Analysis of soil nutrient situation under different cultivated land use types

Taking Qingzhou County as a case study, based on the systematic field survey and experimental analysis to get a database of soil nutrients, this paper systematically analyzed the differences of seventeen soil nutrient items under five cultivated land use types by the method of mathematical statistics analysis. The impacts of different cultivated land use types on soil nutrients were discussed. The result shows the significant influence of different cultivated land use types on soil organic matter and macronutrients, exchangeable Ca, Mg, available Si, Zn, B, soil pH value and total salt content. Because of the large amount of fertilization and higher biological output on vegetable lands, the contents of most soil nutrients in vegetable land are higher than those in farmlands. However, the content of available Si in farmlands is obviously higher than that in vegetable lands. The pH value of farmlands is higher than that of vegetable lands and total salt content in vegetable lands is higher than that in farmlands. Among dry land, irrigated land and open vegetable land, available P has the maximal variance, while in protected vegetable lands the total N and available S have the maximal variance. This study will have a positive significance for exploring the effects of cultivated land use types on soil nutrients and for the reasonable use and protection of cultivated land resources.