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Jurnal Agro Teknologi Tropika
Published by Universitas Riau
ISSN : -     EISSN : 23376562     DOI : -
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Jurnal Agroteknologi Tropika memuat hasil-hasil penelitian mutakhir (5 tahun terakhir), ulasan singkat (review), analisis kebijakan atau catatan penelitian singkat (research note) mengenai teknik percobaan, alat, pengamatan, dan hasil awal percobaan (preliminary result) terkait bidang Ilmu Pertanian seperti : Agronomi, Pemuliaan Tanaman, Ilmu Tanah, Proteksi Tanaman, Mikrobiologi Pertanian, dan bidang ilmu pertanian terkait lainnya. Jurnal Agroteknologi Tropika terbit dua kali dalam setahun pada bulan Januari dan Juni.
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Articles 4 Documents
 1 
Search results for , issue " Vol 1, No 1 (2012)" : 4 Documents clear
Pengaruh Fungi Mikoriza Arbuskular Dalam Medium Zeolit Terhadap Pertumbuhan dan Intensitas Penyakit Bercak Daun Pada Bibit Kakao Sariasih, Yenny; Hadisutrisno, Bambang; Widada, Jaka
Jurnal Agro Teknologi Tropika Vol 1, No 1 (2012)
Publisher : Jurnal Agro Teknologi Tropika

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Abstract

In Indonesia, cocoa (Theobromae cacao L.) is one of the nations third-largest contributor of foreign exchange, but the problem that arises on cocoa plantations in Indonesia is the difficulty of obtaining a healthy cacao seedlings in large numbers for the rejuvenation of cocoa cropping. One of methods to obtained healthy cacao seedlings with good performance in large numbers is application of arbuscular mycorrhizal fungi (AMF). This researches aims to observe the role of AMF mass production in the zeolite medium on the growth and leaf spot intensity of cocoa seedlings. The researches were conducted at the field condition in Sleman, Yogyakarta and Mycological Laboratory of the Faculty of Agriculture and the Laboratory of Phytochemistry, Faculty of Pharmacy, University of Gadjah Mada, Yogyakarta. The main ingredient of the study is AMF mass production in the zeolite medium. The observed variables were the growth of cocoa seedlings, the number of spores from each location, the cocoa seedlings height, leaf numbers, wet weight, dry weight and root length of seedlings of cocoa, symptom and intensity of leaf spot disease, detection of salicylic acid (SA) manually and TLC methods, and environmental factors which include: temperature, humidity and light intensity. The results indicated that the only real difference in the height and number of leaves, whereas other variables were not significantly different. This is because AMF spores from all locations are derived from the similarity of the two genera, namely Glomus sp., and Gigaspora sp., and was almost the same amount. Leaf spot disease symptoms appeared only a few of the cocoa seedlings, but more due to unfavorable environmental factors and conditions are weak pathogens. Plant defense responses had not been established because the salicylic acid content in leaves of cocoa seedlings at 12 weeks has not been detected.
Respon Pertumbuhan Bibit Kelapa Sawit (Elaeis guineensis Jacq.) Pada Medium Gambut Dengan Berbagai Periode Penggenangan , Nurbaiti; Yulia, Arnis En; Sitorus, Jujung
Jurnal Agro Teknologi Tropika Vol 1, No 1 (2012)
Publisher : Jurnal Agro Teknologi Tropika

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Abstract

The research has conducted at the green house of Faculty of Agriculture, Riau University from September 2011 toDecember 2011, to study the growth response of palm oil seedling on peat soil with different flooding periods. Theexperimental units were arranged in Completely Randomized Design (CRD) with three treatment flooding periods and sixreplications. Three flooding periods were: no flooding, 5 days of flooding period and 10 days of flooding period. The datawere analyzed by ANOVA and Duncan’s New Multiple Range Test. (DNMRT) at level 5%. The result showed that theperiodical flooding inhibited the enhancement of plant height, leaves number, stem diameter, primary roots number, rootvolume and dry weight palm oil seedlings but enhanced shoot the root ratio. Palm oil seedling could survive by periodicalflooding condition by forming adventitious roots. The number of adventitious roots in the 10 days flooding period weresignificantly different from these the 5 days flooding.
Pemberian Pupuk Anorganik dan Air Pada Tanah Gambut Terhadap Pertumbuhan Kelapa Sawit di Pre-Nursery , Gusmawartati; , Wardati
Jurnal Agro Teknologi Tropika Vol 1, No 1 (2012)
Publisher : Jurnal Agro Teknologi Tropika

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Abstract

The objective of this research was to study the optimal waters requirement of palm oil seedling at pre-nursery peatsoil which is applied with in-organic fertilizer to enhance growth of oil palm on pre-nursery in peat soil. The research hasconducted on peat soil growth media, taken from Desa Rimbo Panjang Kab. Kampar, Province of Riau. The experimentalunits were arranged in Factorial Completely Randomized Design with three replications. The first factor is: 0, 1⁄2 and 1times of recommended dosage. The second factor is: 2, 3 and 4 (times/day) of watering. Parameters studied were anincrease seedling height, number of leaves and stem diameter. The results showed that application of in-organic fertilizerwith 1 time of recommended dosage in 2 times of watering/day in trended to give the best growth of oil palm seedlings,which was equal to growth standard recommended by the Indonesian Palm Oil Research Center.
Perubahan Fraksi P-Inorganik dan P-Organik Pada Bahan Tanah Gambut Yang Diaplikasi Dengan Fosfat Alam Pada Kondisi Kapasitas Lapang dan Tergenang , Nelvia; Sabiham, Supiandi; Anas, Iswandi
Jurnal Agro Teknologi Tropika Vol 1, No 1 (2012)
Publisher : Jurnal Agro Teknologi Tropika

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Abstract

The very high acidity of peat soil is mainly caused by high H+ concentration that can change the base cation likeK , Na+, Ca+ and Mg2+ from mineral/rock structure. The research was conducted in laboratory of the Departement ofSoil Science, Faculty of Agriculture, IPB. Peat soils at hemic degree of decomposition level were taken from Riau. Rockphosphates in this research (P and Fe sources) were the rock phosphates of Huinan China, Christmas Island and PTPetrokimia Gresik the content 32,65; 31,28 and 25,02% of P 2 O 5 and 2,28; 11,19 and 18,72% of R 2 O 3 (Fe 2 O 3 + Al 2 O 3 )respectively. The aims of the research were to study the changes of the forms of readily labile inorganic-P and organic-P,moderately labile inorganic-P and organic-P and non labile organic-P in peats after being incubated with rockphosphates. The results showed that the application of rock phosphates in peat soil increased the readily of labileinorganic-P and organic-P, moderately inorganic-P and organic-P, and non labile P forms. An increase of non labile Pand moderately labile P were higher dye to the R 2 O 3 content of rock phosphates became higher in saturated and fieldcapacity condition. The results also showed that the rock phosphates applied to the peat soil released P in a very highamounts, in the order of rock phosphates of Huinan China > Christmas Island > PT Petrokimia Gresik. Released P wasdetermined by water extraction which increased with the periods of incubation with the similar pattern on the three typesof rock phosphates.

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