parakuat diklorida terhadap gulma pada tanaman kelapa sawit. Penelitian dilaksanakan pada bulan September-November 2022 di Desa Sido Mukti, Kecamatan Natar, Kabupaten Lampung Selatan dan Laboratorium Ilmu Gulma Universitas Lampung. Penelitian menggunakan Rancangan Acak Kelompok (RAK) dengan 6 perlakuan dan 4 ulangan. Perlakuan yang ditetapkan yaitu Parakuat diklorida 276 g/l dosis 621 g/ha, Parakuat diklorida 276 g/l dosis 828 g/ha, Parakuat diklorida 276 g/l dosis 1.035 g/ha, Parakuat diklorida 276 g/l dosis 1.242 g/ha, penyiangan manual dan Kontrol (tanpa pengendalian gulma). Uji homogenitas ragam data dilakukan dengan uji Barlett, uji aditivitas dengan menggunakan uji Tukey. Jika syarat asumsi memenuhi, maka data dianalisis dengan sidik ragam dan untuk menguji perbedaan nilai tengah dilakukan dengan uji Beda Nyata Terkecil (BNT) pada taraf 5%. Hasil penelitian menunjukkan Herbisida parakuat diklorida pada dosis 621 g/ha – 1.242 g/ha efektif mengendalikan pertumbuhan gulma total, gulma golongan daun lebar, gulma dominan Praxelis clematidea, Borreria alata, dan Paspalum conjugatum. Sedangkan pada taraf dosis 828 g/ha – 1.242 g/ha efektif mengendalikan gulma golongan rumput, gulma dominan Digitaria ciliaris, dan Eleusine indica. Koefisien komunitas (C) pada 4 dan 8 minggu setelah aplikasi menunjukkan nilai < 75% yang menunjukkan perbedaan antar komunitas perlakuan. Aplikasi herbisida parakuat diklorida pada piringan tanaman kelapa sawit belum menghasilkan tidak menimbulkan keracunan pada tanaman kelapa sawit. Kata kunci: Fitotoksisitas, herbisida, parakuat diklorida, gulma, kelapa sawit
Efikasi Herbisida Isopropil Amina Glifosat 480 g/l Terhadap Gulma Pada Persiapan Lahan Sawah Dengan Sistem Tanpa Olah Tanah Dan Pengaruhnya Terhadap Tanaman Padi Rifa'i, Thaher; Susanto, Herry; Nurmauli, Niar; Pujisiswanto, Hidayat
JURNAL AGROTROPIKA Vol. 22 No. 2 (2023): Jurnal Agrotropika Vol 22 No 2, Oktober 2023
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/ja.v22i2.7689

Abstract

One of the efforts to control weeds in preparing land for lowland rice cultivation with the No-Tillage system one of which uses isopropylamineglyphosate herbicide. The purpose of this study was to determine the dose of glyphosate herbicide that effectively controls weeds for preparation of lowland rice planting with the no tillage system, to determine changes in weed composition in lowland rice after the application of glyphosate herbicide, and to determine the effect of the no tillage system after the application of glyphosate herbicide on growth and paddy yields. Data collection was carried out from June to September 2022 in the rice fields of Trimurjo District, Central Lampung Regency and the Weed Science Laboratory, Faculty of Agriculture, University of Lampung. The treatment was arranged using a randomized block design with 4 replications and 6 treatments consisting of the glyphosate herbicide doses (1,080; 1,440; 1,800; 2,160 g/ha) + no tillage, manual weeding, and intensive tillage system. Homogeneity of variance was tested by Barlett's test and then analyzed for variance. Separation of the mean was carried out using the least significant difference test (LSD) at the 5% level. The results showed that the herbicide isopropylamine glyphosate doses of 1,800 and 2,160 g/ha of the no tillage system could be used to replace the intensive tillage system because it was effective in controlling total weeds, sedges, grasses, and broad leaf groups, dominant weed Fimbristylis miliacea, Echinochloa colonum, Ludwigia octovalvis and Monochoria vaginalis up to 6 WAP, causing a change in the composition of weed species from Echinochloa colonum become monochoria vaginalis at 3 WAP, and from Echinochloa colonum become Ludwigia octovalvis at 6 WAP. The growth  is not stunted and yield of lowland rice plants is equivalent to the intensive tillage system with grain yields per hectare of 5.14 - 5.49 t/ha. Key words : weeds, isopropylamine glyphosate, paddy field, no tillage
Pengaruh frekuensi pemupukan setelah forcing terhadap produktivitas buah tanaman nanas (Ananas comosis [L.] Merr.) Azizah, Nur; Widyastuti, R. A. Diana; Karyanto, Agus; Ginting, Yohannes Cahya
JURNAL AGROTROPIKA Vol. 22 No. 2 (2023): Jurnal Agrotropika Vol 22 No 2, Oktober 2023
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/ja.v22i2.7697

