土地整理中土壤肥力保持价值比较研究

土地整理不可避免地会对项目区的环境要素及其生态过程产生影响,基于生态服务价值理论,对邛崃市孔明乡土地整理项目区不同整理类型土壤肥力保持价值进行了比较研究,可为该地区土地整理决策、土地整理质量与效益评价等提供定量依据.结果表明,土壤肥力保持每公顷累积价值土地开发区为1.51万元,土地复垦区1.85万元,土地整理区0.49万元.土地复垦区积累价值率达到147.2%,远大于开发区和整理区,这一结果与复垦区土壤全部通过客土改造有关.土地整理后项目区土壤肥力保持总价值增加了733.88万元,其来源一是新增耕地面积,二是农地地力的提高.土壤肥力保持效费比分别为开发区0.05,复垦区0.09,整理区0.46,效益以土地整理区最高.说明以改善农业基础设施、提高地力为主要特征的土地整理类型投资少,土壤肥力保持效益高,值得提倡.

The comparative study on the value of maintaining soil fertility for land consolidation

Land consolidation will unavoidably impact the environmental elements and ecological process, we conducted a comparative study on soil fertility''s maintaining value in different types of Qiong Lai city''s land consolidation program zone base on the theoretical value of ecosystem services, which can provide quantitative basis for the land consolidation decision-making, quality and efficiency evaluation. The results show that, soil fertility keeps accumulated value of land development zone 15100 RMB per hectare, and land reclaim zone 18500 RMB, and land consolidation zone 4900 RMB. The rate of accumulated value of land reclaim zone reachs to 147.2%, which higher than land development zone and land consolidation zone. This result related to the land reclaim zone by soil transformed. The total value of soil fertility in program zone after land consolidation keeps increasing 7338800 RMB, which comes from the increased cultivated land and the improvement of family land. The soil fertility keeps scale in development zone is 0.05, reclaim zone is 0.09, consolidation is 0.46, from which land consolidation have highest benefit. It shows that improve agricultural infrastructure and improve soil fertility as the main characteristics of the type of land investment in less-effective to maintain soil fertility, should be advocated.