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。 Taking Quzhou County as an example, the changes of soil fertility after the reclamation of cultivated land were excavated through field investigation, sampling and laboratory analysis. The results showed that the soil fertility, including soil organic matter, total nitrogen, available phosphorus and available potassium, had no significant difference compared with the control cultivated land, and the soil bulk density decreased. It is suggested that reclamation work must be tailored to local conditions. In the plains, as long as digging and harming cultivated land does not affect tillage under no more than a certain depth, cultivation can be directly resumed. No special reclamation works are required to reclaim and fertilize cultivated land.