摘要
本试验重点研究了长期定位施用化学氮肥、耕作措施、秸秆还田以及施用化学除草剂对土壤质量的影响。结果表明,施用化学氮肥主要影响土壤速效氮含量;粉碎以后结合耕作秸秆还田或者粉碎以后覆盖还田对土壤质量改善明显,整秸秆覆盖还田以及免耕条件下还田效果不明显;常规的深浅轮耕耕作可以增加土壤速效氮的含量,但是也促进了土壤有机质的矿化分解,使土壤有机质含量降低。浅耕、少耕和免耕土壤无机氮含量相对于深浅的耕明显降低,但土壤有机质含量与深浅轮耕相山则明显提高。施用除草剂使土壤有机质含量和土壤pH降低,但是增加了土壤速效养分含量。
The effects of chemical nitrogen fertilization, tillage, residues management and herbicide application on soil quality were evaluated through long term research. The indicators included soil available N, available P, available K, soil organic matter, pH, total N, and silt clay content. The results showed that chemical nitrogen mainly influenced the available N. Chopped residues improved soil quality significantly when returned to soil and accompanied with tillage. The whole stems used for mulching had no significant effects on soil quality. Traditional tillage increased available N content, but it also increased the organic matter decomposing rate so the organic matter decreased. Herbicide application decreased soil organic matter content and pH value,but increased the available N, P,K.
出处
《河北农业科学》
2000年第3期16-22,共7页
Journal of Hebei Agricultural Sciences
关键词
化学氮肥
耕作
秸秆还田
除草剂
土壤质量
Fertilization
Tillage
Residues management
Herbicide application
Soil quality
