The Distribution Of Soil Water And Nutrient In Slop Under Different Utilization Styles In The Central Yunnan

The soil is not uniform, continuous changes, it is influenced by soil parentmaterial, topography and human activities and natural factors and human factors, physicalfactors, chemical factors and biological factors, it is human survival and development ofthe important material foundation, soil moisture and nutrients directly restricts theproduction of soil ability. The change law of the red soil of different land use types atdifferent position of slope soil profile soil moisture and nutrient, for rational utilization ofsoil resources, is of great significance to understand the different land use types, soilmoisture and nutrient distribution. This paper selects Small Watersheds in Jianshan Riverin Chengjiang County of Yuxi city as the test area, determination of secondary forest,farmland, plantation and in4different position of slope soil profile soil moisture andnutrient indexes. The results show that:In4types of land use, soil water content was secondary woodland, determination ofthe first day after the rainfall, the soil moisture content of different land use types with therainfall variation is not obvious, but the basic trend is reduced with increase of rainfall, rainfor3days after the determination of4kinds of land use types of moisture content soil isthe soil moisture content determination of rainfall day are more than two days themeasured value, and with the determination of time later, the4land use soil profilemoisture content types showed different levels of reduction; soil total nitrogen and totalphosphorus content of shrub land secondary plantation land>> slope> forest land; thecontent of soil available nitrogen is slope farmland> secondary forest> shrub> plantation;soil available phosphorus content was slope farmland> shrub land> woodland>secondary forest: the content of soil organic matter showed secondary forest>>> slopefarmland irrigation artificial forest and grass land.In different slope positions, for the same type of land use, soil available phosphoruscontent in secondary forest showed middle slope> slope> slope, and content of other soilnutrient index showed a lower position in different degree higher than the top soil, namelythe lower slope slope slope> Middle>.In different soil depth, soil water content in the0-200cm soil layer increased at firstand then decreased, and the4kinds of land use types of irrigation water content of grasssoil maximum at40-80cm soil layer, while the other3land use types showed a maximumat100-140cm soil moisture layer content; content of nutrient indexes the performance ofthe upper soil were higher than the lower soil nutrient content in the0-60cm soil layer,namely0-20cm>20-40cm>40-60cm depth of soil layer.