Plant residue and cropping system effects on N dynamics in a Gray Luvisolic soil

Autor:	K. Broersma, N. G. Juma, J. A. Robertson
Rok vydání:	2000
Předmět:	Soil conditioner Crop residue Agronomy Soil test biology Chemistry Soil Science Hordeum vulgare Mineralization (soil science) Cropping system Festuca rubra biology.organism_classification Legume
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
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::611d9cf05328c0e019f332659c431f07 https://doi.org/10.4141/s99-070 Zobrazit plný text záznamu