Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy)
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Pengaruh Kombinasi Zeolit, Serbuk Gergaji, dan Pasir sebagai Media Tumbuh Rumput Bermuda (Cynodon dactylon Cv. Tiffdwarf) terhadap Kualitas Fungsionalnya
No full textThe objective of the study is to investigate the effect of the mixture of sow dust, zeolit, and sand as media on turf qualities of Bermuda Grass (Cynodon dactylon var. Tiffdwarf). There are 6 treatments of planting media including : sand 100%, sand 75 % + saw dust 25 % + zeolit 0 %, sand 50 % + sow dust 50 % + zeolit 0 %, sand 50 % + sow dust 25 % + zeolit 25 %, and sand 50 % + sow dust 0 % + zeolit 50 %. The treatment have 3 replication ang arranged in Randomized Block Design. Analysis of media show the addition of sow dust 25 - 50 % into sand media increased physical qualities of media including the increasing of the water content of media and decreased bulk density of the media. The addition of sow dust 25 % into sand media perform the best qualities of turf compared to the other media including of dry weight of shoots, density of shoot, height of shoot, length of root and the shoot - root ratio.
PENGARUH IAA DAN GA3 TERHADAP PERTUMBUHAN VEGETATIF BIBIT ANGGREK DENDROBIUM Walter Ouemae 4N x Singapore White
Get PDFThe objective of the experiment was to study the effect of lAA and GA3 on vegetative growth of Dendrobium orchids. The experiment was carried out using 10 months-old orchid plants, and consists of two treatments, one with lAA of 0, 30, 60, and 90 ppm and the other with GA3 of and 100 ppm. The experiment was conducted at Baranang Siang Research Centre of Bogor: Agriculture University. Each treatment was replicated three times. Data were taken on number of leave, height, leaf size, number of roots, and number of pseudobulbs. Application of IAA up to 90 ppm increased the number of leaves, leaf size, height, number of roots and number of pseudobulbs. Application of 100 ppm GA 3 increased number of leaves and number of roots. Application of 90 ppm IAA combined with 100 ppm GA3 significantly increased number of roots and leaf size of orchid plants
PENGARUH KAPUR TOHOR UNTUK EKSTRAKSI BENIH TERHADAP VlABILITAS BEIH MANGGIS (Garcinia mangostana L
Get PDFThe objectives of this experiment were to evaluate the possibility of using quick lime for extraction of mangosteen seed and the effects on its viability; The experiment was done in Seed Science and Technology Laboratory, Greenhouse, Bogor Agriculture University from November 1997 until February 1998. The materials were taken from smallholder plantation in Jasinga, Bogor. The treatments were arranged factorial in a group randomized block design with two factors. The first factor was 6 levels of quick lime concentration (K) : 0 g/l, 10 g/l, 15 g/l, 20 g/l, 25 g/l, 30 g/l and the second factor was 4 levels of soak periods: 0 minute, 10 minutes, 20 minutes, 30 minutes. The experiments had 24 treatments combination with 4 replicates so there were 72 experiment units. The data show that seed extraction using quick lime gave statistically significant different results compared with seed extraction without using quick lime and so the soak periods compared with no soak. Interaction between 20 g/l quick lime concentration and 30 minutes soak period gave the best seed emergence (96 %). 20 g/l quick lime concentration save higher vigour than other concentration as measured from its speed of germination, spontaneous growth, and root length. The soak periods increased seed moisture content 30 minutes soak period resulted higher viability and vigour than other soak periods as measured from its normal seed dry weigh, spontaneous growth, epycotyl length and root length
PENGARUH KONSENTRASI DAN SELANG WAKTU PEMBERIAN EFFECTIVE MICROORGANISMS 4 (EM-4) TERHADAP PERTUMBUHAN DAN HASIL TANAMAN KAPAS (Gossypium hirsutum L.)
