Author(s):

Versha Gupta, Arvind Verma, Jai Prakash Bhimwal and Bharat D Malunjkar

Abstract: A field experiment was conducted during kharif and rabi seasons of 2015-16 and 2016-17 at Udaipur to evaluate the effect of weed and nutrient management on quality protein maize and their residual effect on succeeding wheat. The experiment consisted of nine weed management treatments viz., weedy check, hand weeding at 15 DAS and 35 DAS, tembotrione 0.125 kg ha^-1 at 20 DAS, alachlor 2.0 kg ha^-1 as PE fb hand weeding at 35 DAS, atrazine 0.5 kg ha^-1 as PEfb hand weeding at 35 DAS, tembotrione 0.125 kg ha^-1 at 20 DAS fb hand weeding at 35 DAS, alachlor 2.0 kg ha^-1 + atrazine 0.5 kg ha^-1 as PE fb hand weeding at 35 DAS, alachlor 2.0 kg ha^-1 as PE fb tembotrione 0.125 kg ha^-1 at 20 DAS and atrazine 0.5 kg ha^-1 as PE fb tembotrione 0.125 kg ha^-1 at 20 DAS with three nutrient management treatments viz., NPK, NPK+Zn and NPKS+Zn, thereby making 27 treatment combinations. The experiment was laid out in split plot design, assigning weed management to main plots and nutrient management to sub plots. The treatments were replicated thrice. Maize cv. Pratap QPM-1 and wheat cv. Raj.4079 used as test crops. Maximum reduction of weed density and dry matter as well as highest weed control efficiency (72.07%) was recorded in crop subjected to atrazine fbtembotrione closely followed by alachlor fb tembotrione and two hand weeding at 15 and 35 DAS. Atrazine fbtembotrione produced significantly higher grain (4516 kg ha^-1) and stover (7459 kg ha^-1) yield compared to other treatments. Nutrient management had no significant effect on weed density during both the years while weed dry matter was significantly affected by different nutrients. Nutrient application of NPKS+Znrecorded significantly higher grain (4275 kg ha^-1) and stover (7227 kg ha^-1) yield. Under residual response on succeeding wheat, no significant effect of weed and nutrient management treatments applied in QPM was observed on weed density and dry matter as well as grain and straw yield of wheat during both the years of experimentation.

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