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Water Use by Maize at Three Plant Densities

Published online by Cambridge University Press:  03 October 2008

Lloyd A. Downey
Lloyd A. Downey
Affiliation:
C.S.I.R.O. Division of Irrigation Research, Griffith, N.S.W. 2680, Australia
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Summary

Water use by maize at three densities was measured by a complete water balance, including soil moisture, rain, applied irrigation and deep drainage in crops irrigated so that relative turgidity at noon remained above 90 per cent (i.e. no-stress conditions). Total evapotranspiration between planting and harvest, 56 cm., was not significantly affected by density, but evapotranspiration was slightly higher at higher densities when ground cover was less than 50 per cent. Actual evapotranspiration rose to 1 cm. per day during anthesis and grain filling. A fifth of the water applied moved beyond the root zone, indicating that work on more permeable soils would be inaccurate if the deep drainage component was ignored.

Type
Research Article
Information
Experimental Agriculture , Volume 7 , Issue 2 , April 1971 , pp. 161 - 169
Copyright
Copyright © Cambridge University Press 1971

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