CROP GROWTH, YIELD DYNAMICS, SOIL PROPERTIES AND ECONOMICS OF HYBRID RICE (ORYZA SATIVA) AS INFLUENCED BY DIFFERENT ESTABLISHMENT METHODS AND SOWING SCHEDULES UNDER RICE-WHEAT CROPPING SYSTEM IN INDO- GANGETIC PLAINSVikas Sharma, A.S. Bali and Dileep Kachroo
A field experiment was conducted at Jammu during 2008-2009 and 2009-2010 to evaluate the effect of four establishment methods (conventional transplanting of 25 days seedling, dry seeding @ 40 Kg/ha, wet seeding after puddling @ 40 kg/ha and SRI methods) and 4 sowing schedules (15th May, 25th May, 5th June and 15th June,) in hybrid rice (Oryza sativa) under Indo-Gangetic plains. Rice establishment methods and sowing schedules had significant impact on growth, yield attributes and yield of hybrid rice. Direct seeded methods of rice, particularly, wet seeding after puddling was found more effective for realizing maximum potential of majority of growth parameters and yield attributes; and resulted into significantly higher mean grain yield in comparison to the methods involving transplanting of seedlings either by conventional transplanting or SRI method. However, both the direct seeded methods of rice were found at par in respect to grain and straw yields during both the years. Similarly, superiority of 15th June rice sowing schedule over 5th June, 25th May and 15th May sowing schedules was observed for all the growth parameters, yield attributes and grain yield. Establishment methods as well as sowing schedules of hybrid rice did not cause marked effect on soil physico-chemical parameters after rice harvesting during both the years. However, bulk density of soil at 0-15 and 15-30 cm depths was observed minimum in system of rice intensification (SRI) method. Higher net returns and benefit: cost ratio were recorded when rice was established through wet seeding after puddling @ 40 kg/ha and sown on 15th of June during both the years. Based on the findings of two years of investigation it could be concluded that hybrid rice established through wet seeding after puddling sown in second week of June proved profitable, promising, efficient, economical and productive option for rice cultivation under irrigated conditions of Jammu.
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