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Agroland : Jurnal Ilmu-Ilmu Pertanian
Published by Universitas Tadulako
ISSN : 0854641X     EISSN : 24077607     DOI : -
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Agroland : jurnal Ilmu-ilmu pertanian diterbitkan 3 kali dalam satu tahun. Jurnal ini diterbitkan oleh Fakultas pertanian Universitas Tadulako dengan tujuan untuk meningkatkan kapasitas Dosen diLingkup Fakultas Pertanian dalam Bidang Penelitian dan sebagai penunjang dalam Tri Dharma Perguruan tinggi.
Arjuna Subject : -
Articles 14 Documents
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Search results for , issue "Vol 16, No 2 (2009)" : 14 Documents clear
DEGRADASI STOK KARBON (C) AKIBAT ALIH GUNA LAHAN HUTAN MENJADI LAHAN KAKAO DI DAS NOPU, SULAWESI TENGAH Anthon Monde
Agroland: Jurnal Ilmu-ilmu Pertanian Vol 16, No 2 (2009)
Publisher : Universitas Tadulako

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Abstract

Forest conversion has caused carbon stock to decrease, both in vegetation/crop and in soil.  This research aimed to determine the impact of forest conversion to cocoa land use on vegetation and soil carbon stock in Nopu watershed Central Sulawesi. Results of the research showed that the forest conversion to cocoa land use has led to carbon stock decrease both in vegetation and in soil. The carbon stock has yet to fully recover in the 12 years old cacao plantation under agro-forestry system
PENGUJIAN EFEK PENGHAMBATAN EKSTRAK DAUN WIDURI TERHADAP PERTUMBUHAN LARVA Spodoptera exigua Hubn. (Lepidoptera: Noctuidae) DENGAN MENGGUNAKAN INDEKS PERTUMBUHAN RELATIF Shahabuddin Shahabuddin; Flora Pasaru
Agroland: Jurnal Ilmu-ilmu Pertanian Vol 16, No 2 (2009)
Publisher : Universitas Tadulako

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Abstract

The study was conducted to evaluate the growth inhibition effect of leaf extract of Crown plant (LEC), Calotropis gigantean, at various concentrations (5%, 4%, 3%, 2 %, 1 %, and 0% ) on S. exigua larvae.  Inhibition effect was quantified by using growth (GI) and relative growth (RGI) indexes which have some advantages compared to other insect growth parameters. The results showed that the growth inhibition effect of the leaf extract of C. gigantea could be detected using the GI and RGI. The RGI values decreased with increasing of the extract concentration and the LC50 value of LEC to S. exigua was about 2.42 %. The results suggested that C. gigantea extracts contain insect growth inhibitor substance.
PENGARUH PENGENCER SEMEN TERHADAP ABNORMALITAS DAN DAYA TAHAN HIDUP SPERMATOZOA KAMBING LOKAL PADA PENYIMPANAN SUHU 5ºC Ridwan Ridwan
Agroland: Jurnal Ilmu-ilmu Pertanian Vol 16, No 2 (2009)
Publisher : Universitas Tadulako

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Abstract

The research objective was to determine the effects of semen diluter on the abnormality and survival of local goat spermatozoa maintained at 50C. The research used a Completely Randomized Design (CRD) of three different diluter (NaCl 0.9%, Lactate Ringer, and Dextrose Ringer) with six replicates. Analysis of variance showed that the treatment effects were highly significant (P<0.01)              on both the abnormality and survival of the goat spermatozoa. The spermatozoa abnormality was significantly higher in the lactate ringer treatment (6.26%) than any other treatment. Similarly,                  the survival of the goat spermatozoa in the dextrose ringer and NaCl treatment were significantly larger (77 and 80.5%) than that in the lactate ringer treatment (66,3%).
KOMPOSISI DAN EFISIENSI PENGENDALIAN GULMA PADA PERTANAMAN KEDELAI DENGAN PENGGUNAAN BOKASHI Hidayati Mas&#039;ud
Agroland: Jurnal Ilmu-ilmu Pertanian Vol 16, No 2 (2009)
Publisher : Universitas Tadulako

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Abstract

The research aimed at studying the effective way of weeds control and the usage of organic fertilizer in soy cultivation at dry land. The research conducted was from July to September 2007, located in the Laboratory and Experimental Farm of Agriculture Department in Tadulako University, Palu.  The research used a Randomized Block Design with a two Factorial Experiment. The first factor was four different kinds of weeds control (P): without weeds control (p0), manual control using mowing (p1), culture control technique using mulch (p2), and chemical control using oxyfluorofen (p3).  The second factor was three levels of bokashi fertilizers (B): without bokashi (b0), 10 ton ha-1 bokashi (b1), and 20 ton ha-1 (b2).  The results of vegetation analysis 10 weeks after planting showed that 21 kinds of weeds were found consisting of 14 kinds of broad leave classes, 6 kinds of grass classes (graminae) and only a kind of sedges class (cyperaceae). The results indicated that the efficiency of the control treatment in controlling weeds was significantly lower than other treatments. The chemical treatment in controlling weeds had similar effect and efficiency as the mulch treatment.  However, the use of mulch has more advantages due to its cost and time efficiencies and environmentally friendly when applied in crop cultivation.
PENGGUNAAN BEBERAPA EKSTRAK TUMBUHAN SEBAGAI INSEKTISIDA NABATI UNTUK PENGENDALIAN HAMA DAUN KUBIS (Plutella xylostella L.) DI KABUPATEN DONGGALA Nurkhasanah Nurkhasanah
Agroland: Jurnal Ilmu-ilmu Pertanian Vol 16, No 2 (2009)
Publisher : Universitas Tadulako

