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Author: Jha, Ayushi × End date: 2020 × Start date: 2020 × Thesis Type: M.Tech. ×
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    ThesisItemOpen Access
    Evaluation of Fertilizer Efficiency of Wheat Under Subsurface Drip Irrigation
    (Punjab Agricultural University, Ludhiana, 2020) Jha, Ayushi; Siag, Mukesh
    An experiment on nitrogen fertigation of wheat under sub-surface drip irrigation was conducted for two years, 2018-19 and 2019-20, at PAU, Ludhiana. Treatments were laid out in a split-plot design with three levels of sub-surface irrigation and fourth level as surface drip irrigation. The treatments also included four levels of N fertigation including no fertilizer application as control treatment. Impact of the treatments on yield and uptake of N, P and K were analyzed. There was no significant difference in grain yield between irrigation at 100% and 80% ETc and N fertilizer at 100% and 80% RDF. However, the grain yield was significantly lower under deficit irrigation and fertilizer level of 60% ETc and 60% RDF. Higher irrigation and fertilizer levels positively impacted the N concentration in both straw and grains. Even though fixed doses of P and K were applied, increase in N fertilizer level positively impacted P and K concentrations and uptake by 15-18%. Significantly lower levels of N concentration under surface drip irrigation treatment were recorded, but this did not have a significant effect on the yield as compared to that under sub-surface drip irrigation. Additional uptake of N was significantly higher with increase in N fertilizer application, but it did not have a significant impact on additional grain yield between N fertilizer levels of 100% and 80% RDF. For sub-surface drip irrigated wheat, irrigation at 80% ETc and N fertilizer at 80% RDF results in 20% irrigation water and N fertilizer saving. This treatment was considered the best treatment for adoption in Punjab conditions.