suwarto ,
Departemen Agronomi dan Hortikultura, Fakultas Pertanian, Institut Pertanian Bogor (Bogor Agricultural University), Jl. Meranti Kampus IPB Darmaga, Bogor 16680, Indonesia

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PERANCANGAN MODEL PERTANIAN TERPADU TANAMAN-TERNAK DAN TANAMAN-IKAN DI PERKAMPUNGAN TEKNOLOGI TELO, RIAU ,, Suwarto; Aryanto, Agustinus Tri; Effendi, Irzal
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 43 No. 2 (2015): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (539.013 KB) | DOI: 10.24831/jai.v43i2.10424

Abstract

ABSTRACTThe Telo Technology Village of Bangkinang Seberang, Kampar, Riau was built on reclaimed land of C-mining excavation. On this land will be settled a number of farmer households pursue an area of 2,000 m2 in each. They should be able to maximize the land use to meet family needs adequately. In order to develop integrated farming system composed of crop, livestock, and fish productions, data were collected through interviews and literature. This study was conducted from February to July 2013. Models of integrated farming were designed and evaluated for its feasibility ecologically and economically using dynamic model Stella 9.2. Based on the models, integrated farming of spinach-kangkong-chili, cattle-laying ducks and Thai catfish-Tilapia fish will be able to provide an adequate income. Therefore area of 2,000 m2 is feasible for integrated farming, settlements and other households activities.Keywords: high mapping layer, LEISA, nutrient cycle
PERMODELAN PERTUMBUHAN DAN PRODUKSI KELAPA SAWIT PADA BERBAGAI TARAF PENUNASAN PELEPAH Gromikora, Nope; Yahya, Sudirman; ,, suwarto
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 42 No. 3 (2014): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (754.027 KB) | DOI: 10.24831/jai.v42i3.9179

Abstract

ABSTRACTThe numbers of leaf frond influence oil palm yield, especially fresh fruit bunch weight and fresh fruit bunch production. The objective of this research was to obtain oil palm growth and production model for different levels of frond pruning. The experiment was conducted at PT. Astra Agro Lestari, Pangkalan Bun, Central Kalimantan, from August 2010 to February 2012. The experiment was arranged in a randomized block design with two factors and three replications for each oil palm age. The first factor was numbers of unpruned frond and the second factors was pruning seasons. The frond treatment consisted of 41-48, 49-56, and 57-64 fronds. The pruning seasons consisted of first period (early to mid rainy season: September-December), second period (mid to end of rainy season: Januari-April), and third period (dry season: May-August). Stella production model was created based on pruning experiment and weather data. The constructed production model was able to estimate 75% variable of oil palm production and fresh fruit bunch weight at different levels of pruning. Keywords: oil palm, pruning management, Stella model
PERTUMBUHAN TITHONIA DIVERSIFOLIA DENGAN DOSIS PUPUK KANDANG DAN JARAK TANAM YANG BERBEDA Desyrakhmawati, Lia; Melati, Maya; ,, Suwarto; Hartatik, Wiwik
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 43 No. 1 (2015): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (645.092 KB) | DOI: 10.24831/jai.v43i1.9595

Abstract

Mexican sunflower (Tithonia diversifolia) is a invansive weed but it can be used as continuous and on-farm source of nutrient for organic farming system. The objective of this study was to investigate growth and biomass production of T. diversifolia with different rates of chicken manure and plant spacings. The experiment was conducted at Cikarawang, Bogor, on Inceptisol soil type, from October 2011 until January 2012. The experiment was arranged in a randomized block design with 2 factors and 3 replications. The rates of chicken manure were  0, 2.5, 5 and 10 ton ha-1, while the plant spacings were 50 cm x 50 cm and 75 cm x 75 cm. The interaction effect between manure rates and plant spacing was significant on nett assimilation rate at 4-8 weeks after planting, but it was not significant on biomass production. The highest dry weight of biomass (1,129.1 kg ha-1) was obtained from the addition of 10 ton chicken manure ha-1 with the potential contribution as much as 55.47 kg N, 4.54 kg P, 88.54 kg K per hectare. The highest dry weight of biomass produced with planting distance 50 cm x 50 cm (897 kg ha-1). Referring to the results, it can be recommended that the cultivation of T. diversifolia at the first planting needs 10 ton chicken manure ha-1 and the planting distance of 50 cm x 50 cm.Keywords: biomass production, Mexican sun flower, nett assimilation ratio, nutrient contributio, weed
EFISIENSI PENGGUNAAN CAHAYA MATAHARI DAN PARTISI KARBOHIDRAT TANAMAN SORGUM PADA BERBAGAI TINGKAT PEMUPUKAN NITROGEN Aznur, Firmansyah; ,, Suwarto; Purnamawati, dan Heni
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 45 No. 3 (2017): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (495.4 KB) | DOI: 10.24831/jai.v45i3.13580

