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Moisture use characteristics of sugarcane genotypes under different available soil moisture regimes in alluvial entisols

Published online by Cambridge University Press:  27 March 2009

R. L. Yadav  and
S. R. Prasad
R. L. Yadav
Affiliation:
Indian Institute of Sugarcane Research, Lucknow – 226002, India
S. R. Prasad
Affiliation:
Indian Institute of Sugarcane Research, Lucknow – 226002, India
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Summary

To study the response of three sugarcane genotypes (CO 1148, COJ 64 and CO 1158) to variations in moisture availability in sandy loam soil (entisol), field trials were conductedat Lucknow (26·5° N, 80·5° E, 120 m altitude) during 1984–5 and 1985–6. Three moisture regimes, i.e. wet (irrigation at 75% available soil moisture (ASM)), moist (irrigation at 50% ASM) and dry (irrigation at 25% ASM) were maintained during the pre-monsoon (before June) period in spring-planted (February-March) sugarcane. During the summer months (until June)the variety CO 1148 had a significantly greater sheath moisture percentage than COJ 64 and CO 1158. Under stress conditions, leaf area index was reduced most in COJ 64 and least in CO 1148.Underground shoots and roots grew faster in CO 1148, and the growth of above-ground parts was quicker in COJ 64. Compared with the 75% ASM regime the reduction in cane yield in the 25% regime was more in COJ 64 and CO 1158 (31 t/ha) than in CO 1148 (12 t/ha). The water requirement of COJ 64 was greater than that of the other varieties. Therefore, for higheryields COJ 64 needed frequent irrigation whereas CO 1148 performed well even under moderate irrigation (50% ASM).

Type
Research Article
Information
The Journal of Agricultural Science , Volume 110 , Issue 1 , February 1988 , pp. 5 - 11
Copyright
Copyright © Cambridge University Press 1988

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