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INDONESIA
Indonesian Journal of Agricultural Science
Published by Kementerian Pertanian
ISSN : 1411982X     EISSN : 23548509     DOI : -
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
The journal publishes primary research articles from any source if they make a significant original contribution to the experimental or theoretical understanding of some aspect of agricultural science in Indonesia. The definition of agricultural science is kept as wide as possible to allow the broadest coverage in the journal. Accredited base on Director Decree of Indonesian Institute of Science No. 816/D/2009 with acreditation No. 172/AU1/P2MBI/08/2009. IJAS is newly accredited by the Indonesian Institute of Science in 2012 (No. 473/AU2/P2MI-LIPI/08/2012) for period of 2012-2015.
Arjuna Subject : -
Articles 352 Documents
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REPRODUCTIVE BIOLOGY OF FIVE SPECIES OF ANCHOVIES (ENGRAULIDAE) FROM BIMA BAY, SUMBAWA, NUSA TENGGARA Retno Andamari; David Milton; Thohir Zubaidi
Indonesian Journal of Agricultural Science Vol 3, No 2 (2002): October 2002
Publisher : Indonesian Agency for Agricultural Research and Development

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/ijas.v3n2.2002.p37-42

Abstract

The reproductive biology of five species of anchovies (Encrasicholina and Stolephorus) in Bima Bay, Nusa Tenggara, Indonesia was examined and  compared with previous studies of the same species in Bacan, Maluku and other parts of Indonesia. Fish and plankton sampling was conducted in February and April 2000. The length and weight relationship of five species of anchovies had a slope (b) that ranged from 2.71 to 3.74. These values were less than those found in Bacan for the same species. All species were multiple spawner and the mean batch fecundity ranged between 1226 (Encrasicholina devisi) and 2470 (E. punctifer). Relative fecundity varied among the species inversely with size, being lower in the larger species. Age at first spawning varied from 67 to 141 days for all five species and was higher in Stolephorus species. Lifetime egg production was less than that found in Bacan for the same species, but similar to that found in similar habitats elsewhere in the tropical Indo-Pacific. These results suggest that anchovy egg production is higher, but more variable in open oceanic environments compared with the more stable, coastal bays.
HARDNESS PHENOMENON IN BEACH PEA (Lethyrus maritimus L.) U.D. Chavan; R. Amarowicz; F. Shahidi
Indonesian Journal of Agricultural Science Vol 14, No 1 (2013): April 2013
Publisher : Indonesian Agency for Agricultural Research and Development

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/ijas.v14n1.2013.p36-43

Abstract

Beach pea is mostly grown on seashores and it contains higher amount of protein than other legumes. However, the pea has several undesirable  attributes, such as long cooking time and hard to germinate (imbibitions) that limited its use as food. The present investigation aimed to study the physico-chemical properties, cooking characteristics and hull crude fibre structure of beach pea as compare to other similar legumes. Standard methods of processing pulses were used for present study. Beach pea seeds contained very low grain weight, density, hydration capacity,  hydration index, swelling capacity and swelling index than the green pea and field pea. Beach pea had higher amount of crude protein, ash, crude fibre and polyphenols, but lower in starch content than the green pea and field pea. Without any treatment to beach pea seeds the water uptake capacity was very low. Mechanical treatment to beach pea seeds increasedthe water uptake percentage. The recovery of hull was 3 to 6 times higher in beach pea than that of green pea and field pea. The crude protein  content in beach pea hull was 2-5% higher than others. The beach pea hull, dhal and whole seeds were good source of macro- and micro- minerals than that of the other two peas. The electron microscopic  structure of beach pea hull crude fibre showed a very close and compact structure than green pea and field pea hull crude fibre structure. Lowering the hardness of beach pea seeds with mechanical or chemical treatments will give more scope for their utilization in the human nutrition.
EVALUATION OF NUTRITION AND GLYCEMIC INDEX OF SWEET POTATOES AND ITS APPROPRIATE PROCESSING TO HYPOGLYCEMIC FOODS Made Astawana; Sri Widowati
Indonesian Journal of Agricultural Science Vol 12, No 1 (2011): April 2011
Publisher : Indonesian Agency for Agricultural Research and Development

