Ecology, Environment and Conservation Paper

Vol 24, Feb. Suppl. Issue 2018; Page No.(159-163)

EVALUATION OF GROWTH AND YIELD PARAMETERS OF COTTON HYBRIDS AS INFLUENCED BY DIFFERENT GROWING ENVIRONMENTS

Abhijeet Sharma, M.L. Khichar, Ram Niwas, Premdeep and Neha Pandey

Abstract

Field investigation was undertaken to evaluate the performance of cotton cultivars (Ankur 3028 BG II, BIO 6588 BG II and HHH 223) under different sowing environments and changing microclimate during the kharif season of 2013-14. Crop was sown in split plot design as main plot treatments with three date of sowing [4th week of April (D1), 2nd week of May (D2) and 4th week of May (D3)] and the sub-plots consisted of three varieties (Two Bt cotton hybrids-Ankur 3028BG II, BIO 6588 BG II and one non Bt cotton hybrid HHH 223. The fifty four treatment combinations were tested in split plot design with three replications. Among the Gossypium Ankur 3028 BG II produced tallest crop (174.1cm) as compared to other hybrids. The plant height under D2 crop was higher due to more radiation absoption and favourable weather during its life span. Goyal et al., (2006) also reported that plant height was greatly influenced by different thermal environments. The LAI significantly decreased with delay in sowing, irrespective of the varieties, at all growth intervals. Among the varieties of Gossypium, Ankur 3028 BG II showed highest values of dry matter per plant followed by HHH 223 and BIO 6588 BG II at all growth intervals. Crop growth parameters and yield attributes were recorded at time of harvest. Weather parameters during 50 per cent flowering were better associated with the crop parameters than those of other phenophases. Maximum temperature, minimum temperature and vapour pressure deficit showed a strong positive correlation with seed cotton, cotton seed, cotton lint and bolls per plant during boll opening stage, whereas morning and evening relative humidity showed negative correlation with seed cotton, cotton seed, cotton lint and bolls per plant during vegetative, flowering and boll opening stage.

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