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Date
2018-07-30
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UNIVERSITY OF AGRICULTURAL SCIENCES RAICHUR - 584 104
Abstract
A field experiment was carried out at Agricultural Research Station, Dhadesugur, during kharif 2017 to study the influence of different establishment methods and irrigation management on dry matter accumulation in rice (Oryza sativa L.). SRI method of rice establishment and AWD of irrigation practice registered significantly superior performance in terms of plant height, tiller production, LAI and dry matter production, at all the crop growth stages over rest of over the rest of the establishment methods. Similar trend was observed with Yield attributes viz., total number of grains panicle-1, panicle length , test weight and no of productive tillers hill-1. DSR and critical stage of irrigation approach recorded lower values in above mentioned parameters. Days to panicle initiation, days to 50 per cent flowering and days to physiological maturity were early in DSR followed by SRI method and transplanted rice took more number of days. Among irrigation methods critical stage approach took lesser days to panicle initiation, days to 50 per cent flowering and days to physiological maturity where as farmer’s irrigation practice takes more days. SRI method of rice establishment practice registered significantly superior performance in terms of NDVI values, photosynthetic rate, chlorophyll content, at all the crop growth stages over the rest of the establishment methods but leaf temperature and transpiration rate were higher in DSR followed by SRI method whereas, transplanted recorded lower leaf temperature and lower transpiration rate. Among irrigation methods NDVI values, photosynthetic rate, chlorophyll content, were higher in AWD followed by farmer’s irrigation practice and lower values were recorded in critical stage approach at all the crop growth stages. Leaf temperature and transpiration rate were higher in critical stage approach followed closely followed by AWD and lower leaf temperature and lower transpiration rate recorded in farmers irrigation practice. Root attributes viz., root volume, root length, and root dry matter were significantly superior in SRI method followed by DSR rice. Among irrigation methods AWD recorded higher yield attributes followed by farmer’s irrigation practice and lower values were recorded in critical stage approach.
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