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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.
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Articles 5 Documents
 1 
Search results for , issue " Vol 10, No 1 (2009): April 2009" : 5 Documents clear
ALTERNATIVE TREE CROPS FOR RECONSTRUCTION OF THE GREEN INFRASTRUCTURE POST-TSUNAMI IN THE COASTAL AREAS OF ACEH BARAT DISTRICT Wahyunto, Wahyunto; Ritung, Sofyan; Wahdini, Wahyu; Agus, Fahmuddin
Indonesian Journal of Agricultural Science Vol 10, No 1 (2009): April 2009
Publisher : Indonesian Agency for Agricultural Research and Development - MOA

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Abstract

Tree farming such as coconut, cocoa, coffee, rubber, and rambutan was dominant in the west coast of Aceh prior to tsunami. The farming is not only important for sustainable livelihood, but also for superior environmental protection. During the tsunami, considerable portion of this ‘green infrastructure’ was devastated. Therefore, a scientifically based land suitability evaluation is needed for supporting the redesign and  reconstruction of the tree-based farming. The objectives of this research were to evaluate the current physical condition of the area and developrecommendation of land suitability for tree crops farming in the area. Field survey for inventory and evaluation of land characteristics was conducted in 2006, 15 months after the tsunami. Land suitability evaluation was conducted by matching field survey data and soil sample analyses in every mapping unit with crop growth requirements. The land suitability map wasfurther matched with the district development plan, existing land uses and land status. The resulted land use recommendation map showed that the marine ecosystem along the coastal line was most suitable for coconut, cacao, coffee, and casuarinas. The recommended tree crops for the ancient sandy beach were areca nut, coconut, rambutan, mango, rubber and oil palm; and for the alluvial ecosystem were coconut, cacao, areca nut, mango, and bread fruit. Peatland of less than 3 m thick was marginally suitable for oil palm and rubber, while those thicker than 3 m were recommended for conservation due to its fragile ecosystem. In the undulating tectonic plain, the suitable tree crops were rubber, oil palm, coconut, and rambutan.
THE GENOTYPES X ENVIRONMENT INTERACTION FOR STARCH YIELD IN NINE-MONTH OLD CASSAVA PROMISING CLONES Sholihin, Sholihin
Indonesian Journal of Agricultural Science Vol 10, No 1 (2009): April 2009
Publisher : Indonesian Agency for Agricultural Research and Development - MOA

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Abstract

Cassava (Manihot esculenta) is planted in dry areas with different environmental conditions, therefore the yield is varied. The aim of the study was to analyze the genotype x environment interaction for starch yield in 9-month old cassava promising clones. The experiment was conducted on mineral soils in four different locations, i.e. Lumajang-East Java (Inceptisols), Kediri-East Java (Entisols), Pati-Central Java (Alfisols), and Tulangbawang-Lampung (Ultisols) during 2004- 2005. The experiment was arranged in split plot design with three replications. The main plots were cultivation techniques, i.e. simple technology and improved technology, whereas the subplots were 15 cassava promising clones. Starch yield of 9- month old cassava plants was analysed using the additive maineffects and multiplicative interaction (AMMI). The results showed that environmental factors determined the stability of starch yield were soil bulk density on subsoil, the number of rainy days at fifth month, minimum air temperature at fourth month, and minimum air humidity at seventh month. CMM97002-183, Adira 4, CMM97007-145, CMM97007-235, Malang 2, CMM97002-36, and CMM97006-44 were identified as the stable cassava clones for starch yield in 9-month old. Average starch yield of Adira 4 was the third after MLG 10311 and CMM 97006-52. The CMM97006-52 was adapted to the soils having high P2O5 content on topsoil, high minimum air temperature at 4 and 5 months after planting, high minimum relative humidity at 7 months after planting, low total rainfall at 5 months after planting, and low number of rainy days at 5 and 8 months after planting. MLG 10311 was adapted to low soil bulk density. The average starch yield of MLG 10311 was the highest at 9 months after planting. The study implies that advanced trials for CMM 977006-52 and MLG 10311 clonesare needed, so the clones can be released as new varieties of cassava. In selection and evaluation, the bulk density on subsoil is needed to be attained specifically to increase the probability to obtain new variety of cassava.
SOYBEAN SEEDLING ROOT GROWTH PROMOTION BY 1-AMINOCYCLOPROPANE-1-CARBOXYLATE DEAMINASE-PRODUCING PSEUDOMONADS Husen, Edi; Wahyudi, Aris Tri; Suwanto, Antonius; Saraswati, Rasti
Indonesian Journal of Agricultural Science Vol 10, No 1 (2009): April 2009
Publisher : Indonesian Agency for Agricultural Research and Development - MOA

