Buletin Agrohorti
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Perubahan Klorofil, Luas Daun Spesifik, dan Efisiensi Penggunaan Cahaya Ubi Kayu pada Sistem Tumpang Sari dengan Jagung
Get PDFThis study aims to determine changes in chlorophyll content, specific leaf area (SLA), and light use efficiency (LUE) as a mechanism of physiological and morphological adaptation of cassava intercropped with maize. Cassava variety of Adira 1 has been planted in intercropping with maize varieties of Arjuna, Pioner 4, and Cargill 9 (with a population of 32,000; 48,000; 64,000, and 8,0000 plants ha-1); cassava is planted between rows of maize with a distance of 1 m x 1 m (with a population of 10 000 plants ha-1). As a physiological adaptation mechanism, cassava which is planted intercropping increase light capture for photosynthesis by increasing the content of chlorophyll a and chlorophyll b as well as morphologically with increasing SLA. The average chlorophyll a and b of cassava in intercropping were 2.758 and 1.125 mg g-1, whereas in monoculture were 2.032 and 0.750 mg g-1 or increased respectively 35.73% and 50.00%. SLA of cassava increased from 309.5 cm2g-1 in the monoculture became 406.3 cm2g-1in intercropping (increased by 31.27%). The LUE of cassava at the beginning of growth during intercropping with maize is lower than the monoculture, but after maize is harvestedthe LUE increased so that the average LUE of cassava is the same during the whole periode of growth that is 0.0025 kg MJ-1.Keywords: mechanism, physiological, morphological, adaptatio
Keragaman Pertumbuhan dan Produksi Beberapa Aksesi Jarak Pagar (Jatropha curcas L.) di Daerah Pesisir Pantai
Get PDFThe aim of this research was to know the growth various accesions of physic nut in coastal area. This research was conducted from March until October 2011 at Wonokerto Kulon coastal area, Pekalongan. The evaluated accesion were derived from 14 selected parent plants originated from Central Java, South Sulawesi, West Java and West Nusa Tenggara. The accesions were selected based on provenance trials in the previous research. The seeds were germinated in the seed nursery. The seedlings were planted in to the field (8 WAP). This research was arranged in randomized complete block design. The result of this research showed that Bogor 80-11-5 and IP-2P 110-1-4 are the best accesion. Bontomaramu 1-1, Medan and Pinrang. Sukabumi, Bengkulu 3, Gunung Tambora, Lombok 59-1-2, Aceh Besar, Bima, Bone, Dompu and Luwu Utara are not good to be planted in coastal area.Keywords: accesion, physic nut, coastal are
Peningkatan Produktivitas dan Efisiensi Konsumsi Air Tanaman Bayam (Amaranthus tricolorL.) pada Teknik Hidroponik melalui Pengaturan Populasi Tanaman
Get PDFThe purpose of the research was to study the effect of plant population on productivity and water consumption of amaranth in hydroponic technique. Research was conducted in Parung Farm, Bogor, from April to May 2011. The research used Nutrient Film Technique (NFT) hydroponic system that modificated with gravel as its planting medium. The research was arranged in Randomized Complete Block Design with one factor, i.e. , 1, 2, 3, or 4 seedling numbers per hole. The research was divided into two experiment. The first was experiment to study the effect of plant population on plant productivity, and the second was experiment to study the effect of plant population on water consumption of plant. The result showed that plant with one seedling in the planting hole gave the best response on growth of amaranth (plant height, leaves numbers), but for plant productivity, the best result was obtained from plant with three seedlings in the planting hole. Water consumption was highest in plants with one seed per planting hole. Apparently, the more the population, the less consumption of water is needed. This is due to poor root conditions in densely populated. Plant roots will adversely affect the absorption of water.Keywords : gravel, hydroponic kit, seedling numbers, the planting hol
Pertumbuhan dan Produksi Dua Varietas Tomat (Lycopersicon esculentumMill.) secara Hidroponik dengan beberapa Komposisi Media Tanam
