Energy balance studies in cotton {Gossypium hirsutum L.) -chickpea (Cicer arientinum L.) cropping system as influenced by different integrated nutrient management systems

摘要

An experiment was conducted during 2006-07 and 2007-08 at the research farm of Department of Agronomy, MPKV, Rahuri, Dist. Ahmednagar (MS) to find the effect of different organic and inorganic sources of nutrient apphcation alone or in combination with each other on energy balance studies in hybrid cotton-chickpea cropping sequence. The experiment was laid-out in a split plot design with three replications. The seven main-plot treatments viz. T_1: Gross recommended dose of fertilizer (GRDF) i.e. 10 tfarmyard manure (FYM) ha~(-1) + recommended dose of fertilizer (RDF) as 100:50:50 kg NPK ha ', T_2 : 75 % RDF + 25% recommended dose of nitrogen (RDN) through vermicompost, T_3: 50% RDF + 50% RDN through vermicompost, T_4^ : 25% RDF + 75% RDN through vermicompost, T_5: 100% RDN through vermicompost, T_6: Fertilizer dose according to soil test crop response (STCR) equation and T_7 : Control, were applied to hybrid cotton cv. 'Phule-492' during summer season and the sub-plot treatments comprising of : Control, : 50 % RDF, S3: 75% RDF and S_4: 100% RDF were apphed to chickpea cv. 'Digvijay' during rabi season. The results indicated that, application of fertilizer dose according to soil test crop response (STCR) equation recorded significandy higher values for different growth attribu es viz. plant height, monopodial branches, sympodial branches and dry matter plant ' , seed cotton yield, stalk yield, monetary returns and nutrient uptake during both the years of experimentation. The lowest values for growth attributes, seed cotton yield, stalk yield, monetary returns and nutrient uptake were recorded by the control.