Effects of broad-leaf crop frequency in various rotations on soil organic C and N, and inorganic N in a Dark Brown soil.
作者： Sukhdev S. Malhi , R. L. Lemke , S. A. Brandt
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摘要: The objective of this study was to determine the impact frequency broad-leaf crops canola and pea in various crop rotations on pH, total organic C (TOC), N (TON), light fraction (LFOC) (LFON) 0 - 7.5 15 cm soil depths autumn 2009 after 12 years (1998-2009) a Dark Brown Chernozem (Typic Boroll) loam at Scott, Saskatchewan, Canada. field ex-periment contained monoculture (herbicide tolerant blackleg resistant hybrid) compared with that these every 2-, 3-, 4-yr wheat. There no effect rotation duration phase pH. Mass TOC TON greater than 1-yr (monoculture) 2-yr rotations, while opposite true 3-yr rotations. (averaged across phases,) generally increased increasing duration, maximum difference LFOC LFON 1-yr, but rotation. consistent mass LFON. balance sheet over 1998 period indicated large amounts unaccounted for pea, suggesting great potential loss from soil-plant system treatment through nitrate leaching and/or denitrification. In conclusion, findings suggest quantity can be maximized by including hybrid
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