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All Journal Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy)

Sugiyanta ,

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

Author-ID : 206068

Agriculture, Biological Sciences & Forestry Economics, Econometrics & Finance

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Articles

Peran Bakteri Penambat Nitrogen untuk Mengurangi Dosis Pupuk Nitrogen Anorganik pada Padi Sawah Widiyawati, Ida; ,, Sugiyanta; Junaedi, Ahmad; Widyastuti, Rahayu
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 42 No. 2 (2014): Jurnal agronomi indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

ABSTRACTThe availability of nitrogen in soil is one of the limiting factors to support growth and rice productivity. Nitrogen-fixing bacteria have ability to utilize air nitrogen so it becomes available in the soil. The use of nitrogen-fixing bacteria could potentially reduce application of nitrogen fertilizer. The aim of the experiment was to determine the role of nitrogen-fixing bacteria in reducing inorganic N fertilizer on lowland rice. The research was conducted in April-August 2012 at the plastic house of Babakan Sawah Baru Experimental Station, IPB. The experiment was arranged in randomized block design with two factors, namely nitrogen fertilizer and type of bacteria. The dosage of N fertilizer (urea), i.e. 0, 50, 75 and 100 kg N ha-1. The types of bacteria, i.e. without bacteria, Azotobacter-like, Azospirillum-like, and consortium. The result of the experiment showed that N fertilization significantly affected to all variables except the percentage of empty grains per panicle, 1,000 grain weight, and N content of plant. The types of bacteria significantly affected to root dry weight, number of filled grain per panicle, greenness of leaf, uptake and content of nitrogen (shoot and grain), grain weight per plot. Consortium of bacteria were capable to reduce 25% the use of inorganic N fertilizer from recommendation doses (100 kg N ha-1) that based on the value of agronomic effectiveness.Keywords: Azospirillum-like, Azotobacter-like, consortium of bacteria

Karakter Morfofisiologi dan Fisikokimia Beras dengan Berbagai Dosis Pemupukan Organik dan Hayati pada Budidaya Padi Organik Tustiyani, Isna; ,, Sugiyanta; Melati, Maya
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

ABSTRACTThe awareness of the negative impacts of conventional agriculture has been encouraging people to switch from conventional farming to the organic farming, using organic and biological fertilizers. This farming system changes will influence the character of the plant and the yield. The objective of the research was to investigate the morphophysiology and physicochemical characters of rice with various rates of organic and biological fertilizer. The experiment was conducted at rice field in Karawang and Bogor, West Java, from May to September 2012. The experiment used a single factor randomized block design consisted of three replications with 12 treatments. The first 6 treatments were 0, 2, 4, 6, 8, 10 ton organic fertilizer ha-1, and the other 6 treatments were 0, 2, 4, 6, 8, 10 ton organic fertilizer ha-1 combined with 2 l biological fertilizer ha-1. As control treatment was application of anorganic fertilizer with the rate of 400 kg NPK (30-6-8) ha-1. Plot size was 15 m x 10 m, with a double row spacing (legowo 2:1) (25 cm x 15 cm x 50). The results showed that organic fertilizer either without or with biological fertilizers increased the weight of 1,000 grains and decreased amylose content of rice. The score of leaf color in plants with inorganic fertilizer was higher than those with organic fertilizer.Keywords: amylose, gelatinization temperature, leaf color, water uptake ratio, 1,000 grain weight

Peran Pupuk Organik dalam Peningkatan Efisiensi Pupuk Anorganik pada Padi Sawah (Oryza sativa L.) Siwanto, Totong; ,, Sugiyanta; Melati, Maya
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

