Indonesian Journal of Agronomy 

About: Indonesian Journal of Agronomy is an academic journal. The journal publishes majorly in the area(s): Population & Germination. It has an ISSN identifier of 2337-3652. Over the lifetime, 611 publications have been published receiving 2584 citations.

Review : Seed Treatments Using Matriconditioning to Improve Vegetable Seed Quality

Abstract: Sowing seed of high quality is necessary for commercial crop production. Poor quality seeds will result in low field emergence and in seedlings that are less tolerant to abiotic stress, more sensitive to plant diseases, and will reduce the quality and yield of crops produced. With the use of good seeds, one gets better results with less effort and expense. High seed quality is characterized by high analytical purity. The seeds must be free of seeds of other species and varieties, weed seeds and inert matters. High vigor and germination capacity are the other characteristics of high seed quality. Another important attribute is free from seedborne disease. Vegetable farmers experience losses due to pathogen problem during plant production affected by use of infected seeds. Seed pathogens are often the primary agents responsible for low seed quality and poor stand establishment. Seed is an effective means of disease dissemination. One infected seed can infect many plants in a seedbed before they are transplanted to the field. A few infected plants in the field can provide the source of inoculum to spread the disease to other plants (AVRDC, 1990). The presence of seedborne pathogens in the seeds will either prevent the germination, or may result in disease epidemics due to transmission of the diseasecausing pathogen from seed to the plant. This will have a negative impact on the quality and yield of crops produced. Therefore, it is important to use healthy seeds from the beginning. An effort to develop various seed treatments to overcome seedborne pathogens may provide an opportunity to optimize seed quality, and improve plant stand eventually. This article is written based on the author’s research with her students studied on seed science and technology as their thesis or dissertation, particularly with emphasis on vegetable seed quality improvement. VARIOUS SEED TREATMENTS TO IMPROVE SEED QUALITY AND HEALTH, PLANT STAND AND YIELD

Induksi Mutasi pada Stek Pucuk Anyelir (Dianthus caryophyllus Linn.) melalui Iradiasi Sinar Gamma

Abstract: It has been a common knowledge that LD 50 is commonly used in estimating optimal doses of gamma irradiation in a breeding program. This research was aimed at observing radiosensitivity of five carnation's genotypes to gamma irradiation, to find the LD 50 of carnation's cuttings, and to obtain solid mutants from five numbers of Carnation. For cuttings, carnation genotype number 10.8 was the most insensitive to gamma rays, whereas number 24.15 was the most sensitive one. LD 50 of carnation's cuttings were obtained around 49 -72 gray. There were 19 mutants produced from this treatment. The desired mutans were mostly produced from the treated 24.1 genotype whereas the character mutans were mostly observed in MV2 generation. Irradiation treatment on genotype 24.1 produced most stabile mutans while the less was in genotype 24.14. The produced mutants were qualitatively different in colour and petal shape, and stabile till third generation. Key words: LD 50 , gamma irradiation, induced mutation, carnation.

Evaluasi Daya Hasil Cabai Hibrida dan Daya Adaptasinya di Empat Lokasi dalam Dua Tahun

Abstract: The aim of the experiment was to study the performance of yield components of eight pepper hybrids and their adaptation at four locations in two years (2008 and 2009). The experimental design used was Randomized Complete Block Design (RCBD), three replications as a block was nested in the location. Plant materials were eight hybrids (IPB CH1, IPB CH2, IPB CH3, IPB CH25, and four commercial hybrids were Adipati, Biola, Gada, and Hot Beauty). The IPB CH3 hybrid produced higher fruit width, fruit length, fruit weight, fruit flesh density and yield per plant compared to commercial hybrids. Days to flowering and days to harvesting of IPB CH3 was earlier than that of Hot Beauty. The performance of yield characters in Boyolali, Rembang and Subang was better than that in Bogor. The IPB CH3 hybrid was specifically adapted to Subang and Rembang, while IPB CH1, IPB CH2, IPB CH25 were suitable for Boyolali. Keywords: fruit, yield components, genotype x location interaction, Capsicum annuum L.

Kajian Pemupukan NPK dan Jarak Tanam pada Produksi Antosianin Daun Kolesom

Abstract: The effects of NPK fertilization and plant spacing on leaf anthocyanin production of Talinum triangulare (Jacq.) Willd. were studied. A factorial experiment was used to study the combination of two factors i.e. NPK fertilization (no fertilization, NPK, NP, NK, and PK) and plant spacing (100 cm x 45 cm, 100 cm x 60 cm, 100 cm x 75 cm). These combinations were arranged in randomized block design, with three replications. The result showed that there was no effect of plant spacing and interaction between two factors. Application of NP (minus K) fertilizer gave the lowest value for almost all parameter except shoot/root ratio. This result suggested that fertilization played significant role in increasing anthocyanin production and the limiting factor was potassium. Key words : Talinum triangulare , NPK fertilization, anthocyanin production

Perubahan Karakter Agronomi Aksesi Plasma Nutfah Kedelai di Lingkungan Ternaungi

Abstract: Excessive shading during plant growth is one of the factors that might decrease the productivity of crops. The aim of this study was to determine agronomic characters of soybean germplasms grown under shaded environment. The research was carried out at Kendalpayak experimental station (grey Alluvial soil, 450 m above the sea level with C3 climate type) during dry season in Malang, from February to April 2006. The experimental design used was Randomized Complete Block Design with three replications. The genetic material observed were 120 accessions of Balitkabi’s soybean germplasm; the treatments were without shading and 50% shading using shading net. The results showed that 50% shading decreased plant age to harvest, increased plant height, and reduced the number of pods and seed weight compared to those in no shading environment. Based on Stress Tolerancy Index (STI) analysis on the seed weight per plant, fi ve accessions i.e. MLGG 0845, MLGG 3335, MLGG 0010, MLGG 0771, and Wilis demonstrated high tolerance on 50% shade