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INDONESIA
Jurnal Agrista
Published by Universitas Syiah Kuala
ISSN : 14103389     EISSN : 25979973     DOI : -
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Jurnal Agrista merupakan salah satu wadah bagi peneliti untuk menyebarluaskan hasil-hasil penelitian di bidang ilmu Agroteknologi, Ilmu Tanah dan Proteksi Tanaman, selain itu Jurnal Agrista juga mencakup di bidang MIPA Biologi serta FKIP Biologi. Jurnal Agrista memuat laporan hasil penelitian atau makalah suntingan dengan topik Agroteknologi, Ilmu Tanah, serta Hama dan Penyakit Tumbuhan dari staf pengajar/peneliti di Fakultas Pertanian, Universitas Syiah Kuala Banda Aceh dan peneliti lainnya yang berasal dari Perguruan Tinggi Negeri dan Swasta serta Balai Penelitian.
Arjuna Subject : -
Articles 9 Documents
 1 
Search results for , issue "Vol 12, No 2 (2008): Volume 12 Nomor 2 Agustus 2008" : 9 Documents clear
Komunitas Mikrofungi pada Lapisan Horizon Serasah Acacia mangium Samingan Samingan; Lisdar I. Sudirman; Dede Setiadi; Alex Hartana; Budi Tjahjono
Jurnal Agrista Vol 12, No 2 (2008): Volume 12 Nomor 2 Agustus 2008
Publisher : Fakultas Pertanian, Universitas Syiah Kuala

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Microfungal Community on Litter Horizon Layer of Acacia mangiumABSTRACT. Fungal diversity on litter horizon layer of Acacia mangium were investigated to examined fungal species and fungal community on each litter horizon layer, and also to examined relationship between organic content of litter and fungal community. Twenty two species were isolated from three litter horizon layer with dilution method. Total fungal population on five years old A. mangium standing was higher than two years old, whereas on logging former area was low. Total fungal population on standing two and five years old were highest on L layer follow by F and H layer, but on logging former area were highest F layer followed by L and H layer. Aspergillus was dominate on H layer in almost of sampling collection area, beside that Aspergillus and Penicillium were found also on L and F layer. Generally L and F layer dominated by Sp7, Sp5, Sp20, and Sp22. The highest diversity indice on two years old standing was found at different layer.; L and H on health and Genoderma attacked standing, whereas on standing five years old, highest diversity indices was found at L layer, but on logging former area highest diversity indices was found at H layer.
Persistensi Herbisida Clomazone dan Pendimethalin pada Tanaman Kedelai Kultivar Argo Mulyo Hasanuddin Hasanuddin; Elly Kesumawati; Jumini Jumini
Jurnal Agrista Vol 12, No 2 (2008): Volume 12 Nomor 2 Agustus 2008
Publisher : Fakultas Pertanian, Universitas Syiah Kuala

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Abstract

The Persistence of Clomazone and Pendimethalin Herbicides in Soybean Cultivar of Argo MulyoABSTRACT. A field research has been conducted in PT. Syngenta RD Station Cikampek, Karawang to investigate the persistence of clomazone and pendimethalin herbicides in soybean cultivar of Argo Mulyo. The dosage of clomazone and pendimethalin herbicides used were: 0.75; 1.50; and 2.25 kg a.i. ha-1. The persistence of clomazone and pendimethalin herbicide varied from 28 to 96 days and 43 to 75 days, respectively. The persistence of clomazone herbicide was longer than the of pendimethalin.
Perbandingan Object Oriented Classification dan Maximum Likelihood Classification pada Pemetaan Penutupan Lahan di Kabupaten Gayo Lues Muhammad Rusdi
Jurnal Agrista Vol 12, No 2 (2008): Volume 12 Nomor 2 Agustus 2008
Publisher : Fakultas Pertanian, Universitas Syiah Kuala

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Abstract

Comparison of object Oriented Classification With Maximum Likelihood Classification on Land Cover Maaping in District of Gayo LuesABSTRACT. Image classification method used critically effects the classified image produced as well as its accuracy. One of the recently introduced classification methods is Object-Oriented Classification (OOC). The fundamental difference between this method and that of Maximum Likelihood Classification (MLC) lies on the basic unit of image analytical prosses, i.e., image object or segment, and not on a single pixed. The new classification method uses a segmentation procedure with a hierarchical approach which allows an addition of an object  characteristic to other information related  to the classified object, such as from, texture, and context. This object or segment is formed because the smallest region has a larger area than the image pixel. In this study, MLC and OOC classification methods were compered using Landsat ETM+ image for Gayo Lues District of Aceh. The objective of this study was to map out land cover/ landuse classes of the research area and compare the result and its accuracy using the MLC and OOC classification methods. Result  of the study showed that a higher, more detailed, hierarchical land cover/ landuse class with a higher accuracy was obtained using OOC classification method which corresponds better to the contextual condition in the field compared to that of the pixel- based classification method.
Implikasi Keberadaan Spesies Invasif Eceng Gondok Terhadap Komunitas Srangga Herbivor Sapdi Sapdi
Jurnal Agrista Vol 12, No 2 (2008): Volume 12 Nomor 2 Agustus 2008
Publisher : Fakultas Pertanian, Universitas Syiah Kuala