Abstract

Light use efficiency (LUE) determines biomass production based on interception energy during photosynthesis. The product of photosynthesis is allocated to the plants organs based on the partitioning of carbohydrates. The LUE and carbohydrate partitioning are two important parameters in crop modelling. The research was conducted at Cikabayan experimental station of IPB, Bogor from July to November 2015. The experiment was designed according to a randomize block design with five replications. The fertilizer treatments rate were 0%, 50%, 100%, 150%, and 200% of reference N fertilization of 120 kg ha-1.  The  value  of  light use efficiency and the partition coefficient of sorghum were not affected by N fertilization. The value of light use efficiency is 1.41 g MJ-1. The carbohydrates partitioning was developed based on plant growth stage. The partition from the planting to the emergence stage (0 ? s ? 0.25) was 0.81 x s/0.25 root, 0 stem, 0.19 x s/0.25 leaves, and 0 panicle. The partition from the emergence to the maximum vegetative stage (0.25 < s ? 0.5) was 0.81-(0.59 x s/0.5) root, 0.14 x s/0.5  stem, 0.19 + (0.45 x s/0.5) leaves, and 0 panicle. The partition from the maximum vegetative stage to the flowering stage (0.5 < s ? 0.75) was 0.22 - (0.09 x s/0.75) root, 0.14 + (0.39 x s/0.75) stem, 0.64 - (0.46 x s/0.75) leaves, and 0.16 x s/0.75 panicle. The partition from flowering to the harvest stage (0.75 < s ? 1) was 0.13 - (0.13 x s) root, 0.53 - (0.52 x s) stem, 0.18-(0.18 x s) leaves, and 0.16 + (0.84 x s) panicle.Keywords: crop modelling, light use efficiency, N fertilizer, partitioning carbohydrates
MENINGKATKAN HASIL BELAJAR GEOGRAFI TENTANG BIOSFER MELALUI MODEL PEMBELAJARAN KOOPERATIF TIPE JIGSAW PADA SISWA KELAS XI IPS SMA NEGERI 1 PATI TAHUN 2013 Rodliyah, Siti; ,, Suwarto; Soegiyanto, Heribertus
GeoEco Vol 1, No 2 (2015): Jurnal GeoEco Juli 2015
Publisher : Universitas Sebelas Maret (UNS)

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Abstract

Penelitian dilatar belakangi oleh rendahnya hasil belajar siswa pada mata pelajaran geografi/dibawah kriteria ketuntasan minimal (KKM) yang ditentukan oleh sekolah yaitu 77. Penelitian ini bertujuan untuk mengetahui; 1) peningkatan hasil belajar geografi tentang biosfer melalui pembelajaran dengan model pembelajaran kooperatif tipe jigsaw pada siswa kelas XI IPS SMA Negeri 1 Pati Tahun 2013, 2) peningkatan aktivitas siswa belajar geografi tentang biosfer melalui pembelajaran dengan model kooperatif tipe jigsaw pada siswa kelas XI IPS SMA Negeri 1 Pati Tahun 2013. Metode yang digunakan dalam penelitian ini adalah penelitian tindakan kelas yang dilaksanakan dengan dua siklus dan tiap siklus meliputi empat tahapan dimulai dari perencanaan tindakan, pelaksanaan tindakan, observasi dan merefleksi. Penelitian ini bersifat kolaboratif yang melibatkan seorang teman guru geografi mulai dari perencanaan, sebagai observer dan merefleksi. Analisis data yang digunakan adalah dengan teknik analisis statistik deskriptif dan deskri[ptif kualitatif. Subyek penelitian ini adalah siswa kelas XI IPS SMA Negeri 1 Pati tahun 2013. Pengumpulan data dengan metode observasi untuk mengetahui aktivitas siswa dalam proses pembelajaran geografi dan tes untuk mengetahui hasil belajar siswa. 1) Hasil yang diperoleh dalam penelitian ini rata-rata nilai meningkat dari sebelum diberi tindakan (pretest ) sampai pada setelah diberi tindakan siklus I dan siklus II. Rata-rata pretest siklus I mencapai 56,55; rata-rata siklus I mencapai 70,59; rata-rata pretest siklus II mencapai 76,19 dan rata-rata siklus II mencapai 82,14. Peningkatan hasil belajar siswa ini diikuti pula peningkatan aktivitas siswa dalam mengikuti proses pembelajaran. Penilaian aktivitas siswa didapat dari: respon siswa dalam mengikuti pelajaran siklus I sebesar 57,5% naik menjadi 90% pada siklus II, interaksi siswa pada siklus I sebesar 62,5% naik menjadi 87,5% pada siklus II , kerjasama 67,5% pada siklus I naik menjadi 92,5% pada siklus II, dan tanggung jawab pada siklus I sebesar 62,5% naik menjadi 95% pada siklus II. Dari hasil penelitian tersebut, kesimpulan yang dapat diambil adalah penerapan model pembelajaran kooeratif tipe jigsaw dapat meningkatkan hasil belajar dan aktivitas siswa belajar geografi tentang biosfer pada siswa kelas XI-IPS SMA Negeri 1 Pati tahun 2013.Kata Kunci: Pembelajaran kooperatif Tipe Jigsaw, Hasil Belajar
TRANSFORMASI MATA PENCAHARIAN DARI PETANI KE NELAYAN DI PANTAI DEPOK DESA PARANGTRITIS KABUPATEN BANTUL Sulistiyono, Dwi; ,, Suwarto; Rindarjono, Mohammad Gamal
GeoEco Vol 1, No 2 (2015): Jurnal GeoEco Juli 2015
Publisher : Universitas Sebelas Maret (UNS)