Get PDFThe objective of this experiment is to study the effect of concentration and application interval of EM4 on growth and yield of cotton. The experiment was held in KP Sindangbarang Bogor from March to August 1996, using RCD with two factors and three replications. The first factor was EM4 concentration which were 0 ml L-1 water, 5 ml L-1 water, 10 ml L-1 water, 15 ml L-1 water, and 20 ml L-1 water. The second factor was application interval which were 5, 10, and 15 days. The result shows that the concentration of 5 ml L-1 water significantly affected the vegetative growth. But in the contrary, application interval and its interaction do not give the similar effect. The generative growth were significantly affected by concentration and application interval and its interaction. The best combination for maximum cotton yield is in concentration of 5 ml L-1 water and application interval 10 days, and for maximum seeded cotton yield is 5 ml L-1 water and 15 days
PENGARUH APLIKASI GA3 TERHADAP PEMBUNGAAN TANAMAN Anthurium andreanum cv. AVO CUBA
Get PDFThe objective of the research was to determine the effect of GA3 application on the flowering of Anthurium andreanum cv. Avo Cuba. The experiment consisted of two factors namely dosage and frequency of application: once or twice with one half dosage each. The result showed that GA3 increased leaf area, length of flower stalk, and the number of flower produced, shortened the time of flower emergence and harvest date. GA3 did not influence flower size and vase life. The frequency of application had no effect on Anthurium flowering. There was no interaction of dosage and frequency of application. Dosage of GA3 at 10 mg per plant gave good effect on reproductive characteristics
EVALUASI PENAMPILAN KARAKTER HORTIKULTURA BEBERAPA GENOTIPE JAGUNG DAN POTENSINYA UNTUK DIKEMBANGKAN SEBAGAI JAGUNG SEMI (Baby Corn)
No full text The objective of this study was evaluate horticultural performance of several maize genotypes and their potential to be developed as baby corn. The experiment was conducted at Sindangbarang Experimental Station of Bogor Agricultural University Bogor, from April until June 1995. The design used was randomized complete block design (RED) with three replications. Fifteen genotypes consisted of local maize (8 numbers), improved variety (3 numbers) and introduction (3 numbers) were evaluated with CP1-1 hybrid which has been usual in producing baby corn was used as control variety. The result showed that the introduced genotypes CM-90 and SPLC6 gave highest number of baby corn with yield of 2.60 ear per plant (equivalent to 3.04; ton/ha) and 2.20 ear per plant (equivalent to 3.04 ton/ha), respectively, while CP1-1 hybrid only produced 1.80 ear per plant (equivalent to 1.72 ton/ha). Therefore, CM-90 and SPLC6 were found to have higher yield of marketable baby corn than the control variety. Considering days to harvest of baby corn, CM-90 (56.05 dap)was found earlier than SPLC6 (61.60 dap)
TOLERANSI TANAMAN KEDELAI TERHADAP CEKAMAN AIR : AKUMULASI PROLIN DAN ASAM ABSISIK DAN HUBUNGANNYA DENGAN POTENSIAL OSMOTIK DAUN DAN PENYESUAIAN OSMOTIK
Get PDFIn this experiment. the changes on leaf osmotic potential and accumulation of proline and abscisic acid were identified from drought-tolerant and drought - sensitive soybean genotypes. Three drought - tolerant (Mlg 2805, Mlg 2984 and Mlg 2999) and two sensitive soybean genotypes (Mlg 2510 and Mlg 3541) were subjected to drought condition created by regulating water supply in greenhouse. The results revealed that exposing plants to drought stress brought about a decrease of leaf osmotic potential. The decrease of which was greater in drought-tolerant genotypes (6.91 to 10.11 bars) than in sensitive genotypes (0.55 to 0.69 bars). The decreasing of leaf osmotic potential was followed with increasing praline accumulation, especialy for Mlg 2805. Only Mlg 2805 showed the significant ABA accumulation when the plants were subjected to drought stress. It is suggested that the drought tolerance was associated with the reduction of leaf osmotic potential (osmotic adjusment) in which proline might play an important role. The role of ABA could not be clarified since there had been a great variability in ABA content of all tolerant genotypes
PENGARUH TINGKAT KEMASAKAN BENIH DAN METODE KONSERV ASI TERHADAP VIGOR BENIH DAN VIGOR KACANG JOGO (Phaseolus vulgaris L.)
