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Journal : jurnal agrotropika

 1 
PERANAN POHON PELINDUNG DALAM MENENTUKAN PRODUKTIVITAS KOPI Rusdi Evizal; Tohari Tohari; Irfan Dwija Prijambada; Jaka Widada
JURNAL AGROTROPIKA Vol 17, No 1 (2012): Agrotropika Vol.17 No.1 2012
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (356.059 KB) | DOI: 10.23960/ja.v17i1.4276

Abstract

Shade trees of legume in par-ticular have ecological function such as litter fall production, N fixation, nutrient acquisition from deep soil, and shade provision. Shade trees may influence coffee bean yield both increasing and decreasing the yield. To evaluate the role of shade trees in determining coffee yield, the experimental plots were constructed at benchmark site of Conservation and Sustainable Management of Below-Ground Biodiversity (CSM-BGBD), in Sumberjaya Subdistrict, West Lampung, Indonesia. Shade trees of Coffea canephora agro-ecosystems to be examined were Gliricidae sepium, Erythrina sububrams, Michelia champaca, and no shade. The results showed that agro-ecosystem shaded with Gliricidae sepium, Erythrina sububrams, Michelia champaca gave positive return of N, P, K. Total N from litter fall of shade trees and level of shading had quadratic regression with coffee yield. Shading on July significantly determined coffee yield with negative coefficient. Key words: shade tree, coffee yield, litter fall, level of shading
RESPON TANAMAN JAGUNG TUMPANGSARI KACANG HIJAU TERHADAP PERLAKUAN PARIT PADA LAHAN KERING Edy Edy; Tohari Tohari; Didik Indradewa; Dja’far Shiddieq
JURNAL AGROTROPIKA Vol 16, No 1 (2011): Agrotropika Vol.16 No.1 2011
Publisher : Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (309.122 KB) | DOI: 10.23960/ja.v16i1.4264

Abstract

Water management in rainfed drylands are very important to consider. Limited water on dry land can be anticipated with rain harvesting technologies such as by making the trench. To further optimize land with soil moisture, maize intercropping with mungbean. This study aims to determine the effectiveness of trench system with intercropping maize with mungbean. The research was conducted in Village of Wareng, sub District of Wonosari District of Gunungkidul Province of D.I. Yogyakarta, during November 2010 until February 2011. This study was designed using the Randomized Split Plot. The main plot is a trench system consists of three types: Without a trench (Control, P0), the Trench (P1), the Trenches+organic material (P2). Subplot is the cropping pattern consists of two types: Corn monoculture (J) and mungbean intercropping maize (J + H). Maize tested were Bima-2 Bantimurung varieties most resistant to drought conditions based on previous research. The results showed that the combination of trench + organic materials and intercropping patterns can increase maize leaf area index about 40%. The yield obtained maize intercropped with mungbean on the treatment of trench + organic materials with about 6.258 ton ha-1 of corn and 0.418 ton ha-1 of mungbean while in the trench treatment without organic material 4.829 t.ha-1 of corn and mungbean 0.369 ton ha-1. Efficiency of water use in intercropping maize and mungbean increased about 60.8%; Intercropping maize and mungbean in the treatment of trench + organic materials and trench without organic material increased the land equal ratio about 76.05% and 40.70% respectively. Key words: trench, intercropping, maize, mungbean, dryland.
Co-Authors Didik Indradewa Dja’far Shiddieq Edy Edy Irfan Dwija Prijambada Jaka Widada Rusdi Evizal Subowo G. Yustisia Yustisia