ABSTRACTApplication of organic fertilizer into the soil is designated as a source of macro, micro nutrients and organic acids; it also acts as soil ameliorant that improve physical, chemical and biological properties of soil. Application of high rates organic fertilizer has a constraint namely the availability and ease of application. Therefore, it is necessary to learn the use of organic fertilizer with low rates to improve the efficiency of chemical fertilizers. This research was aimed to study the effect of organic and inorganic fertilizers on growth and yield of paddy rice, as well as the efficiency of N, P, K inorganic fertilizer. Field experiment was conducted at Sawah Baru Research Station, University Farm IPB, Bogor, West Java from September to December 2013. The experiment used Randomized Block Design consisted of two factors: rates of organic fertilizer (0, 250, 500, 750, and 1,000 kg ha-1), and rates of inorganic fertilizer (0, 100, 200, 300, and 400 kg ha-1). The results suggested that the application of 1,000 kg organic fertilizer ha-1 + 400 kg inorganic fertilizer ha-1 did not show significant interaction. Application of organic fertilizer alone up to 1,000 kg ha-1 resulted in low growth and yield. Increasing rates of application up to 400 kg inorganic fertilizer ha-1 increased the growth and yield of paddy rice. The highest N efficiency was 89.19% at a rate of 500 kg organic fertilizer ha-1 + 200 kg inorganic fertilizer ha-1, whereas the highest efficiency of P and K, respectively were 69.55% and 92.52% at a rate of 750 kg organic fertilizer ha-1 + 300 kg inorganic fertilizer ha-1.Keywords: NPK, organic fertilizer, paddy rice

Peran Pupuk Organik dalam Meningkatkan Efektivitas Pupuk NPK pada Bibit Kelapa Sawit di Pembibitan Utama Sari, Vira Irma; ,, Sudradjat; ,, Sugiyanta
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

Main nursery is the first step affecting oil palm’s age and productivity. Good plant growth will produce high quality and yield of oil palm. The demand of oil palm seedlings for extensification and replantation increases continuously, and therefore this need to be supported by precise fertilization programs. The objectives of this experiment were to investigate the role of organic fertilizer and to obtain the best organic-NPK fertilizer combination in increasing the effectiveness of the use of NPK fertilizer for the growth of oil palm (Elaeis guineensis Jacq.) seedling in the main nursery. The experiment was conducted from December 2011 to September 2012 at IPB Teaching Farm Dramaga Bogor. The treatment was arranged in a factorial randomized block design with three replications. The first factor was amount of organic fertilizer consisted of 0:6, 1:6, 2:6, and 3:6 of the soil volume (6 kg). The second factor was NPK fertilizer rates, i.e., 0.0, 127.5, 255, and 382.5 g NPK per plant. The results showed that application of organic fertilizer increased the effectiveness of NPK fertilizer and could be a substitute for NPK fertilizer in oil palm seedlings. The best combination treatment was 2:6 (organic fertilizer:top soil) and 382.5 NPK g per plant with effectiveness of 158.9, 209.1 and 170.1 % for plant height, leaf number and stem diameter, respectively. The efficiency of N, P, and K application were 56.2, 11.1, and 29.0% for the same variables, respectively. Based on morphological variables, recommended rate of an NPK compound fertilizer 15-15-15 was in the range of 396.05 g per seedling for eight months. Recommended NPK were 7.00, 12.59, 37.58, 56.41, 36.74, 87.00, 86.60, and 72.97 g per seedling for first to eighth months, respectively.Keywords: chlorophyll, fertilizer recomendation, morphological and physiological response, nutrient balance

Tanggap Tiga Varietas Padi Sawah terhadap Kombinasi Pemupukan dengan Sistem Pembenaman Jerami Herdiyanti, Tri; ,, Sugiyanta; Aswidinnoor, Hajrial
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 43 No. 3 (2015): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

