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Subject: Plant Physiology × Author: Namaste Kumari × End date: 2022 × Start date: 2020 × Type: Thesis × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    Effect of tillage and nutrient management on growth, yield and physiology of wheat (Triticum aestivum L.)
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2022-01) Namaste Kumari; Bains, Gurdeep
    Wheat is a crop of nutritional and economic importance and hence the increase in wheat production has to match the increase in world population in order to guarantee global nutritional security over the coming years. Increased reliance on intensive agricultural practices have resulted in low Nutrient Use Efficiency (NUE), environmental pollution due to residual fertilizers and decreased productivity. Agronomic and physiological interventions such as mechanical manipulation of soil via different tillage systems and specificnutrient management practices are few of the approaches to increase the production in a sustainable manner. To analyze the effect of different tillage and nutrient management systems on growth, yield and physiology of wheat crops, the present field study was carried out at NEB, CRC, Pantnagar, during Rabi season of 2020-21 using wheat variety WH-1105. Six different tillage practices (ZT, CT, CC, PB, PR and RT) and three different nutrient management practices (GSBNM, SSNM and RDF) were the main plot and subplot treatments respectively. The lab experiments were carried out in the Department of Plant Physiology. Parameters such as plant height, number of tillers, LAI, shoot: root ratio, chlorophyll content, NR activity, root length, average root diameter, number of root tips, root volume, root surface area, root length density, root surface area density, root volume density, grain yield, straw yield, biological yield and harvest index were studied. A decrease of 21%, 20% and 20% in grain yield, straw yield and biological yield respectively was observed under PR as compared to CC. Grain yield, straw yield and biological yield under RT and CT were found at par with CC. A significant increase in crop growth and yield was observed under recommended dose of fertilizer application across all the tillage practices. The reduction in grain yield, straw yield and biological yield under SSNM and GSBNM was 7-13%, 11-23% and 10-18% respectively as compared to RDF. No other nutrient management practices were found at par with RDF for grain yield, straw yield and biological yield. Therefore, it can be concluded that RDF application under CC, CT and RT produced good yield and can be recommended after checking the reproducibility of results. However, GSBNM and SSNM can be adopted in order to increase the nutrient use efficiency of crops and hence further study is suggested.