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Abstract

Implication of the Existance of Invasive Species-Water Hyacinth on Communities of Herbivorous InsectABSTRACT. The introduction of an invasive exotic plant species may indirectly influence herbivorous insects community. The objective of the research is to evaluate the implication of the existence of invasive species-water hyacinth on herbivorous insect community. The research was done in several freshwater ecosystems occupied by water hyacinth in West Java and DKI Jakarta, conducted during January 2004 to March 2006. Sweep net and yellow pan trap were used to collect the sample of insects. The result of the research showed that the existence of water hyacinth may indirectly resulted in decreasing of species richness and diversity of herbivorous insect. The observation also showed that the existence of water hyacinth may lead to homogenezation of the insect in aquatic vegetation.
Pertumbuhan, Perkembangan Perakaran, dan Hasil Kecang Hijau pada Tiga Sistem Olah Tanah di Lahan Sawah Irigasi yang Di Pupuk P Kuswanta Futas Hidayat
Jurnal Agrista Vol 12, No 2 (2008): Volume 12 Nomor 2 Agustus 2008
Publisher : Fakultas Pertanian, Universitas Syiah Kuala

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Abstract

Root Growth, Development and Yield of Mungbean in Various Soil Tillage Systems on Irrigated Low Land Fertilized by PABSTRACT. The experiment was carried out to observe root growth and development, and yield of mungbean (Vigna radiata (L.) Wilczek) on irrigated low land as a result of P dosages application and various soil tillage systems. Field experiment was carried out at Kedaloman village, Tanggamus regency of Lampung Province. Field experiment used a split plot pattern in randomized block design. The main plot were soil tillage systems which consisted of tree levels, those were intensive tillage, maximum tillage and no-tillage; and subplot was P dosages which consisted of four levels, those were 0, 9.9, 19.8, and 29.7 kg ha-1 P. The experiment result showed that soil tillage system had no significant effect on length and number of root, volume of root nodule. The highest yield of dry grain was 1.545,1729 g (1,9315 ton ha-1) obtained at optimum dosage 18,0740 kg ha-1 P.
Temperature Gradients and Their Effects on The Interaction of an Insect Host Plodia interpunctella and Its Parasitoid Venturia canescens Jauharlina Jauharlina
Jurnal Agrista Vol 12, No 2 (2008): Volume 12 Nomor 2 Agustus 2008
Publisher : Fakultas Pertanian, Universitas Syiah Kuala

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Abstract

Pengaruh Gradien Suhu Terhadap Interaksi Serangga Inang Plodia interpunctella dan Parasitoid Venturia canescensABSTRAK. Pengaruh suhu merupakan hal yang penting dalam mengamati hasil interaksi serangga inang dengan parasitoid, terutama dalam menentukan tingkat keberhasilan perkembangan parasotoid tersebut. Untuk mengetahui pengaruh perubahan suhu terhadap interaksi inang dan parasitoid, telah dilakukan penelitian di laboratorium terhadap parasitoid Venturia canescens (Gravenhorst) (Hymenoptera: Ichneumonidae) dan inangnya, Plodia interpunctella (Hubner) (Lepidoptera: Pyralidae). Gradien suhu 28-240C; 28-260C;  dan 28-280C digunakan dalam suatu sistem terdiri dari instar V P. interpunctella yang telah diparasit oleh V. canescens. Penggunaan gradient suhu yang berbeda dalam penelitian ini berarti perubahan suhu dari 280C, dimana serangga parasitoid dibiakkan sebelumnya ke suhu yang lebuih rendah, yaitu 24 dan 260C. Serangga inang yang digunakan dalam percobaan ini merupakan biakkan yang telah mapan pada suhu rendah tersebut. Hasil penelitian menunjukkan bahwa begaian inang yang terparasit berhasil menjadi imago parasitoid V. canescens. Gradien suhu yang berbeda tidak berpengaruh terhadap jumlah imago parasitoid yang muncul dan tingkat enkapsulasi. Waktu perkembangan yang dibutuhkan parasitoid meningkat secara signifikan dengan menurunnya gradient suhu. Dibutuhkan waktu 26,76 hari dan 22,96 hari bagi parasitoid untuk berkembang pada gradient suhu 28-240C dan 28-260C, dibandingkan hanya 21,20 hari pada suhu konstan 28-280C. Perubahan suhu dari 28 ke 240C, dan dari 28 ke 260C meningkatkan tubuh parasitoid sampai 1,54 dan 1,52 mm, dibandingkan dengan 1,47 mm pada suhu 28-280C. Hasil penelitian ini menunjukkan bahwa parasitoid V. canescens dapat berkembang dengan baik pada gradient suhu yang lebih rendah selama interaksi dengan inang P. interpunctella, mengikuti serangga inang yang terlebih dahulu sudah mapan pada suhu rendah yang sama.
Efektivitas Mikoriza Arbuskula dan Naungan pada Pertumbuhan Bibit Jati (Tectona grandis) Delvian Delvian
Jurnal Agrista Vol 12, No 2 (2008): Volume 12 Nomor 2 Agustus 2008
Publisher : Fakultas Pertanian, Universitas Syiah Kuala

