作　　者： ; ; ; ;

机构地区： 中国农业大学资源与环境学院

出　　处： 《资源科学》 2010年第4期737-742,共6页

摘　　要： 本文以华北平原的曲周县为例,通过实地调查和对比分析的方法,对挖损耕地复垦前后生产能力变化进行研究。研究结果表明,挖损地块与对照地块相比,二者生产能力没有显著差别。这主要是因为曲周县位于华北平原地区,这里土层深厚,且在县域范围内不同土层土壤质地和肥力水平变化不大,各土层保水保肥能力相当,只是底层土壤未熟化,如果能保证水肥和农业管理投入,挖损耕地生产能力会很快恢复。建议复垦工作须因地制宜,在平原地区,挖损耕地不超过一定深度且不影响影响耕作的情况下,可以直接恢复耕种,不需用专门的复垦工艺进行挖损耕地的复垦或培肥。 Over the vast rural areas, people dig and borrow soils from the cultivated land for purposes of constriction like build building, brick baking and so forth. As such, losses of cultivated land soils over these areas are significant. Since digging cultivated land usually causes relatively fragmented soils and the farmland often belongs to different individuals, farmers tended not to take advantage of specialized reclamation measures and technologies to restore the fertility of cultivated land; it recovers gradually by natural and farming processes. It is noted that there are numerous studies on land reclamation over damaged areas but little work has been done on the problems mentioned above. In the resent work, the authors performed a study on changes in productivity of damaged cultivated land due to digging prior and after reclamation in Quzhou County in the North China Plain. Several filed investigations were conducted and soil samples were obtained and analyzed in laboratory, with the objective to seek certain ways for cultivated land reclamation. Results showed that there was no significant difference in production capacity for the loss-dug plots compared with the control plots. This could be mainly attributed by that soil is relatively deep and the difference in soil quality between surface soil and subsoil is not obvious due to Quzhou County being located in the North China Plain. The soils over the study site showed considerable water and fertilizer retention and an immature statue of deep layers of soils. Direct re-cultivation/reclamation methods can make the productivity of damaged cultivated land recover if farmers can guarantee the same input and management measures. Particularly, if the management of water, fertilizer and agricultural inputs can all be ensured, the restoration of damaged land production capacity could be fast. Given that the direct reclamation methods can make the soil fertility of damaged cultivated land recover quickly, and this method can effectively reduce reclamation costs, it is s

关 键 词： 挖损耕地 复垦 生产能力 对比分析 曲周县

领　　域： [环境科学与工程]