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Abstract

Diamondback moth P. xylostella attack on cabbage crop represents one of the main constraints in the crop development in Donggala regency Central Sulawesi.  Plant extracts as insecticide to control the pest can be developed to overcome the constraint. The research aimed at determining the effectiveness of various plant extracts to suppress P.xylostella . The research was conducted in       a central plantation of cabbage in Nupa Bomba, Tawaeli sub district or Donggala regency, from March to October 2008.  This research used a Randomized Block Design with 5 treatments: K0 = Control (water), K1 = Widuri extract, K2 = Srikaya extract, K3 = Dringo extract and K4 = matador 25 EC insecticide. Each treatment was repeated 4 times giving 20 experimental units. The experimental  parameter observed were (i) density of larva population, and (ii) crop weight per plot. Data were analysis using analysis of variance, whether the treatments were significant, advanced analysis of Duncan Multiple Range Test at 5% significant level was used.  The research results showed that the various plant extracts have significant effect on population density of the larva diamondback moth (P.xylostella) and the cabbage weight.  The largest number of dead larvae  was found in K3 treatment K3 (extract of Dringo leaf).  In the same treatment, the cabbage weight per crop was also higher than any other treatment.
SIFAT FISIKOKIMIA DAN SENSORIS SOHUN INSTAN DARI PATI SAGU Abdul Rahim; Mappiratu Mappiratu; Amalia Noviyanty
Agroland: Jurnal Ilmu-ilmu Pertanian Vol 16, No 2 (2009)
Publisher : Universitas Tadulako

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Abstract

The objectives of the research was to determine a method for making instant sohun from sago starch that has physicochemical and sensory properties of good quality. Optimizing instant sohun process was achieved by applying four different ratios of sago starch : hot water suspension (v/v) (1:0.75; 1:1; 1:1.25; and 1:1.5) and three different levels of cooking time (4, 6, and 8 minutes).             A Completely Randomized design was used for observing the physicochemical properties, water content, cooking rate and cooking loss, while a Randomized Block design for the sensory properties. The research results showed that the sago starch:hot water suspension at a ratio 1: 0,75 (v/v) and           4 minutes cooking time was the best processing condition for making sohun instant from sago starch in which water content was 10.95%, cooking rate was 3.29 minute and cooking loss was 2.13%. While cooking time for 4 minutes resulted in better sensory properties than any other cooking time.
EFFECTS OF DEFAUNATION AND METHIONINE IN THE PRESENCE OF PROTOZOA ON THE FLOW OF MICROBIAL LONG CHAIN FATTY ACIDS FROM THE RUMEN OF SHEEP Damry Damry
Agroland: Jurnal Ilmu-ilmu Pertanian Vol 16, No 2 (2009)
Publisher : Universitas Tadulako

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Abstract

This study was designed to investigate the effects of the presence or absence of protozoa in the rumen, and of methionine supplement when protozoa are present in the rumen, on microbial production of LCFA. The study used 12 first-cross Merino x Border Leicester wethers (2 years old) with body weights of between 35 and 44 kg, each was equipped with both rumen and abomasum cannulas. All sheep were offered a mix of 400 g of oaten chaff + 400 g of lucerne chaff per day which was delivered in 24 equal portions at hourly intervals via an overhead automatic-feeding machine. Digesta flow was measured using chromium ethylenediamine tetra-acetic acid (CrEDTA) complex and dietary acid-insoluble ash (AIA) as the liquid- and particle-digesta marker, respectively. All sheep were firstly defaunation using detergent alkanate 3SL3, and 8 of them were refaunated with a fresh rumen liquid obtained from a normal donor animal. Thus, there were 8 animals in the refaunated group at the commencement of study, 4 of which were intended to receive methionine supplement. However, comparison of refaunated sheep with or without methionine supplement is based on only 3 sheep per cell; 2 animals (1 of the methionine-supplemented and 1 of the methionine-unsupplemented group) were suitable to be included in the analysis. Comparison of defaunated and refaunated sheep was based on 4 sheep per cell. The study showed that the daily flow of dry matter through the abomasum was higher (P<0.05) in refaunated animals, despite the lower liquid outflow rate in these sheep. The concentration of LCFA in total digesta dry matter was not affected (P>0.05) by the presence or absence of protozoa in the rumen. However, the presence of protozoa increased concentration of LCFA in particle-digesta dry matter (P=0.081), the ruminal production (P<0.05) and daily flow of LCFA (0.01). Methionine supplementation did not alter (P 0.05) the concentration of LCFA in digesta, but significantly reduced (P<0.05) the flow of LCFA to abomasum.
PENGUJIAN EFEK PENGHAMBATAN EKSTRAK DAUN WIDURI TERHADAP PERTUMBUHAN LARVA Spodoptera exigua Hubn. (Lepidoptera: Noctuidae) DENGAN MENGGUNAKAN INDEKS PERTUMBUHAN RELATIF Shahabuddin Shahabuddin; Flora Pasaru
Agroland: Jurnal Ilmu-ilmu Pertanian Vol 16, No 2 (2009)
Publisher : Universitas Tadulako

