Effect of irrigation regimes on water saving, growth and yield of rice under lowland condition.

摘要

Field experiments were conducted at wetland farm of Tamil Nadu Agricultural University, Coimbatore, India, to study the impact of irrigation regimes and plastic film mulches in lowland rice during wet season 2001 and 2002. The experiment was laid out in split plot design with three irrigation regimes allotted to the main plots and the combination of mulching and nitrogen management allotted to the sub-plots. The results revealed that continuous submergence recorded higher LAI, productive tillers, grain and straw yield compared to alternate wetting and drying regimes. Alternate wetting and drying regimes recorded longer roots, whereas continuous submergence recorded more root volume and root dry weight. The consumption of water was more under continuous submergence compared to alternate wetting and drying regimes. However, water use efficiency was higher under alternate wetting drying regimes. Saving of more amount of water recorded under plastic mulched plot.