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/ijas.v12n1.2011.p40-46

Abstract

Indonesia placed the fourth biggest diabetics in the world after India, China, and the USA with prevalence amounting to 8.6% of the population. Diabetes is an abnormal carbohydrate metabolism. Therefore, nutrition plays a key role in the management of the disease. This study aimed to find hypoglycemic sweet potatoes and appropriate processing to create low glycemic foods. Eight Indonesian sweet potato varieties/clones were used in this experiment, i.e. Kidal, Sukuh, Sari, Ungu, Jago, BB00105.10, B0464, and BB00106.18. Samples were firstly analyzed for their physicochemical and nutritional properties, which then followed by evaluation of their hypoglycemic responses. The selected variety was processed into three different basic processing methods, i.e. boiling, baking, and frying, and then their glycemic indexes (GI) were evaluated. Result showed that among eight sweet potato varieties/clones studied, BB00105.10 clone indicated the best hypoglycemic response. The highest hypoglycemic activity was supported with the highest resistant starch content (3.8%), protein content (5.47%), and low starch digestibility (51.4%). The sweet potato tubers contained medium to high amylose (24.94%). Processing methods influenced the GI value of foods. Fried sweet potatoes had the lowest GI (47), followed by the boiled one (GI = 62) and the baked one (GI = 80).
DIVERSITY AND CAPABILITY ANALYSES OF FERTILITY RESTORER GENES OF CYTOPLASMIC MALE STERILE RICE LINES USING SSR Yuni Widyastuti; Muhamad Yunus; Bambang Sapta Purwoko; Satoto Satoto
Indonesian Journal of Agricultural Science Vol 18, No 2 (2017): December 2017
Publisher : Indonesian Agency for Agricultural Research and Development

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/ijas.v18n2.2017.p43-50

Abstract

Development of hybrid rice depends on the effectivity of cytoplasmic male sterility (CMS) and restorer (R) lines.  The molecular genetic approach is expected to help the breeder in identification of suitable parental lines to hybrid rice improvement. The study aimed to assess genetic relationship among three types of CMS systems (wild  abbortive/WA Kalinga and Gambiaca) as female parents and to identify diversity of genes controlling fertility restoration in rice. The study used nine F1 hybrids and F2 populations obtained from the hybridization of three different CMS lines (IR58025A-WA, IR80156A-Kalinga and IR80154A-Gambiaca) with three restorer lines (PK90, PK12 and BP11). Fifteen SSR markers were used to select genomic regions of chromosome 1 and 10 on which Rf3 and Rf4 genes located in the hybrids. The results showed that fertility restoration in CMS-WA and CMS-Gambiaca was governed by two independent and dominant genes (Rf3 and Rf4), while in CMS-Kalinga the fertility restoration was controlled by one single dominant gene. Biological processes occurred in the fertility restoration of the hybrids were the same based on the pollen and spikelet fertilities of F1 hybrids derived from three CMS and R lines, i.e. 76.1–78.3% and 69.1–76.6%, respectively. A restorer line PK12 had a higher capability in fertility restoration than PK90 and BP11. The SSR primers RM490 and RM258 were capable of identifying the Rf3 and Rf4 genes controlled fertility restoration in CMS-WA. The study supports the use of male sterile WA in rice hybridization.  
THE SEGREGATION PATTERN OF INSECT RESISTANCE GENES IN THE PROGENIES AND CROSSES OF TRANSGENIC ROJOLELE RICE Satoto Satoto; Yuli Sulistyowati; Alex Hartana; Inez H. Slamet -Loedin
Indonesian Journal of Agricultural Science Vol 9, No 2 (2008): October 2008
Publisher : Indonesian Agency for Agricultural Research and Development