Abstract

Pineapple (Ananas comosus [L.] Merr) is one of the potential horticultural commodities and is a mainstay of exports in Indonesia.  Pineapple fruit productivity can be increased through the fertilization process. One of the fertilization processes in pineapple plants is fertilization after forcing.  The nutrients needed by pineapple plants after forcing are nitrogen and potassium which can support plant growth and increase pineapple fruit production. The purpose of this study was to determine the effect of the frequency of fertilization after forcing and to find out which treatment had the highest productivity. The research was conducted from October 2022 to April 2023 at the Central Lampung Pineapple Plantation, Lampung Province. This study used a single factor randomized block design (RBD), namely the frequency of fertilization on the day after forcing (HSF). The treatment consisted of four levels, namely twice fertilization given at 20 and 55 HSF (P1), two times fertilization given at 15 and 30 HSF (P2), three times fertilization given at 15, 30, 45 HSF (P3) and four times of fertilization given at 15, 30, 45, 60 HSF (P4). Each fertilization application uses Urea 50 kg/ha and K2SO4 75 kg/ha. Each treatment was repeated four times to obtain 16 experimental units. The results showed that the frequency of fertilization after forcing had an effect on the weight of 12 eyed fruit, the length of 11 and 12 eyed fruit, the diameter of 12 eyed fruit, and the weight of 12 eyed crowns in pineapple plants. The fertilization that was able to produce the best pineapple fruit productivity was fertilization with twice the frequency at 15 HSF and 30 HSF which produced the highest production potential compared to the control treatment with a difference of 2.51%.Keywords : pineapple, fertilization, HSF (Days After Forcing)
Pengaruh Metode Aplikasi dan Konsentrasi Gibberellic Acid (GA3) terhadap Fase Pertumbuhan Vegetatif Tanaman Nanas (Ananas comosus [L.] Merr) Maraaini, Ajeng; Widyastuti, R. A. Diana; Warganegara, Hayane Adeline; Karyanto, Agus
JURNAL AGROTROPIKA Vol. 23 No. 1 (2024): Jurnal Agrotropika Vol 23 No 1, Mei 2024
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/ja.v23i1.7698

Abstract

Increasing the production of pineapple fruit can be done by manipulating the plant using Gibberellic Acid Growth Regulatory Substance (ZPT).  The purpose of this study was to determine the effect of GA3 concentration and application method, as well as its interaction in increasing the vegetative growth of pineapple plants.  Data collection was carried out in November 2022- February 2023 at a pineapple plantation company in Central Lampung. Treatments were arranged factorial (3x2) using a randomized block design with 3 replications. The first factor was Gibberellin (A) which consisted of three levels, (A1) 0 ppm GA3, (A2) 200 ppm GA3, and (A3) 400 ppm GA3.  The second factor is the application method (B) which consists of 2 levels, namely (B1) Application on the top of the leaf (B2) Application on the bottom of the leaf. The observed variables included plant height, stem diameter, number of leaves, D-leaf length, D-leaf width, number of roots, root length, fresh weight of roots, fresh weight of plants. Homogeneity of variance between treatments was tested by Barlett's test and additivity using Tukey's test and then analysis of variance was carried out.  Separation of the mean was carried out using the least significant difference test (LSD) at the 5% level. The results showed that 400 ppm GA3 was better than the control in affecting plant fresh weight with a difference of 630,7 g, the treatment of the application method on the leaves was better than the bottom leaf in affecting plant fresh weight with a difference 201,4 g. Treatment with a concentration of 40 ppm using the leaf application method was better than the control treatment. It is suggested to do further research related to the effect of giving GA3 on the generative phase of pineapple plants.Keywords : Gibberellic Acid, application method, pinneaple

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