Get PDFThe objectives of this researchwasto determine the effect of growing media composition on growth and production of two varieties of tomatoes in a hydroponic system. The research used Randomized Complate Block Design (RCBD) with two factors, they were tomato varieties and growing media composition. The tomato varieties were (Arthaloka, Permata) and growing media compotition were 100% husk (v/v), 75% husk + 25% bamboo leaves compost (v/v), 50% husks + 50% bamboo leaves compost (v/v), 25% husk + 75% bamboo leaves compost (v/v), and 100% bamboo leaves compost (v/v). Permata variety better than Arthaloka variety, based the higher number of flower and flower bunches, number of fruit, weight of fruit and grade of fruit. Bamboo leaves compost increased heigh of plant at 2-5 week after transplanting (WAT), number of leaves at 2-4 WAT, number of flower at 4-5 WAT, and 7-8 WAT, and number of flowers bunches at 5–11 WAT. The used of bamboo leaf compost 50% (v/v) and 75% (v/v) increased fruit number of tomato Permata variety at 7 WAT.Keywords: rice husk, bamboo leaf compost, hydroponics, tomato productio
Pematahan Dormansi Benih Kelapa Sawit (Elaeis guineensisJacq.) dengan Perendaman dalam Air Panas dan Variasi Konsentrasi Ethephon
Get PDFThis research was held from April to July 2012, located in the seed processing unit of PT Astra Agro Lestari Tbk, Central Borneo. The study consisted of three experiments, the first experiment to determine the effect of water temperature and immersion intensity of seed germination. The first experiment used completely randomized design (CRD) factorial with two factors, water temperature: 27, 60, 70, 80, 90oC and immersion intensity: 1x24, 2x24, 3x24 hours. The second experiment used a single factor of CRD namely ethephon concentration: 0, 0.4, 0.8, 1.2, 1.6%. The third experiment was a continuation from the second experiment with the adding heat drying treatment during a week. The result showed that 3x24 hours soaking treatment in 80oC hot water increased the germination, soaking in ethephon 0.4% inhibited radicle growth resulted abnormal seedlings. Soaking seed in 80oC hot water for 3x24 hours and followed by ethephon and then heat drying treatment for a week increased germination (52.0% maximum growth potential) but still ineffective to break seed dormancy.Key Words: breaking dormancy, ethephon, hot water treatment, oil palm seed
Daya Hasil 12 Hibrida Harapan Jagung Manis (Zea maysL. var. saccharata) di Kabupaten Maros, Sulawesi Selatan
Get PDFThe objective of this research was to evaluate yield potential of 12 sweet corn promising hybrids from Plant Breeding Program (Bogor Agricultural University) and Indonesian Cereals Research Institute colection. This research was conducted at experimental field Indonesian Cereals Research Institute, in Maros, South Sulawesi, from June to August 2011. The genotypes used were : IM-12, IM-13, IM-14, IM-15, IM-16, IM-23, IM-24, IM-25, IM-34, IM-35, IM-45, IM-55, and three comercial varieties i.e. Super Sweet Corn, Sweet Boy, and Talenta. The design of this research was Randomized Complete Block Design with four replications. Data was analyzed with F-test then continued with Dunnett test (α=5%). Selection index was used for choosing the best genotype. Interaction between two factors, i.e. genotype and year, was analyzed with combined variance analysis using primary data from this research and secondary data from last year research (done from April to June 2010). Broad sense heritability was estimated from this two-factors analysis. The result from this research was the sweet corn productivity was not affected by genotype, but affected by genotype and year interaction. On the other hand, total soluble solid was affected by genotype, but not affected by interaction between genotype and year. Among characters evaluated, total soluble solid had highest broad sense heritability. Based on selection index, IM-16 was a promising hybrid and can be developed to be new commercial variety.Keywords: yield trial, sweet corn hybrid, selection index, broad sense heritabilit
Perlakuan Coating dengan menggunakan Isolat Methylobacterium spp. dan Tepung Curcuma untuk Meningkatkan Daya Simpan Benih Padi Hibrida