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Abstract

Effectiveness of Arbuscular Mycorhiza and Shanding in Growth of Teak SeedlingABSTRACT. Interaction between mycorrhizal inoculan dosage with level of shade was significantly affected of seedling growth of height, total dry weight matter, soot root ratio, P content, and degree of infected root by mycorrhizal. The usage of mycorrizal inoculants dosage at 10 g per seedling which combined with level of shade 75% gave the best for seedling growth of teak for siz moth old. Increasing level of shade 25% to 75% increased seedling growth of teak. Furthermore, seedling of teak that treated mycorrzal inoculants dosage at 100 g per seedling was more significantly affected of seedling growth than 5 g per seedling.
Uji Daya Ketahanan Beberapa Varietas Cabe Merah (Capsicum annum L.) Terhadap Penyakit Antraknose (Gloeosporium piperatum Ell. et. Ev.) Rosmayati Rosmayati
Jurnal Agrista Vol 12, No 2 (2008): Volume 12 Nomor 2 Agustus 2008
Publisher : Fakultas Pertanian, Universitas Syiah Kuala

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Abstract

Testing of Some Varieties to Antracnose Diseases (Gloeosporium piperatum Ell. et. Ev.)ABSTRACT. One of the limiting factors to develop chilly in Indonesian is antracnose disease. This fungi attacked either young or mature of pod chilly. It was caused by Gloeosporium piperatum. This study were carried out in green house, Faculty of Agriculture, University of North Sumatera. The objective of this research is to find the resistant varieties to antracnose disease and high yield performance. This study arranged in Randomized Block Design (RBD) with 3 replications, respectively. The result showed that varieties King, TM-999, Kingehili, and Taro were more resistant to antracnose disease. While, Northredstar expressed slightly resistant, Taro, Northrestar, King, Kingehili dan TM-999, produced the highest, while Laris produced the lowest yield.
Penggunaan Metode Bioassay untuk Mendeteksi Pergerakan Herbisida Pratumbuh Ametrin dan Diuron dalam Tanah Nanik Sriyani; Abdul Kadir Salam
Jurnal Agrista Vol 12, No 2 (2008): Volume 12 Nomor 2 Agustus 2008
Publisher : Fakultas Pertanian, Universitas Syiah Kuala

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Abstract

The Use of Bioassay to Detect the Movement of Ametryne and Diuron Herbicides in the SoilABSTRACT. This study is the third step from a series of studies aim to develop method to detect the present and quantity of herbicides in soil and water through a simple, easy, cheap, but accurate bioassay technique. Bioassay is a method which measure response of living organism to determine the presence or quantity of substances in a sample on medium, such as soil, water, and other materials. In this study, bioassay developed in the earlier studies was used to detect movement of ametryne and diuron herbicides in soil. Study was carried out using soil column method. Treatment were arranged factorially in a completely randomized block design with 3 replicates. Two ultisol soil types: Podsolik Merah Kuning (PMK) and Latosol cokelat (LC), and 2 preemergence herbicides: ametryne and diuron were tested. To calculate the amoung of herbicide using bioassay, each standard curve for ametryne and diuron (relationship between the growth of indicator plant as a respon of the amount of herbicide) were developed. Using these standard curves, the amount of ametryne and diuron was calculated based on the growth rate of indicator plant. Result showed that bioassay method can be utilized to detect herbicide movement in soil. The amount and the rate of herbicides movement was determined by soil and herbicide types. In PMK, ametryne was detect at the all soil dept from 1 through 4 week after application (WAA), however at 8 WAA this herbicides was only detected in 20-40 cm soil depth in limited amount, while at 12 WAA there was no ametryne detected in all soil depth. In LC, ametryne was also detected at all soil depth 1 day after application (DAA) through 1 WAA, while at 2 through 4 WAA ametryne was detected at 0-30 cm soil depth. At 8 and 12 WAA there was no more ametryn detected in all soil depth. The movement of diuron herbicide was more restricted compared to ametryn, both in PMK or LC. In PMK, from DAA 1 through 4 WAA diuron was only detected at 0-20 cm soil depth. At 8 WAA this herbicide was found at 10-20 cm soil depth, while at 12 WAA there was no diuron detected in all soil depth. In LC, most of diuron applied was still present in the upper soil colom (0-10 cm), while at 10-20 cm soil depth this herbicide was present in the limited amount 1 DAA through 1 WAA, diuron was detected only at 0-10 cm soil depth, meanwhile from 4 through 12 WAA there was no diuron detected at all soil depth.

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