Influence of establishment methods, irrigation water levels and weed-management practices on growth and yield of rice (Oryza sativa)

摘要

A field experiment was conducted during rainy (kharif) and winter (rabi) seasons of of 2012-13 and 2013-14 at the Indian Institute of Rice Research (IIRR), Hyderabad, Telangana, in clay loam soils, to evaluate the influence of different establishmenttechniques, irrigation water levels and weed-management practices on productivity, growth and yield of rice (Oryza sativa L). System of rice intensification (SRI) was significantly superior to conventional and mechanized transplanting for grain yield (6.10 and 6.47 t/ha), yield attributes like panicles/m2 (376 and 405), panicle weight (4.6 and 4.9 g), 1,000-grains weight (17 and 18 g) and growth parameters like leaf area (2,743.6 and 2,820.5 cm2/hill) and effective tillers/m2 (470 and 482) during kharifand rabi respectively, in both the years. Alternate wetting and drying (AWD) and cono-weeding recorded significantly higher growth and yield parameters over the other irrigation and weed-management practices, respectively, due to profuse root growth andaerated condition.