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Response of late-sown mustard (Brassica juncea) to irrigation and nitrogen

Published online by Cambridge University Press:  27 March 2009

S. K. Yadav ,
Krishan Chander  and
D. P. Singh
S. K. Yadav
Affiliation:
Department of Agronomy, CCS Haryana Agricultural University, Hisar – 125 004, India
Krishan Chander
Affiliation:
Department of Agronomy, CCS Haryana Agricultural University, Hisar – 125 004, India
D. P. Singh
Affiliation:
Department of Agronomy, CCS Haryana Agricultural University, Hisar – 125 004, India
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Summary

The response of late-sown mustard (Brassica juncea L.) to four rates of irrigation (ratio of irrigation depth to cumulative pan evaporation, ID:CPE = 0·2, 0·4, 0·6 and 0·8) and nitrogen (0, 30, 60 and 90 kg/ha) was investigated at Haryana Agricultural University, India, in the winter seasons of 1986/87 and 1987/88. Increases in the amounts of water and N fertilizer applied increased leaf water potential, stomatal conductance, light absorption, leaf area index, seed yield and evapotranspiration and decreased canopy temperature. Water-use efficiency was highest for the 0·4 ID:CPE irrigation treatment in both seasons, and for the 60 kg N/ha N treatment in 1986/87 and the 90 kg N/ha treatment in 1987/88. The combination of 0·6 ID:CPE with 60 kg N/ha gave a significantly higher seed yield than lower rates and equalled that from the highest irrigation and N treatment combinations. The amount of water used by the mustard crop decreased with increasing soil depth irrespective of treatment. In the deeper soil layers, the percentage of total moisture use was greater under less irrigated than under more frequently irrigated plots. Leaf area index showed a significant positive linear relationship with evapotranspiration and light absorption and a negative linear relationship with canopy temperature. Seed yield was linearly related to leaf area index and light absorption coefficient.

Type
Crops and Soils
Information
The Journal of Agricultural Science , Volume 123 , Issue 2 , October 1994 , pp. 219 - 224
Copyright
Copyright © Cambridge University Press 1994

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