Short-term nitrogen dynamics in soil amended with fresh and composted cattle manures
The amount of available nitrogen in fresh and composted manures is required to adjust inorganic fertilizer applications for crops when using manures and composts. Corn (Zea mays L.) plants were grown for 8 wk at temperatures of 17–27 °C and 12–18 °C in soil amended with two rates of fresh and compos...
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Veröffentlicht in: | Canadian journal of soil science 1994-05, Vol.74 (2), p.147-155 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | The amount of available nitrogen in fresh and composted manures is required to adjust inorganic fertilizer applications for crops when using manures and composts. Corn (Zea mays L.) plants were grown for 8 wk at temperatures of 17–27 °C and 12–18 °C in soil amended with two rates of fresh and composted solid beef cattle manure. Apparent N uptake of corn grown in soil amended with fresh solid beef cattle manure, composted beef cattle manure and (NH
4
)
2
SO
4
at the higher temperature was 2, 8, and 36%, respectively, during this 8-wk period. Nitrogen uptake by corn in fresh solid beef cattle manure-amended soil at low temperature was affected by factors other than N availability. A 12-wk laboratory experiment was performed in which
15
NH
4
+
was added to fresh and composted manure-amended soil to determine the fate of the inorganic N in the manure and to measure N mineralization rates. Net immobilization of inorganic N occurred with all manures; however, after 3 wk, net mineralization occurred with the solid and composted beef cattle manure. Immobilization of
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N continued with all manure amendments as a result of mineralization-immobilization turnover. The amount of unrecovered
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N after 12 wk was 10.5, 2 and 1% of the added
15
N in soil amended with solid beef cattle manure, composted beef cattle manure and manure composted with bark, respectively. Key words: Composted manure, nitrogen availability,
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N, immobilization, remineralization, temperature |
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ISSN: | 0008-4271 1918-1841 |
DOI: | 10.4141/cjss94-022 |