The Characteristics of Soil Nutrients in Terracing Land under Different Land Use Patterns in Three Gorges Reservoir Area

In this study, taking the typical terracing land in Wushan County of Chongqing Municipality for example, we study the distribution of soil nutrients in the terracing land under different land use patterns in Three Gorges Reservoir Area. We conduct field survey and sampling on three different land use patterns (cash crop land, food crop land and abandoned land), and do the indoor experimental analysis of soil nutrient indicators. The results indicate that there is significant or very significant impact on soil nutrients under different land use patterns. The content of soil organic matter declines in sequence from abandoned land, food crop land to cash crop land; the content of soil N declines in sequence from cash crop land, abandoned land to food crop land; the content of soil P declines in sequence from cash crop land, food crop land to abandoned land; the content of soil K declines in sequence from abandoned land, cash crop land to food crop land. The result is in close relation to land use patterns, human cultivation activity, land disturbance and application of fertilizer