Productivity parameters of Bt cotton ( Gossypium hirsutum) hybrids as influenced by mungbean intercropping under semi arid conditions.

摘要

Field experiments were conducted at PAU, Regional Research Station, Faridkot during Kharif 2010 and 2011 to evaluate the impact of intercropped mungbean on two Bt cotton hybrids i.e MRC 7017 (M) and Bioseed 6488 (B) comprising of six treatments was laid out in randomized block design with three replications. Better Leaf Area Index (LAI) and higher Photosynthetic Active Radiation Interception (PARI) resulted in higher productivity for MRC 7017, while boll weight (4.9 g) was statistically better for MRC7017, significantly higher boll count (60.1) was recorded for Bioseed 6488. MRC 7017 produced 19 per cent higher seed cotton yield (3238 kg/ha) under paired row, than respective treatment of Bioseed 6488 (2720 kg/ha). MRC 7017 exhibited highest FUE (6.92) as well as WP (667.2 g/m 3) under paired row. Studies revealed feasibility of mungbean as an intercrop in cotton with a production potential of ~5 q/ha besides other legume related benefits like soil enrichment in terms of atmospheric N fixation and addition of organic matter. Improved SCY of both the Bt cotton hybrids under paired row and intercropped treatments over that of sole crop has been found promising, though further investigations are required to verify the results over the years.