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Abstract

The study was conducted to evaluate the growth inhibition effect of leaf extract ofCrown plant (LEC), Calotropis gigantean, at various concentrations (5%, 4%, 3%, 2 %, 1 %, and 0% )on S. exigua larvae. Inhibition effect was quantified by using growth (GI) and relative growth (RGI)indexes which have some advantages compared to other insect growth parameters. The results showedthat the growth inhibition effect of the leaf extract of C. gigantea could be detected using the GI andRGI. The RGI values decreased with increasing of the extract concentration and the LC50 value ofLEC to S. exigua was about 2.42 %. The results suggested that C. gigantea extracts contain insectgrowth inhibitor substance.Key words: Calotropis gigantea, growth inhibition effect, relative growth index, Spodoptera exigua.
PENGARUH BERBAGAI KONSENTRASI INOKULUM Lactobacillus plantarum TERHADAP TINGKAT KELANGSUNGAN HIDUP IKAN PATIN (Pangasius hypophthalmus Sauvage) Atira Atira
Agroland: Jurnal Ilmu-ilmu Pertanian Vol 16, No 2 (2009)
Publisher : Universitas Tadulako

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Abstract

The objective of this research was to find out the maximum concentration of L. plantarum inoculums capable of sustaining 100% survival of catfish. The research was conducted by laboratory experiments using a Completely Randomized Design method. The experimental results were examined by Analysis of Variance and an Advanced Duncan’s double test. The inoculums concentrations were 0, 10, 20, 40, and 80 mL/2 L water. Each treatment was repeated three times. The catfish for the experiment was 2 months old, length about 6 cm, and weight about 2 g. Every aquarium in the experiment contained 2 L of water. The testing parameter was the number of fish that can survive    for five days.  Additional experimental data obtained was the water quality (DO, pH, temperature, ammoniac, and nitrate). The experimental results showed that 100% survival of catfish occurred in the inoculums concentrations of 0 (kontrol), 10, and 20 mL. At the inoculums concentrations of both   40 and 80 mL, the catfish survival were greatly reduced to only 8.33 and 0%, respectively.
PROFIL DAN PROSPEK BISNIS MINYAK DARA (Virgin Coconut Oil/VCO) DI KABUPATEN CILACAP Anny Hartati; Altri Mulyani
Agroland: Jurnal Ilmu-ilmu Pertanian Vol 16, No 2 (2009)
Publisher : Universitas Tadulako

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Abstract

Cilacap regency is an area significantly potential for virgin coconut oil (VCO) business development. Mostly consisted of coastal areas where coconut trees are abundant, it can support the development of VCO business as the needed raw materials can be met easily. The research aims were to identify the profile business of VCO in Cilacap regency and the level of profit the business making from VCO, to determine the amount of inputs used in the business and the efficiency of the inputs, to determine the efficiency of making VCO business, to determine the added value gain from VCO business, to determine labors absoRp.tion from VCO business and to identify the potential VCO business in the future based on the business strengths, opportunities, weaknesses and challenges. The research material included were the VCO business data, production factors, products number, production costs, product price, productivity, and profitability. A survey method was used in which samples were puRp.osively taken. The targets were 25 VCO households industry in Cilacap regency which are partners of Department of Forestry and Plantation of Cilacap Regency. Data analysis used were descriptive analysis, the analysis of costs and revenue, the analysis of R/C ratio, the analysis of B/C ratio, the analysis of Return on Investment (ROI), the analysis of Break Even Point (BEP), and the value added analysis. The mean benefit cost ratio (B/C ratio) and VCO ROI on agroindustry were 0.318 and 31.77%, respectively, indicating that the VCO agro industry in this research area has the ability to create benefit. The added value of the agroindustry was IDR 1,376 per unit generated from the labor component (12.86%), the input (49.52%), and the profits (37.62%). The labor absoRp.tion during production process was varied from 75 HKSP to 320 HKSP, with an average of 129,20 HKSP. The strategies of VCO agro industry development in the future need to consider the potential strengths, opportunities, weaknesses and challenges the business encounters as found in the research. The prospective of VCO business development in Cilacap is thus very promising.

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