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/ijas.v9n2.2008.p35-43

Abstract

Successful application of genetic transformation technique, especially in developing rice variety resistant to brown plant hopper and stem borer, will depend on transgene being expressed and the gene inherited in a stable and predictable manner. This study aimed to analyse transgene segregation pattern of the progenies and the crosses of transgenic rice cv. Rojolele harboring cry1Ab and gna genes. The third generation (T2) of fivetransgenic Rojolele events containing gna and/or cry1Ab were evaluated for two generations to identify the homozygous lines and to study their inheritance. The homozygous lines were selected based on the result of PCR technique. The segregation patterns of gna and cry1Ab were studied in eight F2 populations derived from Rojolele x transgenic Rojolele homozygous for cry1Ab and or gna and their reciprocal crosses. Data  resulted from PCR of F2 population were analysed using a Chi Square test. The study obtained six homozygous lines for gna, namely A22- 1-32, A22-1-37, C72-1-9, F11-1-48, K21-1-39, K21-1-48, and two homozygous lines for cry1Ab, namely K21-1-39 and K21- 1-48. Both cry1Ab and gna transgenes had been inherited through selfing and crossing with their wild type as indicated from the F1 containing gna and cry1Ab as many as 48.4% and 47.4%, respectively. In six of the eight crosses, gna was inherited in a 3:1 ratio consistent with Mendelian inheritance of a single dominant locus, while in the remaining two crosses, gna was segregated in a 1:1 ratio. The presence of cry1Ab in F2 populations also showed a 3:1 segregation ratio in all crosses. In the F2 population derived from F1 plant containing cry1Ab and gna, both transgenes segregated in a 9:3:3:1 dihybrid segregation ratio. This study will add to the diversity of genetic sources for insect resistance and allow further use of these transgenic lines for pyramiding resistance to brown plant hopper and stem borer or  separately in rice breeding programs whenever the efficacy tests and biosafety requirements have been completed.
THE STEM BORER INFESTATION ON RICE CULTIVARS AT THREE PLANTING TIMES Hendarsih Suharto; N. Usyati
Indonesian Journal of Agricultural Science Vol 6, No 2 (2005): October 2005
Publisher : Indonesian Agency for Agricultural Research and Development

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/ijas.v6n2.2005.p39-45

Abstract

Stem borer is the second important rice pest after rats in Indonesia. A field trial was conducted in Karawang, West Java in dry season of 2003 to study the effect of planting time on the stem borer infestation on seven rice cultivars. The rice cultivars tested were Fatmawati (new plant type cultivar), Gilirang (semi-new plant type cultivar), Maro and Intani 3 (hybrid rice cultivars), and IR72, Cilosari and IR62 (inbreed rice cultivars). The three planting times (PT) were: (1) the early PT, 14 days before farmer’s PT, (2) the common PT, simultaneously with farmer’s PT, and (3) the late PT, 14 days after farmer’s PT. The trial was arranged in a split plot design with four replications. Planting time is the main plot and rice cultivar is the subplot. Fourteen-day old rice seedlings were transplanted at 25 cm x 25 cm planting distance in a 5 m x 6 m plot size. Species and fluctuation of rice stem borer were determined by using water traps containing four synthetic sex pheromone lures of rice stem borer species as attractant. Results showed that the dominant species of stem borer was yellow stem borer (Scirpophaga incertulas Wlk.). Degree of stem borer infestation depended upon the planting time. Stem borer infestation at the first planting time was higher (average 37.90%) compared to those found at the second and third planting time, i.e. 0.65% and 0.54%, respectively. Rice yields of Fatmawati, Gilirang, Maro, Intani-3, and Cilosari cultivars correlated with the degree of stem borer infestation, but did not correlate with planting time. Cilosari cultivar showed the most tolerant under heavily stem borer infestation. The present study implies that adjustment of planting time is the most feasible effort to reduce stem borer infestation because none of the seven rice cultivars tested were able to minimize damage under heavily infestation of yellow stem borer.
CATCH DIFFERENCES OF BOTTOM LONG LINE USING FRESH AND SALTED FISH BAITS Mahiswara Mahiswara; Wudianto Wudianto
Indonesian Journal of Agricultural Science Vol 2, No 1 (2001): April 2001
Publisher : Indonesian Agency for Agricultural Research and Development

