摘要
黑土是我国重要的土地资源,近年来黑土肥力日益退化,而黑土肥力的退化必然影响土壤氮循环。文章根据黑土区生态系统氮素输入、转化与输出及其影响因素,分析氮循环模式通过降水、人工施用含氮化肥、作物根及秸杆还田输入黑土生态系统氮素,土壤中氨化作用、硝化作用对黑土生态系统氮素转化,以及反硝化作用、淋失、作物产出等氮素输出阐述黑土区生态系统氮循环特点。
Black soil is one of the most important soil resources in China. The fertilities of black soil have been increasingly degradated in recent years, which could affect the soil nitrogen recycling. Based on the status of the ecosystem in black soil, nitrogen recycling pattern was analyzed with the primary analysis on the input, output, transformation and their influencing factors, and characteristics of ecosystem nitrogen recycling in black soil were expatiated on the precipitation, manually employed nitrogen fertilizer, crop roots and ammonification, nitrification restituted nitrogen from the carbon and nitrogen of field straw, as well as the nitrogen denitrification, leaching loss, and crop output.
出处
《东北农业大学学报》
CAS
CSCD
北大核心
2009年第2期140-144,共5页
Journal of Northeast Agricultural University
基金
国家"863"项目(2006AA10Z424)
关键词
黑土生态系统
氮循环
氮淋失
black soil ecosystem
nitrogen recycling
nitrogen leaching loss
