PJB-2018-49
Compensation of wheat yield through increased seeding densities in delay sown condition
Wajid ali
Abstract
An experiment was conducted to evaluate the performance of a wheat variety Faisalabad-2008 to recommend a proper seed rate for different sowing dates under agro-ecological conditions of Haripur during 2015-16. Wheat was sown on four sowing dates (D1) 20th November, (D2) 5th December, (D3) 20th December, (D4) 5th January using three seed rates: (S1) 100, (S2) 130, and (S3) 160 kg ha-1, respectively. The experiment was laid out in randomized complete block design with split plot arrangement, keeping seed rates in main plots and sowing dates in sub plots replicated thrice. Days to 50% heading, plant height, spike length, biological yield and yield components were significantly affected by various sowing dates. The maximum days to 50% heading were taken when sown on 20th December while the maximum plant height, grain spike-1, 1000 grain weight and productive tillers were obtained when the crop was sown on 20th November. It was also noted that delay in sowing reduced biological yield and yield components significantly while increased seeding rates resulted in reduced number of grains but higher grain yield. Maximum productive tillers were obtained in wheat seeded with highest seed rate of 160 kg ha-1. The highest grain and biological yield was obtained in November 20th, and December 5th sowing using the highest seed rate of 160 kg ha-1. It was inferred that further delay in wheat sowing from 5th December resulted in reduced grain yield. Thus it was concluded that wheat crop sown on 20th November using seed rate of 160 kg ha-1 performed better under the agro-ecological conditions of Haripur. The grower of the area may delay wheat sowing till 5th December but they will be required to use increased seed rate by 60%. Keywords: Seed rates, Sowing dates,
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