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Response of Irrigation Frequencies and Nitrogen Doses on Yield and Yield Attributes of Late Sown Wheat

Department of Agronomy, CCS Haryana Agricultural University, Hisar-125 004 (Haryana), India
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(Received : January 15, 2017; Accepted : March 17, 2017)


A two-year field experiment was conducted at CCS Haryana Agricultural University, Hisar during 2010-11 and 2011-12 to study the effect of irrigation frequencies and nitrogen doses on yield and yield attributes of late sown wheat. The experiment consisting of three irrigation frequencies viz., One irrigation at CRI, two irrigations at CRI and heading and four irrigations at CRI, late tillering, heading and milking in main plots and five nitrogen doses viz., Control i. e. 0 kg N/ha, 50 kg N/ha, 100 kg N/ha, recommended dose of nitrogen i. e. 150 kg N/ha and 200 kg N/ha in sub-plots was laid out in strip plot design with four replications. The results showed that grain and straw yield of wheat increased consistently and significantly with increasing irrigation frequencies. The grain yield increased by 50.6 and 47.5% over one irrigation and 20.4 and 21.9% over two irrigations and four irrigations (3832 and 3989 kg/ha) during 2010-11 and 2011-12, respectively. Similarly, the straw yield and harvest index of wheat increased significantly with increase in irrigation frequencies. Yield attributes viz., number of effective tillers/m2, number of grains/earhead, test weight, earhead length and number of spikelets/earhead increased significantly with increasing irrigation frequencies.Increase in N dose increased the grain yield significantly up to 150 kg N/ha. Highest number of effective tillers/m2 (315 and 323), number of grains/earhead (42.3 and 42.7), test weight (41.4 and 41.3), earhead length (10.8 and 11.1) and number of spikelets/earhead (18.9 and 19.0) were observed with N @ 200 kg N/ha followed by recommended dose i. e. 150 kg N/ha, 100 kg N/ha, 50 kg N/ha and minimum were observed in control. However, the grain and straw yield of wheat was statistically at par with highest dose of 200 kg N/ha with recommended dose of nitrogen i. e. 150 kg N/ha during both the years.
Key words :Irrigation frequencies, nitrogen doses, yield attributes, yield, late sown wheat