Get PDFThe purpose of this experiment was to investigate the effect of various levels of seed maturity and conservation methods on seed vigor and seedling vigor of broad bean( Phaseolus vulgaris L.). The experiment was conducted at Darmaga IV Experimental Station, seed Science and Technology Laboratory - Leuwikopo IPB and BIOTROP, Tajur. Broad bean no. 1058 was used in this experiment. Seed vigor testing was carried out in the laboratory, using Completely Randomized Design, while Randomized Complete Block Design was applied to field experiment for testing seedling vigor. The treatment consisted of two factors as followed:(I) Levels of seed maturity: MI = 27 daf (days after flowering), M2 = 30 daf, M3 = 33 daf, M4 = 36 daf, and M5 = 39 daf (2) Conservation methods: K 1 = pods were spread out in the processing unit room for about 1 week, the seed moisture content was dropped to 40%; K2 = sun drying; K3 = artificial drying, using seed dryer 400C. Seed moisture content was dropped to 9 - 10% in K2 and K3 methods. Broad bean seeds harvested at 36 daf, the time when physiological maturity was reached, followed by either sun drying or artificial drying, showed a maximum seed vigor. However, a higher seedling vigor resulted from sun drying as compared to artificial drying. Before physiological maturity seed vigor and seedling vigor was still lower, while the vigor was reduced after physiological maturity
Interaksi Genetik x Lingkungan dan Stabilitas Komponen Hasil Berbagai Genotipe Kedelai di Provinsi Riau
Get PDFGenotype by environment (GE) interaction and stability of a trait in any crop plant such as soybean (Glycine max L. Merr.) are very important for plant breeders to develop and evaluate the new cultivars as well as for farmers to plant suitable cultivars for commercial purpose. Crop performances including harvesting date, yield components and grain yield of nine genotypes of soybean were evaluated at three locations with distinct environments in Riau. The data were used to determine GE interaction variance components of the traits and yield stability. There was significant effect of location on all characters except on grain yield per plot. The genotypes differed significantly in all yield components and grain yield. Genotype x environment interaction significantly affected several crop performances such as harvesting date, all yield components and grain yield. The magnitude of GE interaction variance component was greater than that of location for all traits except the number of seed per plant indicating that most genotypes performed differently across the locations and were not stable with respect to the locations. Among the nine genotypes, line 19BE and Malabar are classified as stable genotypes and could be grown in wide area of Riau Province, while line 13ED and Kipas Putih produced high grain yield in specific area and could be only grown in Pekanbaru. Keywords: genotype x environment interaction, yield components, stability, soybean
Respon Rumput Benggala (Panicum maximum L.) terhadap Gypsum dan Pupuk Kandang di Tanah Salin
Get PDFThe research was aim at studying the effect of application of gypsum and manure to growth, biomass yield, dry matter yield, dry matter content and crude protein of Benggala grass. This study used factorial design with nine replications. The first factor was manure dosages i.e. 0 and 20 ton ha-1. The second factor was gypsum dosages i.e. 0, 0.75, 1.5 and 3 ton ha-1. Variables to observe were relative growth rate (RGR), biomass yield, dry matter yield, dry matter content and crude protein. The application of 20 ton manure and 3 ton gypsum per hectare resulted the highest values of RGR, biomass yield, dry matter yield, dry matter content and crude protein; they were 0.86 g day-1, 1039.4 g pot-1, 219.1 g pot-1, 20.9% and 8.1%, respectively. Response of RGR, biomass yield, dry matter yield, dry matter content and crude protein to gypsum application with 20 ton manure ha-1 were linier. Keywords : benggala grass, saline soil, gypsum, manure, nitrogen