Integrated nutrient management in hybrid cotton.

摘要

Field experiments were conducted in India, during the 2005/06 and 2006/07 kharif seasons, to determine the suitable nutrient management strategies for American cotton hybrid under irrigation in vertisols. The treatments comprised absolute control, farmyard manure (FYM) at 10 t/ha, RD of NPK, RD of N alone, RD of N and P, RD of NPK+5 t/ha FYM, 50% RD of NPK+10 t/ha FYM, 50% RD of NPK+10 t/ha FYM+2% urea, RD of NPK+10 t/ha FYM and RD of NPK+sunn hemp at 15 kg/ha. Application of RD of NPK+10 t/ha FYM (T₉) recorded highest yield of 1775 and 1542 kg/ha, respectively, in both the years. Lowest kapas yield was recorded with absolute control. Application of RD of NPK+10 t/ha FYM resulted in gross returns of Rs. 35 000 and 30 840, respectively, during 2005/06 and 2006/07. Highest SPAD chlorophyll metre reading was recorded with the application of 50% RD of NPK+10 t/ha FYM+2% urea (T₈). Complete organic treatment, i.e. 10 t FYM/ha, recorded highest oil percentage (19.21%).