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Widyariset

widyariset
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Published by Lembaga Ilmu Pengetahuan Indonesia

ISSN : 14117932 EISSN : 24610976 DOI : -

Core Subject : Engineering,

Engineering

Widyariset is a scientific journal which publishes the results of research and development, assessment and systematic thinking about science and technology. The writers of the scientific papers in this journal come from researchers/researcher candidates from various institutions' research and development (R&D), and universities. Widyariset is published regularly three times a year: in April for the issue of Social Sciences and Humanities (IPSK), in August for the issue of Natural Sciences (IPA) and in December for the issue of Engineering Sciences (IPT).

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Articles 24 Documents

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Search results for , issue "Vol 14, No 2 (2011): Widyariset" : 24 Documents clear

OPTIMIZING UTILIZATION OF WATER IN VAN DER WIJCK IRRIGATION SYSTEM BY FUZZY LINEAR PROGRAMMING FOR FARMING SYSTEM Sukarjo Sukarjo
Widyariset Vol 14, No 2 (2011): Widyariset
Publisher : Pusbindiklat - LIPI

Van Der Wijck irrigation system was applied in Sleman and Bantul district of the Yogyakarta Special Province that has a 3,426.57 ha area. Van Der Wijck is a multipurpose irrigation system because water is used not only for growing crops, but also for sugarcane plantation and fi sh pond. Because the priority service is not clearly defi ned, confl icts among water users are easily occur. The aims of the study were (i) to compute and to predict the water availability both from rainfall and river fl ow, and (ii) to determine the use of the water in order to obtain optimum area of fi sh pond, sugarcane plantation, and other crops passed on discharge availability, seasonal water require-ment, and farm profi t. The results showed that the optimum areas for fi sh pond 17.2 ha and rice fi eld 3,309.57, 2,409.57, and 1,909.57 ha for planting season I, II, and III, respectively. The optimum areas for sugarcane are 35 ha, which is exchangeable with rice area. The optimum area of upland crops for planting season I, II, and III are 100, 1,000, and 200 ha, respectively.

PHOSPHORUS CONTENT IN THE LOWLAND RICE (Oryza sativa L.) DERIVED FROM P-FERTILIZER AND ORGANIC MATTER Aisyah D. Suyono; Ania Citraresmini
Widyariset Vol 14, No 2 (2011): Widyariset
Publisher : Pusbindiklat - LIPI

A pot experiment was conducted at the experiment station PATIR – BATAN, in order to determine phospho-rous content derived from P-fertilizer and organic matters in paddy ﬁ eld, both quantitatively and qualitatively. In the experiment, factorial pattern of Randomized Group Design with 3 replication was used. The ﬁ rst factor was the dose of SP-36 with four doses, which were 0, 30, 60, and 90 kg ha/SP-36. The second dose was organic fertilizer with four doses, which were 0, 5, 10, dan 15 ton/ha. 32P isotope technique with A-value methode was used to determine the absorption of P by the plants in order to establish the composition of P derived from the soil, 32P, SP-36 and organic fertilizer. The results of the experiment proved that an increase in the P content from one of the P sources caused a decrease in the P content from other P sources.

EFFECT OF MIXING THE CALF FECES WITH COASTAL SANDYSOIL ON THE GROWTH OF CORN PLANT (Zea mays) Agung Prabowo; Soemitro Padmowijoto; Zaenal Bachruddin; Abdul Syukur
Widyariset Vol 14, No 2 (2011): Widyariset
Publisher : Pusbindiklat - LIPI

This research was intended to determine the effect of combination calf feces and coastal sandy-land on the growth of corn plant. This experiment was arranged in a 2x3x2 factorial pattern of completely randomized design. First factor was calf feces of with and without microbe treatment, second factor was three levels of feces incubation which were 0 day (I-0), 20 days (I-20), and 40 days (I-40), and third factor was fecal dosages of 15 ton/ha (D15) and 30 ton/ha (D30). Parameters of plant height, dry, and wet weight of roots and vegetative, chemical and physical properties of mixture of calf feces and coastal sandy-land were observed. The plant height was observed weekly. There was a signiﬁ cant difference (P<0.05) on combination of feces without and with microbe treatment,fecal incubation time and dosage on the plant height. There was a tendency of increasing fecal dosage and fecal incubation time on the increase of plant height. This study suggests that calf feces could improve the corn plant growth in coastal sandy-land.

