Yield and nutrient uptake in cotton - Wheat sequence with integrated nutrient management

Charjan, Y.D.

Advances in Plant Sciences 18(2): 845-851

2005


ISSN/ISBN: 0970-3586
Accession: 012754015

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Abstract
A field experiment was conducted on integrated nutrient management system for cotton (Gossypium hirsutum)- wheat (Triticum aestivum) sequence on vertisol at MPKV, Rahuri, for two consecutive years during 1999-2000 and 2000-2001. In was laid out in slipt plot design with three replications. Fertilizer levels viz. 75 and 100 per cent RDF (100 : 50: 50 N, P2O5 and K2O kg ha(-1)) along with four levels of manure viz. Control, green manure + Azotobacter + phosphate solubilizing bacteria, 5 and 10 t FYM ha(-1) to cotton were tried in main plot. Three fertilizer levels viz. 50, 75 and 100 per cent RDF (120: 60: 60 N, P2O5 and K2O kg ha(-1)) to wheat were treid in sub-plots and in each level 25 per cent N was substituted through farmyard manure (FYM). Application of 100 per cent RDF recorded significantly higher seed cotton yield (20.68 q ha(-1)) and stalk yield (47.76 q ha(-1)) over 75 per cent RDF. Similarly, wheat grain yield (45.68 q ha(-1)), straw yield (58.11 q ha(-1)), NPK concentration in the plants and available NPK in the soil were highest with 100 per cent RDF to cotton. Application of 10 t FYM ha(-1) to cotton recorded the highest seed cotton and stalk yield, wheat grain and straw yield; however, it was at par with treatment green manure + Azotobacter + phosphate solubilizing bacteria. Also NPK concentration in the plant and availalbe NPK in the soil were highest with 10t FYM ha-1 and it was at par with treatment manure + Azotobacter + phosphate solubilizing bacteria except for P in 1999 and N during 2000. Application of 75 per cent RDF to wheat recorded grain, straw yield, NPK concentration in the plant and available NPK in the soil at par with 100 per cent RDF. Thus, the optimum dose for cotton-wheat rotation was 100 per cent RDF and green manure + Azotobacter + phosphate solubilizing bacteria to cotton and 75 per cent RDF to wheat in which 25 per cent N was substituted through farmyard manure.