Jurnal Ilmu Pertanian Indonesia
ISSN : 08534217     EISSN : 24433462
Artikel yang dimuat meliputi hasil-hasil penelitian, analisis kebijakan, dan opini-opini yang berhubungan dengan pertanian dalam arti luas, seperti agronomi, ilmu tanah, hama dan penyakit tanamam, ilmu kehewanan, kedokteran veteriner, keteknikan pertanian, teknologi industri, teknologi pangan, ilmu gizi, keluarga dan konsumen, biometri, biologi, klimatologi, peternakan perikanan, kelautan, kehutanan, dan sosial-ekonomi pertanian yang telah dipertimbangkan dan disetujui oleh Dewan Editor. Keterangan mengenai peralatan, pengamatan, dan teknik percobaan akan diterima sebagai artikel CATATAN. Pedoman Penulisan dicantumkan pada setiap terbitan tercetak. Indeks Penulisan dan subjek serta daftar penelaan (mitra bestari) dicantumkan di tiap nomor terakhir pada setiap volume.
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Pendugaan parameter demografi dan bentuk sebaran spasial biawak komodo (Varanus komodoensis Ouwens 1912) di Pulau Rinca, Taman Nasional Komodo Santosa, Yanto; Muhammad, R. Yosi Zainal; Rahman, Dede Aulia
Jurnal Ilmu Pertanian Indonesia Vol 17, No 2 (2012): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

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Abstract

Komodo is one of the protected rare reptiles that can only be found within the Komodo National Park and the northern island of Flores. This study was aimed to determine the species poputation parameters and spatial distribution. Data collection on population and spatial distribution of komodo were conducted using 2O transects with four repetitions, of which 5 transects were placed in the deciduous forcst and 15 in the savannah with a total sampling anea of 200 ha. The form of spatial distribution was obtained using the methods of variance ratio, dispersion index, green index, clumping index and chi-square, In addition, vegetation analysis was carried out on a 4 ha sampling plot. Results of the observations indicated that the size of the komodo population on Rinca Island was 698 individuals with a density of 3.15 individuals/kmz comprised of: adults with 1,7 individuals/km2; sub-adults with 0.65 individuals/km2; juveniles with 0.8 individuals/kmz and infants with 0.4 individuals/kmr. The density of komodo in the deciduous forest (8.4 individuals/km2) was much higher than in the savannah (O.64 individuals/km2). The birth rate of komodo (LL.27o/o) was higher than the mortality rate (4.23ort), The sex ratio was 3:1. Within the study area, komodo distributed within clusters as indicated by the ratio of mean value of 3,77; dispersion index 3.72i green index O.O8; clumping index 2.72 and chi-square 167,059.6, Chance of encounters with Komodo in both types of habitat was much higher in the morning (80o/o) than during the day (20%).
Efisiensi Energi Bahan Bakar Sekam dan Kayu pada Proses Sterilisasi Media Tumbuh Jamur Tiram Putih Husin, Abdul Djamil; Irzaman, .; Juansah, Jajang; Umrih, Touwil; Hendratno, Khafit Pratama; Rahmadani, Ella; Effendy, Sumarjono
Jurnal Ilmu Pertanian Indonesia Vol 17, No 2 (2012): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

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Abstract

We have investigated the sterilization at media pleurotus otreatus using rice husk fuel and wood in various 6, 8 and 10 hours. We carried out efficiency energy for pleurotus otreatus medium sterilization at 8 hours using rice husk fuel is 14.28%, whereas efficiency energy for pleurotus otreatus medium sterilization using wood is 17.35%. The results show that cooking stove from rice husk are suitable for use as renewable energy technology applications to support E3i village (Energy, Economics and Environment).Keywords: eficiency energy, pleurotus otreatus, rice husk, sterilization
Pengembangan dan Aplikasi Geoinformatika Bayesian pada Data Kemiskinan di Indonesia (Studi Kasus Jawa Timur) Saefuddin, Asep; Wigena, Aji Hamim; Nuryartono, Nunung
Jurnal Ilmu Pertanian Indonesia Vol 17, No 2 (2012): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

