摘要
研究了连续2年春小麦-豌豆轮作后6种不同处理土壤微生物的数量与组成,结果表明:与传统翻耕比较,免耕可使土壤微生物数量增加,春小麦-豌豆轮作序列增加了14.9%,豌豆-春小麦序列增加了38.4%,但对土壤微生物组成没有明显改变;覆盖可使土壤微生物数量增加,春小麦-豌豆序列覆膜增加较多,增加了30.9%。豌豆-春小麦序列秸秆覆盖增加为甚,增加了124%。土壤微生物数量随着土层的加深而逐渐减少。
The field experiment was conducted at the station of arid land farming of Gansu Agricultural University. The two rotation series (the rotation of spring wheat-field pea and the rotation of field pea-spring wheat) were studied for 2 years. The results were as follows: the soil microbial quantity was higher in the no-till and mulch treatments compared with conventional tillage. Under no-till treatment the soil microbial quantity increased by 14.9 % with the rotation of spring wheat-field pea, and by 38.4 % with the rotation of field pea-wheat. Under the mulch treatment the soil microbial quantity increased by 30.9 % with the rotation of spring wheat-field pea, and by 124 % with the rotation of field pea-wheat. The soil microbial quantity showed negatively relationship to the depth of the soil.
出处
《甘肃农业大学学报》
CAS
CSCD
2004年第6期634-638,共5页
Journal of Gansu Agricultural University
基金
ACIAR资助项目
关键词
免耕
地膜覆盖
秸秆覆盖
土壤微生物
no-tillage,plastic mulching
straw mulching
soil microorganism
