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OALib Journal期刊
ISSN: 2333-9721
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杨麦间作系统土壤氨挥发特点分析
DOI: 10.3969/j.issn.1000-2006.2013.01.023, PP. 127-131
Keywords: 间作系统,施氮水平,氨挥发速率,氨挥发累积量
Abstract:
利用通气法田间原位实验,研究了不同施氮水平下不同株行距杨麦间作系统、单作麦田系统的土壤氨挥发特点。结果表明:间作系统与单作系统土壤氨挥发变化趋势无明显差异,不论是基肥期还是追肥期各处理土壤氨挥发主要发生在施肥后6～7d,占总累积挥发量的60%～83%;间作系统不同施氮水平土壤氨挥发速率及挥发累积量均不同程度低于单作系统相应施氮水平下的挥发速率及挥发累积量;在整个冬小麦生长季内,株行距2m×5m的杨麦间作系统(i1)和2m×15m的杨麦间作系统(i2)在不同施氮水平下土壤氨挥发累积量分别比单作系统降低了0.76～4.23kg/hm2和2.13～4.16kg/hm2。
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