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Abstract

Since a long time ago, poverty has been a problem that can not be solved. Indonesia’s Central Beureu of Statistics (CBS) survey on March 2011 show that there are 30.02 million people or 12.49% of total Indonesian are considered poor. From the point of view of many field of sciences the substance and the method to overcome this problem has become a very interesting topic of research. Based on statistical methods, poverty has become very interesting because there is an issue that there is an autocorrelation between data, spatial autocorrelation, error variance heterogenity, spatial interaction, and other statistical issues. The main objective of this research is to find factors that influence poverty rate in a region by developing spatial bayesian statistics. The methods developed in this research include Simultan Autoregressive (SAR), Conditional Autoregressive (CAR), Geographically Weighted Regression (GWR), Small Area Estimation (SAE) and hotspot detection. Based on the SAR Bayes model it is shown that the percented of people not graduating elementary school has a significant effect on poverty rate. While the increase of spatial autocorrelation will influence the poverty rate by 0.10 in East Java. Beside that by using hierarchical bayes logit normal model with nearest neighboor spatial weighted found that 40.93% of families of Jember is considered poor. Keywords: bayes, East Java, poverty, spatial
Identifikasi Perubahan Mutu Selama Penyimpanan Buah Manggis Menggunakan Near Infra Red Spectroscopy Sutrisno, .; Purwanto, Yohanes Aris; Darmawati, Emmy; Syaefullah, Enrico
Jurnal Ilmu Pertanian Indonesia Vol 17, No 2 (2012): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

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Abstract

One of quality changes during storage of intact mangosteen fruit is firmness. This occurrence was predicted to have associate with moisture content in the pericarp. The objective of this research was to determine the correlation between moisture content and firmness, and to predict moisture content changes based on reflectance spectrum of near infra red (NIR). The correlation between moisture content and firmness at 13 °C is y = 0.07972x2 – 9.833x + 305.9 while at room temperature showed y = 0.1207x2 – 14.89x + 460.8; in which y refers to firmness and x refers to moisture content in pericarp. The calibration and validation evaluation using partial least square of moisture content resulted in NIR and oven method showed that the magnitude of r is 0.758-0.882; RMSEC and RMSEP is 0.09-0.39%; CV<5% is at 2.5-3.3%. Moisture content prediction using NIR reflectant spektrum is y (temperature:8 °C) = -0.057x + 65.14; y (temperature 13 °C) = -0.253x + 64.96; y (room temperature) = -0.421x + 64.76. Keywords: chilling injury, mangosteen, near infra red, partial least square, storage quality  
Analisis Rasio Energi Daur Ulang Panas pada Produksi Biodiesel Secara Non-Katalitik Tambunan, Armansyah Halomoan; Furqon, .; Joelianingsih, .; Araki, Tetsuya; Nabetani, Hiroshi
Jurnal Ilmu Pertanian Indonesia Vol 17, No 2 (2012): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

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Abstract

Energy consumption in non-catalytic biodiesel production is still high, and needs to be reduced to the optimum level. It can be accomplished by recirculating the heat being used in the process by using heat exchanger. The objective of this study is to analyze the energy ratio of the system as influenced by the heat recirculation through a heat exchanger. This experiment used a superheated methanol vapor method for non-catalytic biodiesel production. The study was started with the determination and calculation of physical and thermal properties of materials to be used (palm olein, methanol, and methyl ester), continued with the designing of the heat exchanger, the experiment itself, and the energy ratio analysis. The process was occured in semi-batch mode with 3 levels of methanol flow rate, i.e., 1.5, 3.0, and 4.5 mL/minute, at reaction temperature of 290 °C. The results show that heat recirculation by using heat exchanger can increase the energy ratio from 0.84 to 1.03, according to the definition that energy ratio is the ratio between energy content of the biodiesel to the total energi of the feedstock and the process energy. If the energy ratio is defined as the ratio between the increase in energy content of the biodiesel from its feedstock to the process energy, the energy ratio was found to be 7.85, 2.98, and 2.87 for the respective methanol flow rate of 1.5, 3.0, and 4.5 mL/min. Keywords: biodiesel, energy ratio, heat exchanger, non-catalytic, superheated methanol vapor
Rancang Bangun Sistem Insentif untuk Meningkatkan Pendapatan Petani, Efisiensi Penggunaan Air dan Ketahanan Pangan Juanda, Bambang
Jurnal Ilmu Pertanian Indonesia Vol 17, No 2 (2012): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

