Analysis of Farmland Soil Nutrient Content of Different Models Planting Patterns and Soil Types

[Objective] The aim was to identify and assess the quality of farmland fertility correctly and provide a more scientific basis for the local precision fertilizer by understanding effects of different typical cropping pattern,soil type,soil texture on soil fertility quality in Jijie Town,Gejiu County,Yunnan Province.[Method] The questionnaires,field soil collection and laboratory analysis were combined.[Result] The soil fertility of vegetables-leisure and vegetables-vegetables rotation were the highest in the different cropping patterns,whose soil nutrients content was close to the extremely rich level,followed by rice-vegetables rotation,rice-leisure rotation,rice-spring corn rotation.The soil fertility of corn-leisure cropping patterns was the lowest.In the different soil types,the calcareous soil fertility was the highest,whose soil nutrients content nearly reached a level of extremely rich or rich,followed by alluvial soil,yellow soil and paddy soil.The red soil fertility was lowest.In the different soil texture,the soil fertility of sandy loam was almost equal to that of light loam and mid loam,but the soil fertility of heavy loam was relatively lower.In all the study area,the soil available potassium was in the middle and below levels,the soil available boron was below the minimum threshold,while other nutrients almost reached the level of extremely rich or rich.[Conclusion] There was a certain difference of soil nutrient content in the different cropping patterns,soil type and soil texture.Therefore,it was necessary to consider the soil nutrient content ostatus,and take full account of effects of different cropping patterns,soil type and soil texture on soil nutrient content,to determine optimum fertilization.