PJB-2022-27
CALIBRATION OF NITROGEN OPTIMUM LEVEL FOR PROMISING VARIETIES OF WHEAT GROWN IN DISTRICT MANSEHRA
Toqeer Hayat
Abstract
Abstract Nitrogen (N) is the most important element required for the crops growth and development. It is imperative to calibrate optimum N level and varieties for enhanced crop production. A field experiment was conducted to investigate the impact of various levels of N on wheat varieties Pirsabak-05, Wadan-17 and Shahkar-13 at Agriculture Research Station (ARS) Baffa, Mansehra, during 2020-2021. The experiment was laid out in randomized complete block design (RCBD) with two factors using seed rate at the rate of 120 kg ha-1. Different N levels (0, 105, 120, 135 and 150 kg ha-1) were applied in the form of urea in two splits, half with sowing and remaining half twenty days after plant germination. The basal dose of P and K at the rate of 90 and 60 kg ha-1 as single super phosphate and sulphate of potassium, respectively were applied at sowing time. Results showed that maximum plant height of 104.9 cm, spike no. m-2 (264.9), total dry matter yield (9485.5 kg ha-1), grain yield (3060.8 kg ha-1), thousand grains weight (50 g), straw yield (6437 kg ha-1) were recorded with 150 kg N ha-1 followed by wheat yield produced by the application of 135 kg N ha-1. Post harvest soil organic matter and N contents improved significantly (P ≤ 0.05) with increasing N levels. Wheat grain and straw N concentration of 1.82 % and 0.66 %, respectively were maximum in treatment of 150 kg N ha-1. Maximum plant N uptake of 98.74 kg ha-1 was recorded maximum with same N level in Wadan-17 variety. The wheat variety Wadan-17 was followed by Pirsabak-05 in production of yield and yield components. Results suggest that yield and plant N uptake by wheat improved significantly (P ≤ 0.05) by increasing N levels in all wheat varieties. Wadan-17 proved better than other varieties under the prevailing conditions of experiment.
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