Use of Jhabua rock phosphate as a phosphatic fertilizer to cotton (cv. MCU 12)

摘要

A field experiment was carried out at Cotton Breeding Station, Coimbatore with cotton van MCU 12 as test crop with various combinations of Jhabua Rock Phosphate (JRP), Single Super Phosphate (SSP), compost and phosphobacteria (PB), to study the effect of JRP alone and with SSP, compost and PB on the yield and quality parameters of the crop. The results revealed that the yield parameters and ginning percentage were the highest in the treatment which received 50 per cent SSP + 50 per cent JRP along with compost and PB, which was significantly different from treatment with 100 per cent SSP alone. Other quality parameters viz. span length, micronaire value, bundle strength and uniformity ratio were not significantly correlated with the P availability.The study revealed that the indigenous source of phosphorus as JRP in combination with SSP, compost and PB, besides curtailing the input cost can effectively and profitably be used to improve yield and quality parameters of cotton crop. The kapas yield,lint yield and seed yield were significantly influenced by 50 per cent JRP + 50 per cent SSP with PB and compost. The highest available P content in soil was registered by 100 per cent SSP treatment followed by 50 per cent SSP plus 50 per cent JRP withPBand compost, whereas the later recorded the highest P uptake by crop on 160 DAS.