Impact of Weather on the Yield and Stability of Rice Genotypes Under SouthWest Monsoon Conditions

摘要

A field experiment to study the response of thirty five rice genotypes to varying environmental conditions was conducted on sandy loam soil of Seed Research and Technology Centre, PJTSAU, Rajendranagar,Hyderabad during south west monsoon season, 2013.Three replications of all the genotypes were consistently transplanted on lrdJuly, lS'Muly, and 30thJuly, in randomized block design. It was established that all the thirty five genotypes were responsive to favourable environments irrespective of datesof transplanting. However, the genotype NLR 40058 produced significantly more yield in all the three dates of sowing and it was highest 5.04 t ha~(-1) when transplanted on 15th July. The genotype RNR 6841 yielded lowest (1.90 t/ha)when transplanted on 15thJuly, and trends were same for Is'and 30th July. The study indicated that rice sown on 15th July is exposed to favourable macro and micro conditions as compared to P'and 30thJuly transplanted crops. Also, adequate sunshine and congenial air temperatures during the reproductive stage of NLR 40058 resulted in highest yield.