PHYSICOCHEMICAL AND ORGANOLEPTIC CHARACTERISTICS OF RED GUAVA (Psidium guajava L.) JUICE INSTANT DRINK POW- DER PRODUCED USING FOAM-MAT DRYING METHOD Sandi Darniadi; Iyan Sofyan; Dede Z. Arief
Widyariset Vol 14, No 2 (2011): Widyariset
Publisher : Pusbindiklat - LIPI

Powder product as instant drink from red guava (Psidium guajava L.) juice is more practicable to increase economic value. The objective of the research was to investigate physicochemical and organoleptic characteristics of red guava juice instant drink powder produced using foam-mat drying method. The results showed that red guava juice instant drink powder produced using foam-mat drying method had high yield with solubility was low, the brightness was high, the level of redness was high, the level of yellowish was low, sugar was high, and sensory properties were accepted by panelist.

PERFORMANCE OF FEMALE DUCKLING WHICH MAINTAIN BASED ON SMALL, BIG AND MIXED GROUPS OF HATCHING WEIGHT Komarudin Komarudin; Rukmiasih Rukmiasih; P.S. Hardjosworo
Widyariset Vol 14, No 2 (2011): Widyariset
Publisher : Pusbindiklat - LIPI

This research was conducted to determine the effect of maintain method based on small, big and mixed groups hatching weight on performance at the age of six weeks. 122 female Day Old Duck (DOD) were used. The ducks were partitioned based on hatching weight. DOD with more than 42 g was classiﬁ ed as a big group and less or equal to 42 g were classiﬁ ed as small group. Mixed group was taken from those two groups randomly. Feed consumption and conversion, growth and weight of ducks at the age of six weeks were measured. The research used Random Group Analysis. The result showed signiﬁ cant different (P<0,01) of growth and the weight. Feed consumption and conversion of each groups (small, big and mixed) did not showed the differences (P>0,05).Separated maintain method duck based on hatching weight (small and big groups) did not give better performance than mixed group method.

THE ECONOMICAL FEASIBILITY OF SOYBEAN FARMING WITH THE INTEGRATED CROP MANAGEMENT (ICM): CASE STUDY AT NIMBOKRANG DISTRICT JAYAPURA Pandu Laksono; Adnan Adnan
Widyariset Vol 14, No 2 (2011): Widyariset
Publisher : Pusbindiklat - LIPI

The objective of this research was to determine the economical feasibility of soybean farming with the Integrated Crop Management (ICM) approach. This research was conducted in April–December 2009 and took place in Nimbokrang District, Jayapura Regency, Papua Province. Integrated Crop Management components were the use of high yield seeds (Ijen, Burangrang, Tanggamus, Seulawah), perfect soil tillage, balanced fertilizer and spacing. The research involved two cooperative farmers which apply ICM method and one non-cooperator farmer who apply the farmers system, using Ijen variety that are already common planted by local farmers. The results showed that the variety of Ijen with ICM method obtained the highest yields 2.15 tonn/ha with B/C ratio was 1.47,whereas Burangrang yields was 1.89 tonn/ha with B/C ratio 1.24, Tanggamus yields was 1.68 tonn/ha with B/C ratio 1.04 and Seulawah yield was 1.28 tonn/ha with B/C ratio 0.64. All of the varieties cultivated by the ICM method were feasible except Seulawah. Soybean farming using Ijen, Burangrang and Tanggamus varieties were feasible to develop with MBCR value of Ijen is 2.47, Burangrang 2.24, and Tanggamus 2.04.

JAVA COASTAL CURRENT AT NORTHWEST AND SOUTHEAST MONSOON IN SOUTHWEST SUMATRA La Ode Nurman Mbay; I Wayan Nurjaya
Widyariset Vol 14, No 2 (2011): Widyariset
Publisher : Pusbindiklat - LIPI

The Java Coastal Current (JCC) is valuable information since its supplies water mass to South Indonesian water. The data analysis was done using temperature, salinity and depth informations from CTD (Conductivity, Temperature, and Depth). Those informations was calculated based on Neuman and Pierson (1966) with 600 db in reference level, in order to obtain the dynamic topography and geostrophy velocity. The results showed that there was a dynamic depth divergence between shore and the off shore, both was occured in Northwest monsoon and Southeast monsoon. Hence it was acting as a trigger of the geostrophy current toward Southeast with maximum velocity was 18.81 cms -1 and 1.53 sv of transport volume.

