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All Journal Jurnal Keteknikan Pertanian
Omi Istiawati
Fakultas Pertanian, Universitas Lampung
Agriculture, Biological Sciences & Forestry

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PENGARUH DEFISIT EVAPOTRANSPIRASI DALAM REGULATED DEFICIT IRRIGATION (RDI) PADA KEDELAI (Glycine Max[L.] Merr.) R. A.Bustomi Rosadi; Ridwan .; Nugroho Haryono; Omi Istiawati
Jurnal Keteknikan Pertanian Vol. 20 No. 1 (2006): Jurnal Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.020.1.%p

Abstract

ABSTRACT The objective of this research was to investigate the effect of deficit evapotranspiration in regulated deficit irrigation (RDI) on soybean. This research was conducted on an experimental farm under plastic house of  Lampung Polytechnique from Augustus to Nupember 2004. The deficit evapotranspiration treatment rates were ET1, (1.0XETC), ET2 (0.8XETC), ET4 (0.4XETC) and ET5 (0.2XETC). Arranged in a randomized block design with four reflications. Irrigation was given at two days interval. The regulated deficit irrigation (RDI) treatment just at vegetative period and its treatmens were stopped at the beginning of flowering phase and afterward the treatmens were watered at 1. 0xetc. The soil water content was monitored by porous blocks. The result showed that soybean plant strated to be stressed at week II with qc = 224.03 %, and Ks = 0.60 when watered at o.6xetc. the optimum yield of soybean plant (31.04 g/plant/0 with CWR=200.39 mm was reached by deficit irrigation at 0.8xetc during the vegetative period. Keywords: ultisol, regulated deficit irrigation, soybean, water stress coefficent
Co-Authors Bustomi Rosadi Nugroho Haryono Ridwan Ridwan