Get PDFThis research aims to study the effect of coating on seed storability in three varieties of hybrid rice. The research conducted at Centre for Soil Research, East West Corporation in Purwakarta and Laboratory of Seed Science of Department Agronomy and Horticulture, Faculty of Agriculture, Bogor Agricultural University.This experiment arranged in nested plot design in which formulation of seed coating (uncoated seed, TDJ-7, TD-TPB3, TD-TM1 and Curcuma flour) was nested in six times period of storage. The result showed that coated and uncoated seed still had high viability after storage 15 weeks for 3 varieties of hybrid rice seeds (DG-1 SHS, SL-8 SHS and INTNANI-2). Methylobacteriumspp. strain TD-TPB3 and TD-TM1 showed to be the best coated for hybrid rice seeds.Keyword :Curcuma, Methylobacteriumspp., storage, viability
Pertumbuhan dan Produksi Buncis Tegak (Phaseolus vulgaris) pada beberapa Kombinasi Media Tanam Organik
Get PDFMedia selection is one of important factor for the growth and production of erected kidney bean (Phaseolus vulgarisL.). Utilization the waste media of white oyster mushroom (Pleurotus ostreatus) and waste media of paddy straw mushroom (Volvariella volvaceae), cow manure, and rice husk as plant growth media for kidney bean can be used for optimizing the utilization of local resources and minimizing environmental damage as well as to support the codification of GAP (Good Agricultural Practices) of kidney bean. The research was done from February until October 2011 in experiment field at Leuwikopo, IPB, Bogor. The experiment consisted of one factor and arranged in Randomized Complete Design with thirteen combinations from five kinds of organic media component, they were soil, waste media of white oyster mushroom, waste media of paddy straw mushroom, cow manure, and rice husk with 1:1 ratio (v/v). The kidney bean showed good responses to the combination media treatment of cow manure, combination of soil and waste media of paddy straw mushroom, combination of soil, waste media of paddy straw mushroom, and cow manure, and combination of soil, waste media of paddy straw mushroom, cow manure, and rice husk. How ever the best result of kidney bean production was given from waste media of paddy straw mushroom treatment.Keyword: erected kidney bean, plant growth media, waste media of paddy straw mushroom, co w manur
Pengaruh Jenis Pupuk dan Dekomposer terhadap Pertumbuhan dan Produksi Padi Organik
Get PDFThe objective of the research was to study the effect of fertilizer types and decomposer on growth and yield of organic rice Field experiment was carried out in Cikarawang, Dramaga, Bogor from November 2011 to March 2012. The experiment used factorial-randomized complete block design with fertilizer combinations (15 ton chicken manure ha-1and 5 ton Tithonia diversifolia ha-1, 10 ton chicken manure ha-1 and 5 ton T. diversifolia ha-1, and 10 ton chicken manure ha-1 and 5 ton rice straw ha-1) as the first factor and decomposer application (using decomposer and without decomposer) as the second factor. Organic fertilizer types significantly affected root wet weight, nutrient content of P and K in leaves. Rice yields were not significantly different with fertilizer combinations 15 ton chicken manure ha-1 and 5 ton T. diversifolia ha-1, 10 ton chicken manure ha-1 and 5 ton T. diversifolia ha-1, and 10 ton chicken manure ha-1 and 5 ton rice straw ha-1, they were 2.28, 2.22, and 2.16 ton dry seed ha-1, respectively. Decomposer application significantly affected the number of tillers at 8 week afterplanting, leaf color at 5 weeks after planting, nutrient content of P in leaves and panicle length. Rice yield with decomposer application and without decomposer were 2.25 and 2.19 ton ha-1, respectively, and they were not different.Keywords: chicken manure, decomposer, organic rice, rice straw, Tithonia diversifoli
Daya Hasil 15 Galur Cabai IPB dan Ketahanannya terhadap Penyakit Antraknosa yang Disebabkan oleh Colletotrichum acutatum
Get PDFThis research intended to evaluate the yield of 15 IPB chili pepper lines from Plant Genetics and Breeding Division, Department of Agronomy and Horticulture, IPB, and was compared then with 5 commercial varieties. This research also intended to evaluate its resistance to anthracnose. This research was done from January until July 2011 at Bogor. The main character that evaluated was yield component and resistant to character. IPB019015, IPB110005, IPB120005, IPB009019, IPB002046, and IPB001004 had yield ability better than commercial varieties. IPB019015 had resistance to anthracnose disease better than commercial varieties.Keywords: anthracnose, chili, yield componen