אסיף מאגר המחקר החקלאי

Nitrogen mineralization in the field at various soil depths

Year:

1989

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Volume :

40

Co-Authors:

HADAS, A., Institute of Soils and Water, Volcani Center, Aro, Bet Dagan, 50250, Israel
FEIGIN, A., Institute of Soils and Water, Volcani Center, Aro, Bet Dagan, 50250, Israel
FEIGENBAUM, S., Institute of Soils and Water, Volcani Center, Aro, Bet Dagan, 50250, Israel
PORTNOY, R., Institute of Soils and Water, Volcani Center, Aro, Bet Dagan, 50250, Israel

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Abstract:

The accumulation of mineral nitrogen was measured in the field in five soil‐layers between 0 and 120 cm, in two plots of a long‐term experiment contrasting high and low fertilizer inputs. Soil temperature and moisture were also determined. The total quantity of mineral N that accumulated in the 0‐120 cm soil layer during 11 weeks in the summer was 138 and 78 kg ha−1, 25% and 45% of which were found below 60cm, in the high and the low fertility plots, respectively. Nitrogen mineralization in the field was predicted by a model which takes account of changes in temperature and moisture content of the soil. The potentially mineralizable N for this model was found from laboratory incubation experiments. The measured amount of mineralized N was 13 to 26% less than the predicted amount. Copyright © 1989, Wiley Blackwell. All rights reserved

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