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20211
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Subject: Agronomy × Author: Simran × Start date: 1980 × Type: Thesis × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    Influence of late-season nitrogen applications on yield and quality of happy seeder sown wheat (Triticum aestivum L.)
    (Punjab Agricultural University, Ludhiana, 2021) Simran; Jayesh Singh
    The experiment entitled “Influence of late-season nitrogen applications on yield and quality of happy seeder sown wheat (Triticum aestivum L.)” was conducted at Ludhiana and Kapurthala during 2019-20. The soil of Ludhiana was loamy sand and that of Kapurthala was sandy loam in texture, low in available nitrogen, organic carbon and medium in available phosphorus and potassium. The experiment which consisted of 15 treatments was conducted in RCBD with three replications. The treatments included a control (T15) and a check in the form of recommended dose of N (T1). All the other 13 treatments were supplied with equal dose of recommended N upto maximum tillering stage. Treatments T2 to T5 included additional soil based application of 15 or 30 kg N ha-1 (T2 and T3) at anthesis and their repeated application at grain milk stage (T4 and T5). Treatments T6 to T11 were based on foliar application of urea @ 3 or 6% at anthesis (T6 and T7) or at grain milk stage (T8 and T9) and their consecutive application at anthesis and grain milk stage (T10 and T11). T12 and T13 included additional foliar application of water at anthesis or at grain milk stage and in T14, water was sprayed at both anthesis and grain milk stage. The maximum plant height, dry matter accumulation, LAI at harvest at both the locations was observed in T11. T11 recorded the highest yield attributing characters and highest grain, straw and biological yield which is statistically at par with T10. The quality aspects including protein content, gluten content and hectolitre weight was maximum in T11 and was statistically at par with T10. So, spraying 6% urea both at anthesis and at grain milk has lead to good quality protein content along with higher yields of wheat. N content in flag leaf, middle leaf, spike, stem, grain and straw of wheat was found to increase significantly with two consecutive sprays of 3 and 6% urea at anthesis and grain milk stage over the treatments based only on soil application of N. Single spray of urea @ 6% concentration at anthesis stage proved beneficial in improving protein content and yield over its application at grain milk stage in happy seeder sown wheat. Foliar application of 6% urea at anthesis and grain milk stage increased the chlorophyll content and thus allowed the crop to remain green significantly for longer duration than its one time application at anthesis or grain milk stage and to those with late season soil application at anthesis or grain milk stage.