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Recovery of 15N-labelled fertilizer applied in autumn to winter wheat at four sites in eastern England

Published online by Cambridge University Press:  27 March 2009

D. S. Powlson ,
P. B. S. Hart ,
G. Pruden  and
D. S. Jenkinson
D. S. Powlson
Affiliation:
Rothamsted Experimental Station, Harpenden, Herts., ALB 2JQ
P. B. S. Hart
Affiliation:
Rothamsted Experimental Station, Harpenden, Herts., ALB 2JQ
G. Pruden
Affiliation:
Rothamsted Experimental Station, Harpenden, Herts., ALB 2JQ
D. S. Jenkinson
Affiliation:
Rothamsted Experimental Station, Harpenden, Herts., ALB 2JQ
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Summary

The recovery of autumn-applied labelled fertilizer N in winter wheat and in the soil and roots was measured in five experiments on three soil types in eastern England. In four of the experiments, crop recoveries of fertilizer N ranged from 11 to 34 % in years when drainage during winter and early spring was close to, or less than, the long-term average of about 200 mm. Crop recovery was higher (42 %) at a site where the soil was heavier and winter drainage was less. Total recoveries (in crop and soil, 0–50 cm) ranged from 22 to 61 %. Fertilizer N was at least risk to leaching when there was a large soil moisture deficit at the time of application. There was a linear relationship between fertilizer N lost and drainage (but not rainfall) between the time of N application and the end of March of the following year. Autumn-applied fertilizer N increased grain yield slightly in two of the experiments and decreased it in a third.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 107 , Issue 3 , December 1986 , pp. 611 - 620
Copyright
Copyright © Cambridge University Press 1986

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