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All Journal Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy)
Yulianti Ramdiani
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Agriculture, Biological Sciences & Forestry Economics, Econometrics & Finance

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Defisit Evapotranspirasi sebagai Indikator Kekurangan Air pada Padi Gogo (Oryza sativa L.) Eko Sulistyono; , Suwarto; Yulianti Ramdiani
Indonesian Journal of Agronomy Vol. 33 No. 1 (2005): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (156.075 KB) | DOI: 10.24831/jai.v33i1.1509

Abstract

The research was conducted to study the correlation between deficit of evapotranspiration and yield decreasing.   Factorial experiment was arranged in Randomized Block Design.  First factor was irrigation frequency of 1, 2, 4 and 6 days.  Second factor were nine upland rice lines.  Evapotranspiration was measured with simple lysimeter based on water balance. There was positive correlation between deficit of evapotranspiration and yield decreasing. Defisit of evapotranspiration as much as 240.06 mm caused yield decreasing of 90% and dry matter weight decreasing of 72.5%. The relation between total evapotranspiration (E, mm) and dry matter weight (DM, g/plant) was DM = 0.0245 E + 13.85.  Water use efficiency or yield and evapotranspiration ratio correlated with leaf width and sum of seed each panicle  positively .  Increasing leaf width and sum of seed each panicle could increase water use efficiency.    Key Words : evapotranspiration, water use efficiency, upland rice, lysimeter.
Co-Authors Eko Sulistyono Suwarto