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Abstract

Increasing productivity of rice generally depends on a variety of additional inputs. Various systems are designed for farmers to increase incomes and improve land productivity. SRI method is a potential technology to increase rice production management based on the cultivation of land, plants and water through the empowerment of groups and local knowledge-based eco-friendly activities. The application of SRI method requires a study of innovation adoption and optimal strategies for farmers. This study uses institutional descriptive analysis; LFA (Logical Framework Analysis) and experimental economics. The results showed that (1) The role and focus of government institutions is an increase in production through the application of various technologies. Performance of local institutions have an important a role of cultivation introduction and depends on the active community leader or head of the farmer or P3A Mitra Cai; (2) Incentives system for farmers in the application SRI paddy method is marketing insurance with favorable price, (3) the application of SRI paddy cultivation requires strengthening group farmer and P3A Mitra Cai in regulating water, organic agricultural input and marketing of products through the application of water fee rates (ipair) based on fair remuneration system; and (4) the incentives for farmers to encourage the application of SRI paddy cultivation is the provision compensation if there is a decrease in production. The existence of information on SRI Method have real impact. Keywords: food security, SRI (System of Rice Intensification), water efficiency
Karakterisasi Morfologi dan Fisiologi untuk Mendapatkan Marka Morfologi dan Fisiologi Padi Sawah Tahan Kekeringan (-30 kPa) dan Produktivitas Tinggi (> 8 ton/ha) Sulistyono, Eko; Suwarno, .; Lubis, Iskandar
Jurnal Ilmu Pertanian Indonesia Vol 17, No 2 (2012): Jurnal Ilmu Pertanian Indonesia
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Abstract

This study aims to obtain strains of drought-resistant rice with productivity more than 8 tons/ha, get critical point of soil moisture for drought-resistant rice and obtain morphological and physiological markers for drought-resistant rice. The First year researh consisted of the first experiment was arranged in a randomized block design consisting of two factors with three replications. The first factor is the frequency of irrigation is irrigation every 4, 8, 12, and 16 days. The second factor is 5 strains of rice paddies. The second experiment was arranged in a Split Plot design. The first factor as the main plot is composed control drought stress (irrigation every 2 days until the high pool of 2.5 cm) and drought stress (irrigated when soil water potential at between -30 kPa to -35.9 kPa). The second factor subplot was 100 rice strains to be selected for resistance to drought stress. The second year research was the main plot is composed of control (irrigation as farmers usually do) and drought stress (irrigated when soil water potential reached -30 kPa) and sub plot were 8 rice strains and 4 comparator varieties. Results of experiment is a critical point soil water potential of -35.9 kPa, Drought tolerant lines and production of ≥ 8 tons / ha by 8 lines of strain B12493C-MR-11-4-4, B11598C-TB-2-1-7-MR-4, TB155J-TB-MR-3, TB155J-TB-MR-3-2, B12476G-MR-20, B 12498C-MR-1-1-6, B12825E-TB-1-24, and B11598C-TB-4-1-1. The number of tiller and proline content were a marker of morphology and physiology of drought-resistant rice. Drought tolerant low land rice (-30 kPa) with high productivity (> 8 tons/ha) at farmer’s land condition were B11598C-TB-2-1-7-MR-4, TB155J-TB-MR-3, and TB155J-TB-MR-3-2. Keywords: law land rice, drought tolerant, morphological marker, physiological marker, proline
Pengembangan Pupuk Cair Nitrogen Berukuran Nanometer untuk Meningkatkan Efisiensi Pemupukan Saprudin, Deden; Gulamahdi, Munif; Hartatik, Wiwik; Darusman, Latifah Kosim; Nuraisyah, Ilfa
Jurnal Ilmu Pertanian Indonesia Vol 17, No 2 (2012): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

