挖损农田复垦前后地力变化研究——以华北平原的曲周县为例

The Fertility Changes of the Cultivated Land Damaged by Digging before and after Its Reclamation——A Case Study in Qu Zhou County,North China Plain

以曲周县为例,通过野外调查、采样和实验室分析,对挖损耕地复垦后的土壤肥力变化进行了研究。研究结果表明,挖损耕地与对照耕地相比较,土壤肥力包括土壤有机质、全氮、有效磷、速效钾含量没有显著差异,土壤容重变小。建议复垦工作必须因地制宜,在平原地区只要挖损耕地在不超过一定深度影响耕作的情况下,可以直接恢复耕种,不需要进行专门的复垦工程进行挖损耕地的复垦和培肥。

The fertility change of the cultivated land which was damaged due to digging before and after its reclamation was compared.The results showed that the bulk density decreased,while the soil fertility including soil organic matter,total-N,available-P,available-K had no differences.Thus,the direct re-cultivation/reclamation method could make the soil fertility of damaged cultivated lands no obvious difference comparing the original cultivated lands in certain input and management in North China Plain.