National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
A field experiment was conducted during 2012-13 at Department of Agricultural Meteorology, VNMKV, Parbhani (Maharashtra). The agrometeorological indices like GDD and PTU also showed a significant variation among different sowing dates and Bt hybrids of cotton. The average growing degree days were recorded among the different sowing dates was 1556 0days at the base temperature of 15.50C. The highest number of GDD (1649 0days) and PTU (20249 0day hrs) were accumulated in 25th MW sowing followed by 26th MW sowing. The lowest number of GDD (1452 0days) and PTU accumulation was recorded in 28th MW (1452 0days). The total number of GDD was significantly influenced by different hybrids. Among Bt hybrids the highest number of GDD were accumulated by Ajit-155 and Bunny Bt (1561 0days) and the average GDD were accumulated in different hybrids was 1556 0days. The PTU also significantly influenced by different treatments of sowing dates and different hybrids. The highest number of PTU accumulated in 25th MW sowing followed by 26th MW sowing. The lowest number of PTU recorded in 28th MW sowing. Among the hybrids the highest number of PTU recorded in Ajit-155 and Bunny Bt while lowest PTU recorded in Rashi-779. Correlation between weather parameter and growth stages of cotton with seed cotton yield showed that the weather parameters like rainfall, temperature, relative humidity and BSS have significant effect on critical growth stages. Rainfall during square formation and flowering stages showed positive influence on the seed cotton yield of kharif cotton. Diurnal temperature range also showed negative correlation with seed cotton yield.
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