摘要
水田自然免耕后,土壤有机质含量比淹水平作土壤低,比水旱轮作土壤高,随着免耕时间延长,免耕土壤的有机质和活性有机质逐渐回升.免耕垄作土壤的腐殖质特别是松结合态腐殖质相对含量增多,土壤复合度增加,有利于土壤结构的改善。
Soil organic matter,available organic matter and humus contents are researched in thispaper.As compared with the tardi traditional tillage methods,soil organic matter contentin paddy fields after soil virginization is lower than that in inundated fields,but is higherthan that in drained fields.Organic matter and available organic matter contents of thevirginized soil increase gradually with the prolongation of soil virginization.Soil humuscontent,especially the loosely combined form of humus content and the degree oforgano-mineral gel complexation are increased in paddy fields under soil virginization,which are favorable to soil improvement.
出处
《西南农业大学学报（自然科学版）》
CSCD
1991年第4期434-437,共4页
Journal of Southwest Agricultural University
关键词
水田
自然免耕
有机质
腐殖质
土壤
paddy field
soil virginization
organic matter
humus.