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Abstract

Conventional utilization of urea just has absorbed 30-60%. Remaining, 40-70% lost to environment, give not economic benefit and serious problem in environment. The use of less efficient urea has received attention lately. One way to overcome the problem of inefficiency of urea fertilizer use is a nano-sized fertilizer. Synthesized nanofertilizer in this study were nanomagnetit (Fe3O4). Nanomagnetit synthesized from FeCl3 as a source of iron, sodium citrate as the reductant, and urea as a source base. Nanomagnetite synthesized using a hydrothermal method. Based on the results of X-ray diffraction, the nanomagnetit has average crystal size 46.66 nm and crystal structure is Face Center Cubic. Energy-dispersive X-ray spectroscopy shows constituent elements in nanomagnetite are iron (29.45%), oxygen (53.07%), carbon (14.86%), and sodium (2.62%). This shows the iron and oxygen is the main constituent elements nanomagnetite. In the process of magnetite formation absorbed urea by 30% with N content (0.14%) and most are in the liquid synthesis (0.82%) so that it can be used as fertilizer on crops. Based on this research, variations of pH (6-8) liquid fertilizer provided no significant effect. The addition of 0.15 g nanomagnetite have better growth among other treatments.  Keywords: corn, hydrothermal, magnetite, nanofertilizer, urea
Desain Kelembagaan Usaha Hutan Rakyat untuk Mewujudkan Kelestarian Hutan dan Kelestarian Usaha dalam Upaya Pengentasan Kemiskinan Masyarakat Pedesaan Hardjanto, .; Hero, Yulius; Trison, Soni
Jurnal Ilmu Pertanian Indonesia Vol 17, No 2 (2012): Jurnal Ilmu Pertanian Indonesia
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Abstract

People forests in Java, have been around since 1950s, and it has been sustaining naturally following the market without any intervention. Nowadays, it keeps developing, with the increase in market demand and wood processing industry. People forest system consists of four sub-systems, those are: production, processing, marketing, and institutional sub-systems, which are simultaneously and dynamically interrelated in a system. The institutional sub-system requires collaborative arrangement that involves many parties. The objectives of the study were: 1) to identify knowledge, actors/networks, and interest/dynamic of people forest, 2) to analyze policy space of people forest management, and 3) to make a design of a people forest institution. The results showed that 1) The knowledge in people forest business came from families, neighbors, and government programs, 2) Actors of people forest agribusiness consisted of primary and secondary actors, 3) Cooperative relationship among actors of people forest business was mainly in the interest of gaining profit for each party,and 4) Institutional designs aimed at solving problems in policy space of people forest management. Keywords: business sustainability, discourse, forest sustainability, institutional, people forest
Spesies Nematoda Puru Akar (Meloidogyne spp.) yang Berasosiasi dengan Penyakit Umbi Bercabang pada Wortel: Penyakit Baru di Indonesia Supramana, .; Suastika, Gede
Jurnal Ilmu Pertanian Indonesia Vol 17, No 2 (2012): Jurnal Ilmu Pertanian Indonesia
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Abstract

Diseases and pests is one of the main obstacles in the cultivation of carrots in Indonesia. One of the emerging diseases that cause significant losses is branched (forked) tuber caused by root knot nematodes (RKN), Meloidogyne spp. Research aimed to identify the species of RKN was carried out by taking samples of diseased plants and soil from the carrot plantation in four vegetable production centers on the island of Java, namely: (1) District Pacet, Cianjur, West Java, (2) Dieng Plateau, Central Java, (3) Kopeng, Central Java and (4) District Bumiaji, Kota Batu, East Java. Three carrot plantations with different altitude / elevation were sampled for each area involved. NPA species identification was done by observation of perineal pattern (fingerprint-like pattern) of females and PCR of nematodes r-DNA ITS. Four Meloidogyne species, namely M. arenaria, M. hapla, M. incognita, and M. jananica, were identified from West Java, Central Java and East Java samples, whereas M. fallax found only in West Java. Keywords: carrots, root branching, species Melidogyne

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