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Abstract

Pseudomonad producing 1-aminocyclopropane-1-carboxylate(ACC) deaminase (E.C.4.1.99.4) has been known to promoteplant growth by lowering ethylene biosynthesis in higher plants,which can be induced by indole-3-acetic acid (IAA) production.The objective of this study was to examine the ability of IAAproducingPseudomonas isolated from local soil environment(rhizosphere of soybean grown in Plumbons agricultural areain Cirebon, West Java, Indonesia) to promote soybean root growthin relation to their ACC deaminase activities. The experimentswere conducted in growth room and Laboratory of Soil BiologyResearch, Indonesian Soil Research Institute, Bogor, from Januaryto August 2008. Soybean seeds were inoculated by immersing theseeds for 1 hour in bacterial cell suspension containingapproximately 108-109 cells ml-1. The seeds were then germinatedfor 2 days before planting in growth pouches containing sterilizeddistilled water. All treated and untreated seeds were grown for7 days in growth room at 24°C with 1300 lux of light intensityfor 12-hour followed by a 12-hour dark period at 22°C. ACCdeaminase activity of the isolates was assayed based on their abilityto grow in Dworkin-Foster’s salt minimal medium containingammonium sulfate or ACC as a source of nitrogen. Thirteen outof 81 isolates tested significantly increased soybean root lengthand weight, up to 50% from untreated plants. Of 13 isolates,11 demonstrated ACC deaminase activities. Two isolates thatdid not show ACC deaminase activities had lower capacity toproduce IAA. The results suggest that the effectiveness of IAAproducingPseudomonas in promoting the growth of the soybeanseedlings is associated with their ACC deaminase activities orthey produce IAA at low levels.
THE CONTINUAL FORMING AND CONTRIBUTION OF INFECTIVE JUVENILES PRODUCED VIA ENDOTOKIA MATRICIDA OF ENTOMOPATHOGENIC NEMATODES IN THE FAMILY OF STEINERNEMATIDAE AND HETERORHABDITIDAE Baliadi, Yuliantoro; Kondo, E.; Yoshiga, T.
Indonesian Journal of Agricultural Science Vol 10, No 1 (2009): April 2009
Publisher : Indonesian Agency for Agricultural Research and Development - MOA

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Abstract

The non-feeding developmentally arrested infective juveniles (IJs)of entomopathogenic nematodes in the family of Steinernematidaeand Heterorhabditidae seek out a susceptible insect host and initiateinfections. The aim of the research was to examine the continualforming and contribution of IJs produced via endotokia matricida(IJs-EM) of Heterorhabditis bacteriophora, Steinernema glaseri,and S. carpocapsae. The research was conducted at the Laboratoryof Nematology of the Saga University, Japan (April 2001-April2002) and the Laboratory of Nematology of the IndonesianLegume and Tuber Crops Research Institute (June 2003-October2004). The nematode progenies were investigated using the greaterwax moth, Galleria mellonella, pre-inoculated with 50 IJs at 25°C.Results showed that three reproductive adult generations wereobserved at day 18th. There were 135,000, 128,000 and 133,000 IJsper insect cadaver produced in H. bacteriophora, S. glaseri and S.carpocapsae, respectively. Endotokia matricida contributed ahigher number of IJs than that of a normal mode of IJs production.The ratios are 81%, 28% and 64% for H. bacteriophora, S. glaseri,and S. carpocapsae of the IJs total production, respectively. Amongthe generations, the highest contribution of IJs was come from thethird adult generation bearing endotokia matricida, i.e., 63%, 24%and 51% for the three nematode species. Although the IJs-EMwere more transparent compared to the normal IJs, they weremorphologically similar. The results show that endotokia matricidahas a pivotal role in a species maintenance and survival strategyof entomopathogenic nematodes in extreme environmental conditions.
KINETIC EVALUATION OF ETHANOL-TOLERANT THERMOPHILE Geobacillus thermoglucosidasius M10EXG FOR ETHANOL PRODUCTION Riyanti, Eny Ida; Rogers, Peter L.
Indonesian Journal of Agricultural Science Vol 10, No 1 (2009): April 2009
Publisher : Indonesian Agency for Agricultural Research and Development - MOA

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Abstract

Thermophiles are challenging to be studied for ethanol productionusing agricultural waste containing lignocellulosic materials richin hexose and pentose. These bacteria have many advantagessuch as utilizing a wide range of substrates, including pentose (C5)and hexose (C6). In ethanol production, it is important to useethanol tolerant strain capable in converting lignocellulosichydrolysate. This study was aimed to investigate the growth profileof ethanol-tolerant thermophile Geobacillus thermoglucosidasiusM10EXG using a defined growth medium consisted of single carbonglucose (TGTV), xylose (TXTV), and a mixture of glucose andxylose (TGXTV), together with the effect of yeast extract additionto the media. The experiments were conducted at the Schoolof Biotechnology and Biomolecular Sciences of The Universityof New South Wales, Australia on a shake flask fermentationat 60°C in duplicate experiment. Cultures were sampled everytwo hours and analised for their kinetic parameters includingthe maximum specific growth rate (µmax), biomass yield (Yx/s),ethanol and by-product yields (acetate and L-lactate) (Yp/s),and the doubling time (Td). Results showed that this strain wascapable of growing on minimal medium containing glucose orxylose as a single carbon source. This strain utilized glucose andxylose simultaneously (co-fermentation), although there wasglucose repression of xylose at relatively low glucose concentration(0.5% w/v), particularly when yeast extract (0.2% w/v) was addedto the medium. The highest biomass yield was obtained at 0.5g l-1 on glucose medium; the yield increased when yeast extractwas added (at 0.59 g l-1). The highest specific growth rate of 0.25was obtained in the phase I growth when the strain was grownon a mixture of glucose and xylose (0.5% : 0.5% w/v) medium.Diauxic growth was shown on the mixture of glucose, xylose,and yeast extract. The strain produced low level of ethanol (0.1g l-1), as well as low level (0.2 g l-1) of by-products (L-lactateand acetate) after 15 hours. The results suggests its potentialapplication for fermenting lignocellulosic agricultural wastes forethanol production.

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