SUSTAINABILITY OF BASMATI-WHEAT SEQUENCE UNDER INTENSIVE MANAGEMENT OF NUTRIENTS AND ITS EFFECT ON YIELD AND UPTAKE OF ZN, CU, FE AND MNJ.K. Dhaliwal, G.S. Saroa and S.S. Dhaliwal
The present research was carried on with an objective to investigate the effect of different nutrient management practices on yield, content and uptake of micronutrients by wheat crop in basmati-wheat sequence. To achieve these objectives, grain and straw samples of wheat were taken from an ongoing long term fertilizer experiment (which is in progress since Rabi 2006-07), at Research Farm, Punjab Agricultural University, Ludhiana. Straw and grain samples were collected during harvesting of wheat crop in 2014. For this study ten treatments were applied to wheat crop included unfertilized, recommended fertilizer (RF), integrated nutrient management [75 percent RF + 200 kg N ha-1 from FYM (INM1) and RF + 200 kg N ha-1 from FYM (INM2)] and N applied at 300 and 400 kg N ha-1 through farmyard manure, vermicompost and rice straw compost. The results indicated that grain as well as straw yield was maximum in integrated nutrient management plots while minimum in control plots. Uptake as well as content of Zn and uptake of Mn was more in recommended fertilizer plots as compare to control, integrated nutrient and organic treatments. However, uptake and content of Fe and Cu as well as content of Mn was maximum in integrated nutrient management plots. The results of the study revealed that for sustainability of agricultural systems, addition of organics either alone or in combination with chemical fertilizers is pre-requisite to enhance the yield, concentration and uptake of micronutrients by wheat.
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