论文部分内容阅读
基于生态服务价值理论,以遥感数据为基础,以养分损失(N、P、K、有机质含量)、水分损失、土地损失、泥沙滞留损失及泥沙淤积损失等5种损失为度量指标,分别估算南方红壤侵蚀典型区——长汀县1988、2000和2007年3个时期土壤侵蚀经济损失的货币值。结果显示,3年中土壤侵蚀的经济损失相当于同期全县农林牧副渔总产值的31.9%、17.8%和7.02%,呈明显下降态势,特别是2000—2007年间下降更为明显,说明研究区土壤整治成效明显。从损失构成看,土壤养分损失一直占经济损失的97.33%以上,说明土壤侵蚀直接导致土地生产力下降,进而制约农业发展。
Based on the theory of ecological service value and based on remote sensing data, five kinds of losses, nutrient loss (N, P, K, organic matter content), water loss, land loss, sediment retention loss and sedimentation loss, were measured respectively Estimate the monetary value of economic loss of soil erosion in the typical areas of southern red soil erosion - Changting County in 1988, 2000 and 2007. The results showed that the economic loss of soil erosion in three years was equivalent to 31.9%, 17.8% and 7.02% of the total output value of agriculture, forestry, animal husbandry, fishery, animal husbandry and by-catch in the whole county in the same period, showing a marked decline, especially in 2000-2007, indicating that the study District soil remediation effect is obvious. From the perspective of loss structure, the loss of soil nutrients has accounted for more than 97.33% of the economic loss, indicating that soil erosion directly leads to the decline of land productivity and thus restricts the development of agriculture.