兴国县低丘侵蚀紫色砂页岩开发利用与治理的研究之一──生态重建的方法及经济效益

A STUDY ON THE DEVELOPMENT,UTILIZATION AND CONSERVATION OFTHE ERODED LOW HILL PUKPLE STONE AREA IN XINGGUO COUNTY──methods and economic benefits of ecosystem restoration

经过多年的探索和研究，本文首次提出了对不同岩性、地形、水文和社会经济条件下的低丘侵蚀紫色砂页岩进行人工爆破成土和重建人工复合生态系统的方法体系。研究表明，在重建的人工生态系统内，种植的农作物当年就可收获并获得很好的经济效益，栽种果树也生长良好，并于第３年开始挂果。用于生态重建的资金投入次年就可全部收回。

Man-made crops-grasses and fruit trees──(crops)──grasses mixed ecosystems wereestablished on the bare surface of the purple stone,skipping the natural soil formation processand ecological evolution process with a series of techniques such as explosion to form soil andre-establishment of ecosystem. The results of the study indicated that the soil fertility hadbeen improved greatly by adding large amount of organic fertilizers and careful cuItivation af-ter the rebuilding of the ecosystem, showing that :1) the soil organic matter had increasedvery remarkably which went up from 3.112g/kg when the soil formed to 5.76 g/kg 3 yearslater,2)soil total nitrogen had increased remarkably, 3)soil organic phosphors, availabIe ni-trogen and phosphors had increased very remarkably,4)the amount of various soil micro-or-ganisms had increased remarkably year by year.