INDUCTION OF TRIPLOID SANDALWOOD PLANT (Santalum album L.) THROUGH ENDOSPERM CULTURE IN VITRO Lazarus Agus
Widyariset Vol 14, No 2 (2011): Widyariset
Publisher : Pusbindiklat - LIPI

Sandalwood (Santalum album L.) is an over exploitation that causes the population decreases drastically. An experiment was carried out to get triploid plant by using young seed culture. Young seeds of sandalwood were peeled and grew on solid Murashige and Skoog (MS) media formulation with or without addition hormones of α-napthaleneacetic acid (NAA), 2,4 dichlorophenoxyacetic acid (2,4-D), 6-benzylaminopurine (BA) or kinetin.(K). The young seed did not form shoot, but its endosperm formed callus. The endosperm produced callus 26.67% on media with addition of BA 1 mg/l, but not on media without any addition of hormone. The best callus production was on media with addition of NAA 2 mg/l and BA 1 mg/l. The best somatic embryos formation was NAA 1 mg/l + BA 1 mg/l and shoot formation was 2,4-D 1 mg/l + K 1 mg/l treatments. The resulted shoots from endosperms are expected to be triploid plants.

GROWTH AND YIELD OF Eucalyptus grandis HILL EX MAIDEN AT AEK NAULI SIMALUNGUN NORTH SUMATRA Aswandi Aswandi
Widyariset Vol 14, No 2 (2011): Widyariset
Publisher : Pusbindiklat - LIPI

Sustainable forest management need an effective yield regulation. This is depend on precision of growth and yield prediction on determination of rotation, harvesting intensity, thinning regime and another silviculture option. The objective of the study was to develop growth and yield model and deﬁ ned optimum cutting rotation for Eucalyptus grandis Hill ex Maiden timber estate at Aek Nauli Simalungun North Sumatra. Current growth estimation and yield prediction models were studied using data from 15 permanent sampling plots. Data from annual measurement were used to formulate the models which include stand diameter and height function, basal area and stand volume function. Site quality was calculated using site index equation SI = H*{(1+10.03*e)/(1+10.03*e. This equation was developed based on relationship dominant height with stand age. Site index in that region have varies from 18.99 to 35.26. According on interception of curva Current Annual Increment (CAI) and Mean Annual Increment (MAI) were deﬁ ned optimum cutting rotation at 6 year. Volume yield at this end rotation is 165,24 m -0.59*1/83/hawith MAI (Mean Annual Increment) 27,54 m /ha/yr. Yield prediction model were developed by regression analysis. The optimum of equations of mean of diameter, height, basal area and stand volume showed as follow: a. Stand dbh model : ln D = 0.743 + 0.363 ln A + 0.142 lnS + 0.313 ln B; b. Stand mean height model: lnH = - 0.206 + 0.247 lnA + 0.100 lnB + 0.822 lnS; c. Volume yield model : ln V = - 1.96 + 0.526 ln A + 0.548ln B + 1.38 ln S. Where D : dbh (cm), H: mean height (h), V : stand volume (m33 ha), A : age (yr), B: basal area (m), and S : site index. 2-1-0.59A

THE EFFECTIVENESS OF CHITOSAN TOXICITY TO CONTROL THERMITES (Coptotermes curvignathus HOLMGREN) AT RUBBER PLANT Zaida Fairuzah; Aidi Daslin
Widyariset Vol 14, No 2 (2011): Widyariset
Publisher : Pusbindiklat - LIPI

Thermite (Coptotermes curvignathus) is the destructive pest at rubber plantation especially rubber planta-tion which is ex of old plantation or forest with inaccurate land clearing. Chitosan known can control thermites by disturbing protozoa’s rules in digestion systems of thermites that causing thermites can not get the food yielded by protozoa. Effectiveness of Chitosan was known by directly testing chitosan to thermites with the pre eliminary test to get the range of effective concentration and way of effective application with 8 treatments in 4 concentration levels ( 0.1, 1, 10, and 100%) which is each concentration combined with two way of application (spraying and baiting) with 4 replications. Based to the result of pre eliminary test, 1% chitosan concentration determined as concentration standard of main test which consists of concentration test (0.1, 0.5, 1, and 2%) with the spraying application with 4 replications with control and termicide as comparitors. The same concentrations and compari-tors were also tested with the baiting application with 4 replications. Then, the test also done by combinating spraying and baiting application with same concentrations (0.1, 0.5, 1, and 2%) and compared with control and termiticides that replicated 3 times. The percentage of thermites mortality was observed every two days until the 4th day after application. The result showed that the combination treatment between concentration and way of application of chitosan showed that the most effective concentration to kill the thermites is 2% baiting application with the mortality percentage of thermites reaches 54.78% at the 4th day after application

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Pusbindiklat Peneliti-LIPI (The National Training and Education Center for Researchers Development – Indonesian Institutes of Sciences) Jl. Raya Bogor Km. 46, Cibinong Science Center Cibinong - Bogor 16911

Location
Kota adm. jakarta selatan,

Dki jakarta

INDONESIA