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Subject: Soil Science × Author: Abhishek Kumar × End date: 2018 × Start date: 2010 × Type: Thesis × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    Effect of P and Zn interaction on growth, yield, nutrient uptake and quality of maize (Zea mays L.) cv. HQPM-1 grown in mollisols
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2013-06) Abhishek Kumar; Singh, Veer
    A field experiment was conducted during kharif 2012 to find out the effect of P and Zn interaction on growth, yield, nutrient uptake and quality of maize (Zea mays L.) cv. HQPM-1 grown in mollisols at Crop Research Centre of G.B. Pant University of Agriculture and Technology, Pantnagar, Uttarakhand. The treatments replicated thrice in a factorial randomized block design (F-RBD) and the experiment consisted of 10 treatments. Growth and yield attributing characters of maize significantly affected by application of various P and Zn levels which in turn increased grain and stover yields of maize. The plant growth parameters viz., plant height and number of leaves was observed highest with the application of 60 kg P2O5/ha along with 15 kg Zn/ha. Days to 50 per cent tasseling and silking were found minimum with the combined application of 15 kg Zn/ha and 60 kg P2O5/ha but anthesis silking interval (ASI) was found minimum under 10 kg Zn/ha and 90 kg P2O5/ha combination which consequently improved grain yield. Interaction effect of 10 kg Zn/ha along with 60 kg P2O5/ha significantly increased cob and grain yield by 59.3 and 48.1 q/ha, respectively, over control (36.3 and 25.0 q/ha). Combined application of 10 kg Zn/ha and 60 kg P2O5/ha in general increased the availability of soil nitrogen, phosphorus, and zinc. Total phosphorus and zinc uptake was found highest under treatment T10 and T5 respectively. Protein, tryptophan and lysine content in maize grain significantly affected with the Zn and P levels and highest values of 20.7, 0.29 and 1.15 %, respectively, were observed with 60 kg P2O5/ha and 10 kg Zn/ha combination. All the yield attributes attained the positive but no-significant correlation with soil pH, EC and available Zn but soil available P showed significant and positively correlation with grain yield (0.680*). Tryptophan and lysine contents of grain were significantly correlated with available P (0.799**, 0.792**), grain P (0.787**, 0.790**) and grain Zn (0.755*, 0.789**), respectively. Among all the treatments, combined application of 10 kg Zn/ha and 60 kg P2O5/ha (T6) was found superior over other treatments for most of the growth, yield and quality parameters.