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Irrigation Effects on Roots and Shoots of Pearl Millet (Pennisetum typhoides)

Published online by Cambridge University Press:  03 October 2008

P. J. Gregory  and
G. R. Squire
P. J. Gregory
Affiliation:
University of Nottingham School of Agriculture, Sutton Bonington, Loughborough, Leics. LE12 5RD
G. R. Squire
Affiliation:
University of Nottingham School of Agriculture, Sutton Bonington, Loughborough, Leics. LE12 5RD
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Summary

Irrigated and unirrigated crops of pearl millet were grown in Hyderabad, India, during the post-monsoon season of 1977. Irrigation increased both the dry weight of roots and the number of root axes, but because the additional axes were thick and unbranched the total length of roots was unaffected. However, irrigation did cause more of the root length to be in the top 20 cm of soil. Yield of the irrigated crop was higher than that of the dry crop, mainly because more tillers survived to produce grain. Grain growth of the dry crop occurred when the net growth of the crop was zero, probably because of movement of assimilate from stems to panicles. Possible strategies for improving yields are examined in the light of the growth data.

Type
Research Article
Information
Experimental Agriculture , Volume 15 , Issue 2 , April 1979 , pp. 161 - 168
Copyright
Copyright © Cambridge University Press 1979

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References

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