Plant residue and cropping system effects on N dynamics in a Gray Luvisolic soil
Autor: | K. Broersma, N. G. Juma, J. A. Robertson |
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Rok vydání: | 2000 |
Předmět: | |
Zdroj: | Canadian Journal of Soil Science. 80:277-282 |
ISSN: | 1918-1841 0008-4271 |
Popis: | Soil samples from differing cropping systems were amended with 15N-labeled plant residues having varying carbon to nitrogen (C:N) ratios to quantify N dynamics in a Gray Luvisolic soil. For non-amended cropping systems a significantly greater amount of total N was mineralized from the continuous legume (CL) than from the continuous grass (CG), barley/forage (BF) rotations, or continuous barley (CB) cropping systems. The addition of the fababean (Vicia faba L.) plant residue resulted in net N mineralization from most of the cropping systems. After 20 wk, 14.0%, 10.5% and 7.1% of the 15N was mineralized from fababean, barley (Hordeum vulgare L.) and fescue (Festuca rubra L.) amended residues, respectively, when averaged across cropping systems. Key words: Crop residues, cropping systems, Gray Luvisol, N mineralization, 15N, soil amendments |
Databáze: | OpenAIRE |
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