定西地区生态修复效果研究

生态修复期间,不同土地类型上植被响应最明显的是植被盖度和生物量;生态修复调节径流、减少土壤流失的作用非常明显,减水减沙效果以退耕草地最好,其次为灌木林地和乔木林地,荒坡草地最差;生态修复有助于土壤的正向发育,能够提高土壤有机质和氮磷含量。生态修复的重点是先要保护退耕地和林草地,其次是荒地。

Effect of Ecologic Rehabilitation of Dingxi Region

During the ecologic rehabilitation,the most obvious vegetation response on different types of land is vegetation coverage and biomass;the function of runoff regulation and soil loss reduction is remarkable;the effect of water and sediment reduction of the grassland which used to be cultivated land is the best,shrubbery and arboreal lands the second and waste slope grassland the worst and;ecologic rehabilitation is conductive to the forward development of soil and can increase the content of organic matter and nitro-phosphorous of soil.The key point of ecologic rehabilitation is to firstly protect the returned land,woodland and grassland and then the waste land.