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Uptake of N, P and K by Irrigated and Unirrigated Pearl Millet (Pennisetum Typhoides)

Published online by Cambridge University Press:  03 October 2008

P. J. Gregory
P. J. Gregory
Affiliation:
University of Nottingham School of Agriculture, Sutton Bonington, Loughborough, Leics. LE125RD
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Summary

Uptake of nitrogen, phosphorus and potassium was measured for irrigated and unirrigated crops of pearl millet grown at Hyderabad, India. Irrigation slightly increased the concentration of nutrients in the crop and this, together with a higher dry weight, resulted in the nutrient content at harvest (day 82) being approximately twice that of the dry crop. Nutrient uptake by the latter ceased at about day 40 whereas the irrigated crop continued to take up nutrients for a further 7–21 days. However, both crops showed the importance of redistribution of nutrients from leaves and stems during the grain filling. The mean rate of nutrient uptake per metre of root per day (inflow) fell throughout growth in contrast with the rate of nutrient uptake per plant, which reached a maximum at about days 26 to 33. These findings are discussed in relation to possible strategies for fertilizer placement.

Type
Research Article
Information
Experimental Agriculture , Volume 15 , Issue 3 , July 1979 , pp. 217 - 223
Copyright
Copyright © Cambridge University Press 1979

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References

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