Author(s): Apoorva Yadav; Ghanshyam Giri; Hitesh Upreti; Gopal Das Singhal
Linked Author(s): Gopal Das Singhal
Keywords: Nutrient and water management crop water requirements grain yield chlorophyll content
Abstract: Nutrient and water management are essential components of sustainable wheat cultivation which directly impacts crop yield and quality. Nitrogen is essential for plant growth, as it affects many physiological functions such as photosynthesis, root formation, and stress tolerance and varying rates of nitrogen application can affect chlorophyll content, crop health as well as crop productivity. Limited studies have focused on the effect of different nitrogen treatments on yield and chlorophyll content simultaneously. This study was conducted in the humid sub-tropical climate zone of Uttar Pradesh, India where crop experiments on wheat crops were performed. Three different plots were considered that correspond to different fertilizer treatments i. e., Treatment1 (T1), Treatment2 (T2) and Treatment3 (T3) with 150 kg/ha, 120 kg/ha (Nitrogen doses recommended in this region) and 90 kg/ha Nitrogen respectively. Each of these treatments had three replications and drip irrigation was provided as 100% of the crop water requirements (ETc) calculated using the FAO Penman-Monteith method. The chlorophyll content of the treatments was observed at different crop stages during the crop period using CCM-200 plus Chlorophyll Content Meter. Also, all the replications were harvested separately, and grain yields (GY) were recorded. The GY for T1, T2 and T3 were found to be 5068 kg/ha, 5036.3 kg/ha and 4639.4 kg/ha respectively. The GY of T1 and T2 were found comparable but for T3 there was a substantial decrease in GY. The peak for chlorophyll content was found at flowering stage for all the treatments and there was a substantial decrease after the flowering stage for T3 treatment. This is due to the decrease in nitrogen content, the photosynthetic capacity of crop also decreased and hence it is giving early senescence. The results highlight the effect of different nitrogen levels on chlorophyll content and yield.
Year: 2025