Response of desi cotton (Gossypium arboreum L. J genotypes to plant geometries and nutrient levels under irrigated conditions

摘要

A field experiment was conducted at PAU, Regional Research Station, Faridkot during kharif 2009 and 2010 to evaluate the performance of two arboreum varieties (FDK 124 and LD 694 as check) under two plant geometries (67.5 x 45 and 67.5 x 60 cm) and three nutrient levels (i.e. 56.25, 22.5 kg NP/ha; 75, 30 kg NP/ha and 93.75, 37.5 kg NP/ha). New variety FDK 124 yielded 24.5 per cent significantly higher seed cotton yield (2814 kg/ha) as compared to LD 694 (2260 kg/ha) due- to significantly more numberof bolls. Pooled data further indicated that significantly higher seed cotton yield was recorded under closer-geometry of 67.5 x 45 cm (2613 kg/ha) than wider plant geometry of 67.5 x 60 cm (2460 kg/ha). Though, yield attributing parameters such as bolls/plant were statistically improved in wider as compared to closer spacing but it could not compensate yield due to significantly higher plant population in the later case. Among nutrient levels, similar seed cotton yield was recorded with application of93.75, 37.5 kg NP/ha (2688 kg/ha) and 75, 30 Kg NP/ha (2587 kg/ha) but both were significantly better than that of 56.25, 22.5 kg NP/ha (2335 kg/ha). So, 75, 30 kg NP/ha and plant geometry of 67.5 x 45 cm seemed to be ideal for new variety FDK 124 for realizing higher productivity under the specific agro climatic conditions of Faridkot.