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Abstract

Penurunan produktivitas lahan pertanian yang secara langsung berdampak terhadap penurunan pendapatan petani mendorong masyarakat petani mencari alternatif lain sebagai mata pencaharian dan peningkatan pendapatan. Dikarenakan mereka tidak mampu untuk mencukupi kebutuhan hidup keluarganya. Perubahan mata pencaharian tersebut tentunya melalui suatu proses, ada faktor-faktor yang mempengaruhinya, serta akan berdampak terhadap kehidupan ekonomi, sosial dan budaya mereka. Metode penelitian yang digunakan dalam penelitian ini adalah penelitian diskriptif kualitatif. Penelitian ini menggunakan teknik purposive sampling. Informasi diperoleh dari petani- nelayan dan beberapa individu yang secara tidak langsung terlibat dalam usaha penangkapan ikan di Pantai Depok. Hasil penelitian Ada dua faktor yang menyebabkan terjadinya perubahan mata pencaharian, yaitu faktor internal meliputi: kondisi ekologis, kepemilikan lahan semakin sempit, tekanan ekonomi, rendahnya tingkat pendidikan dan ketrampilan yang dimiliki oleh masyarakat serta adanya komunitas jaring eret. Sementara factor eksternal disebabkan oleh pengaruh-pengaruh dari luar melalui agen of change adanya nelayan pendatang, perhatian pemerintah, sector pariwisata yang berkembang. Perubahan mata pencaharian dari petani kenelayan ini berdampak terhadap kehidupan ekonomi, pendapatan mereka semakin meningkat. Kehidupan sosial, hubungan sosial terhadap keluarga dan masyarakat semakin melemah, Kehidupan berbudaya, masyarakat mengenal adanya upacara-upacara sedekahlaut. Perubahan ini juga berdampak terhadap sikap mental mereka, pada awalnya mereka memiliki pola pikir petani dengan konsep hidup hemat, tidak boros dan suka menabung. Setelah menjadi nelayan, pola pikir mereka berubah menjadi pola piker nelayan yang terkenal suka bergaya hidup konsumtif, boros dan suka berfoya-foya. Meskipun tidak semua nelayan melakukan hal yang sama, rumah tangga petani yang mengalami transformasi kenelayan masih memegang mekanisme internal tentang „pengendaliandiri‟ dalam bentuk menyisihkan sebagian pendapatan mereka untuk ditabung dan menginvestasikannya dalam bentuk barang.Kata Kunci: Petani, Nelayan, Transformasi, Ekonomi, Sosial dan Budaya.
PERTUMBUHAN DAN HASIL SORGUM DI TANAH LATOSOL DENGAN APLIKASI DOSIS PUPUK NITROGEN DAN FOSFOR YANG BERBEDA Suminar, Ratna; ,, Suwarto; Purnamawati, dan Heni
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 45 No. 3 (2017): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (432.401 KB) | DOI: 10.24831/jai.v45i3.14515

Abstract

Sorghum (Sorghum bicolor L. Moench) is prospective crop for food as well as feed and bioenergy. It adapts to wide agroclimate and agroecology. However, the productivity is accounted low in Indonesia. Low productivity of sorghum can be enhanced through intensification, e.g., precise dose of nitrogen and phosphorus fertilizers application. The aim of this research was to determine the optimum dose of nitrogen and phosphorus fertilizers to maximize growth and yield of sorghum in latosol soil, in order to develop fertilizer recommendation on specific soil type. The research was conducted at Cikarawang, Bogor from March to July 2015. Nitrogen and phosphorus fertilizers were arranged and applied simultaneously using randomized completely block design with three replications. Nitrogen fertilizer was applied in five levels, i.e., 0, 60, 120, 180, 240 kg N ha-1 and phosphorus levels were 0, 18, 36, 54, 72 kg P2O5 ha-1. Results showed that the application of nitrogen and phosphorus fertilizers significantly increased vegetative growth and yield components. The optimum dose were 161 kg N ha-1 (133.7%) and 43 kg P2O5 ha-1 (121.5%) for latosol soil.Keywords: fertilizer, optimum dose, soil type, vegetative, yield component