摘要
在垄作免耕水稻土中,游离铁有所增加,但无定形铁却有下降趋势;腐殖质增多,有机无机复合度提高,从而使水稻土团聚性增强,>0.001mm 水稳性微团聚体和<0.001mm 粘粒团聚度都有不同程度的增加。其中,无机微团聚体数量增多,有机微团聚体相对减少,但 Al、Fe—有机微团聚体却表现出明显的增加。
In paddy soil,the content of the free iron oxide tended to increase,while the degree of activation of iron oxide tended to decrease,and the degrease of organo-mineral complexation significantly increased in comprision with that in waterlogging paddy soil.Thus,the aggregation of the paddy soil increased and the content of>0.001mm waterstabble microaggregates,the degree of aggregation of<0.001mm claybecame larger more or less,in which mineral microaggregates increa-sed,and organo microaggregate decreased,but Al·Fe-organo microaggregatessignificantly increased.
出处
《西南农业大学学报（自然科学版）》
CSCD
1989年第1期17-21,共5页
Journal of Southwest Agricultural University
关键词
水稻
免耕
土壤
团聚体
垄作
paddy soil
non-till
ridge tillage
coacervatus
aggregation.
