Vol. 15 No. 1
Effect of crop combination and nutrient management on yield, nutrient uptake and economics of sweet corn based cropping system
Abstract: A field experiment was conducted in rainfed upland at Bhubaneswar, Odisha during 2017-18 to study the effect of crop combinations and nutrient management practices on sweet corn (Zea mays var. saccharata) based cropping systems. The experiment was laid out in a split- plot design with three replications. Four cropping systems namely, C1 [rice (Oryza sativa L.)- horsegram (Macrotyloma uniflorum (L.) Verdc.) ], C2 [sweet corn- horsegram], C3 [sweet corn + black gram (Vigna mungo L.) in 2:2-horsegram] and C4 [sweet corn + cowpea (Vigna unguiculata L.) in 2:2-horsegram] were allotted to the main-plots and three nutrient management practices i.e., N 1 (RDF), N 2 (soil test based 75% RDN + 25% N from FYM + lime 0.2 LR + biofertilizers consortium) and N 3 (FYM, vermicompost and neem oil cake to supply 1/3 rd RDN each + biofertilizers consortium) to the sub-plots. Cropping systems did not affect the growth parameters, yield, yield attributes and quality parameters of sweet corn, though the sole crop registered numerically higher values of green cob yield (7.41 t ha -1). Integrated administration of nutrients resulted in higher growth attributes, yield, yield parameters and quality aspects of sweet corn when compared to chemical and organic nutrient package. Nutrient uptake was maximum in sweet corn + cowpea-horsegram system (123.9 kg N, 92.5 kg P and 161.8 kg K ha-1) and INM practice (130.8 kg N, 55.0 kg P and 158.0 kg K ha-1). Sweet corn + cowpea (2:2)- horsegram system under INM practice produced the highest system yield of 12.20 t SEY ha -1 with BCR of 2.18.
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