Effect of Different Varieties and Phosphorus Levels on Growth and Yield of Wheat under Late Sown Condition

Abstract:

A field experiment was carried out at Dhubhara Nirwahan Village of district Basiti near Vikram Jot town of Basti district, on Ayodhya- Basti road, Basti (U.P.) during Rabi season of 2020-21 to study the response of late sown wheat varieties to different phosphorus levels. Sixteen treatment combinations and consisted of four levels of phosphorus (0 kg P₂O₅ ha^-1, 30 kg P₂O₅ ha^-1, 60 kg P₂O₅ ha^-1 , 90 kg P₂O₅ ha^-1) and four varieties of wheat (HUW-234, NW-2036, HD-2643 and DBW-14).The experiment was conducted in Split Plot Design (S.P.D.) with three replications on silt loam having organic carbon (3.8%), nitrogen (203 kg ha^-1), phosphorus (12.25 kg ha^-1) and potassium (265 kg ha^-1). The growth characters like plant height (cm), dry matter accumulation (g) meter^-2, number of shoots (m^-2), leaf area index were significantly higher under 90 kg P₂O₅ ha^-1  but which was at par with 60 kg P₂O₅ ha^-1 over rest of the levels and among the varieties DBW-14 was at par with NW-2036 while significantly superior over HUW-234 and HD-2643. The yield components like number of spikes per square meter, spike length (cm), number of grains spike^-1, grain yield (q ha^-1), straw yield (q ha^-1) and phosphorus uptake at harvest (kg ha^-1) were maximum under 90 kg P₂O₅ ha^-1 and among the varieties DBW-14 being at par with NW-2036. Harvest index and 1000-grain weight (g) were not influenced significantly due to phosphorus levels and varieties.