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/ijas.v2n1.2001.p27-29

Abstract

Bottom long line is an important gear for catching demersal fish and normally uses fresh fish as bait. Recent development indicates that the fishing  grounds for bottom long line are  further away from the coast and consequently bait with longer life-time may be needed. Research on the use of fresh and salted fish baits for bottom long line has been conducted in the eastern Bali waters. In this study, salted and fresh baits were used simultaneously for fishing. The results showed that the catch of bottom long line using fresh bait was significantly higher than that for salted bait  indicating that other suitable preservation techniques are necessary.
RURAL FARMERS’ PERCEPTION OF CLIMATE CHANGE IN CENTRAL AGRICULTURAL ZONE OF DELTA STATE, NIGERIA A.U. Ofuoku
Indonesian Journal of Agricultural Science Vol 12, No 2 (2011): October 2011
Publisher : Indonesian Agency for Agricultural Research and Development

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/ijas.v12n2.2011.p63-69

Abstract

Farmer perception of their environment is a factor of climate change. Adaptation to climate change requires farmers to realize that the climate has changed and they must identify useful adaptations and implement them. This study analyzed the per-ception of climate change among rural farmers in central agri-cultural zone of Delta State, Nigeria. Climate change studies often assume certain adaptations and minimal examination of how, when, why, and conditions under which adaptations usually take place in any economic and social systems. The study was conducted by survey method on 131 respondents using struc-tured interview schedule and questionnaire. Data were analyzed with descriptive statistics and linear regression model to test that education, gender, and farming experience influenced farmers’ perception of climate change. The results showed that the farmers were aware of climate change. The identified causes of climate change were ranging from intensified agriculture, population explosion, increased use of fossil fuel, loss of in-digenous know practice to gas flaring. The effects of climate change on crops and livestocks were also identified by the rural farmers. Many of the farmers adapted to climate change by planting trees, carrying out soil conservation practice, changing planting dates, using different crop varieties, installing fans in livestock pens, and applying irrigation. Almost half of them did not adapt to climate change. The linear regression analysis revealed that education, gender, and farming experience influ-enced farmers’ perception of climate change. The major barriers to adaptation to climate change included lack of information, lack of money, and inadequate land.
CAPILLARY WATER RISE IN PEAT SOIL AS AFFECTED BY VARIOUS GROUNDWATER LEVELS Muhammad Imam Nugraha; Wahida Annisa; Lailan Syaufina; Syaiful Anwar
Indonesian Journal of Agricultural Science Vol 17, No 2 (2016): October 2016
Publisher : Indonesian Agency for Agricultural Research and Development

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/ijas.v17n2.2016.p75-83

Abstract

Capillary water in peatlands has a very important role in supplying water to the root zone of plants. The current water content in the root zone depends mainly on groundwater levels in some areas with shallow water levels. The study aimed to measure the capillary water dynamics in peat soils at various soil densities and groundwater levels which were observed from the changes in peat color, moisture distribution, water content and hydrophobicity of peat soil. The study was conducted in the greenhouse of Indonesian Swampland Agricultural Research Institute, Banjarbaru, South Kalimantan. The experiment was arranged in a randomized block design with two factors and three replications. The first factor was the bulk density (BD) of peat, namely BD-1 (on actual condition, 0.1 g cm-3) and BD-2 (compressed into 0.2 g cm-3). The second factor was simulated groundwater levels (GWL) consisting of GWL-1 (-100 cm), GWL-2 (-70 cm) and GWL-3 (-40 cm) from soil surfaces. The results showed that the rise of capillary water in peat soil reached a maximum height of 50 cm which was characterized by the increase in water content at the top layer in the range of 105–127% for BD-1 and 141–181% for BD-2. The highest value of water content (308%) was achieved in the treatment of GWL-3 with BD-2 and the lowest (37%) was in the treatment of GWL-1 with BD-1. The rate of capillary water rose progressively corresponded to the increase in BD value because the number of micropores of BD-2 was greater.
Back-matter IJAS 180217 Slamet Sutriswanto
Indonesian Journal of Agricultural Science Vol 18, No 2 (2017): December 2017
Publisher : Indonesian Agency for Agricultural Research and Development

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/ijas.v18n2.2017.p%p

Abstract

Page 25 of 36 | Total Record : 352

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