ABSTRACTDegradation of soil fertility due to inaccurate application of fertilizer become one of the factors causing the stagnant rice productivity improvement in Indonesia. Straw incorporation, organic fertilizers and biofertilizers applications potentially reduces a rates of inorganic fertilizers and improves soil fertility. The aim of this study was to evaluate growth and yield of 3 lowland rice varieties (high yielding variety, new plant type, and local variety) in response to reduce NPK rates with straw incorporation, organic fertilizer, and biofertilizer in 7th planting season. The research was conducted at rice field in Karawang, West Java, from April-August 2013. The research was arranged in split plot randomized block design with 3 replications. The main plot was fertilizer application consisted of 10 treatments (combination of organic and inorganic fertilizers), while the sub plot was rice varieties (Ciherang, IPB 3S, and Mentik Wangi). The application of inorganic fertilizer, 400 kg NPK 30-6-8 ha-1, was control treatment. Plot size was 6.5 m x 10 m, with a double row spacing (25 cm x 15 cm x 50 cm). The result showed that growth of the three varieties was not significantly different so as the yield at 50% reduced NPK rate with incorporation of straw, organic fertilizer and biofertilizer. Adding of solid and liquid organic fertilizer, and biofertilizers on treatment of straw incorporation + 50% NPK rate was unnecessary due to insignificant yield increase.Keywords: Ciherang, fertilizer, IPB 3S, local variety, Mentik Wangi, new plant type

Peranan Pupuk Organik dan NPK Majemuk terhadap Pertumbuhan Kelapa Sawit TBM 1 di Lahan Marginal Sukmawan, Yan; ,, Sudradjat; ,, Sugiyanta
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 43 No. 3 (2015): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

ABSTRACTOil palm (Elaeis guineensis Jacq.) is the most efficient vegetable oil producer. It produces five to seven times more vegetable oil per hectare than the other vegetable oil producing crops. The objective of this research was to study the role of organic and NPK compound fertilizers application to one-year-old oil palm (Elaeis guineensis Jacq.) on marginal land. The research was conducted at IPB-Cargilll Teaching Farm of Oil Palm, Jonggol, Bogor, West Java from March 2013 to March 2014. The experiment was carried out as factorial experiment in a randomized block design with three replications. The first factor was organic fertilizer consisted of 0, 15, and 30 kg per palm. The second factor was NPK compound fertilizers 15:15:15 consisted of 0, 1.3 and 2.6 kg per palm. The results showed that no interaction effect between organic and NPK compound fertilizers on all of variables observed. Marginal soils in Jonggol required high rate of fertilizers to produce good performance of one-year-old oil palm. Application of 30 kg organic fertilizer per palm or 2.6 kg NPK compound fertilizers 15:15:15 per palm resulted in the highest vegetative growth of one-year-old oil palm on marginal land in Jonggol.Keywords: cow dung, critical nutrient level, slow release fertilizer, Ultisols, vegetative growth

Pemberian Pupuk Silika Cair untuk Meningkatkan Pertumbuhan, Hasil, dan Toleransi Kekeringan Padi Sawah ,, Sugiyanta; Dharmika, I Made; Siti Mulyani, dan Dedeh
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 46 No. 2 (2018): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

As one of the silica (Si) accumulator, rice (Oryza sativa L.) requires large amounts of silica for growth. This study aimed to determine the effect of liquid silica fertilizer application on lowland rice growth and yield, and its roles in drought stress responses. The experiments were conducted at Sawah Baru rice field and Cikabayan Greenhouse Experiment Station, IPB, Bogor during the period of January to May 2016. The field experiment was set up in a randomized complete block design with 7 treatments and three replications. The greenhouses experiment was arranged in a split-plot randomized block design with 3 replications. The main plots were 5 levels of liquid silica fertilizer application, while the subplot was 5 level of various soil water contents. The results of the field experiment showed that the application of liquid silica fertilizer increased rice shoot dry weight, total and productive tiller numbers, and yield per plant, but did not increase yield per hectare. Meanwhile at greenhouse experiment, it showed that the use of liquid silica fertilizer reduced the number of rice stomata, but did not increase cuticle thickness and grain yield per plant. Silica application was not effective to alter drought in rice.

Co-Authors AHMAD JUNAEDI Dharmika, I Made HAJRIAL ASWIDINNOOR Ida Widiyawati Isna Tustiyani Maya Melati RAHAYU WIDYASTUTI Siti Mulyani, dan Dedeh Sudradjat , Totong Siwanto, Totong Tri Herdiyanti, Tri Vira Irma Sari, Vira Irma Yan Sukmawan, Yan

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