EFFECT OF NITROGEN LEVEL AND TIME OF APPLICATION ON YIELD AND WATER USE EFFICIENCY OF AEROBIC RICE
Journal Title: International Journal of Agriculture Sciences - Year 2017, Vol 9, Issue 3
Abstract
Rice is the most important staple food crop. Aerobic rice is a new method of growing rice characterized by direct seeding condition without standing water. Nitrogen nutrition is the major agronomic practice that affects the yield and quality of rice crop. Water use efficiency or water productivity is the ratio of grain yield to total water input was found to be increasing with the increasing levels of nitrogen. Significantly higher water use efficiency was noticed with the application of 125 kg N ha-1 (57.59 kg hacm-1) followed by application 100 kg N ha-1 (53.43 kg hacm-1) and significantly superior over 75 kg N ha-1 (49.00 kg hacm-1). Application of nitrogen in 4 splits (25%N at basal dose + 25% N at tillering + 25% N at PIstage +25%N at PE) resulted in higher water use efficiency (59.32 kg hacm-1) followed by 3 splits application (33 % N at basal dose + 33% N at tillering +33 % N at PI stage) (55.71 kg hacm-1) and lower water use efficiency was with nitrogen in 2 splits (50 % N at 15 DAE + 50 % N at PI stage) (47.23 kg hacm-1).
Authors and Affiliations
NARAYAN HEBBAL
Keywords
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