Abstract:
【Objective】 To carry out omprehensive evaluation of soil nutrients in orchard of Yecheng County, Xinjiang and provide reference for regional soil nutrient management and fertilization decision.
【Method】 Based on the data of 782 soil samples in Yecheng County, Xinjiang, five nutrient indexes were obtained: organic matter, total nitrogen, hydrolytic nitrogen, available phosphorus and available potassium, three principal components were obtained by SPSS running principal component analysis. Scores of main components and comprehensive scores of soil nutrients were calculated respectively. SPSS average clustering process was used to classify soil nutrient scores. According to the classification results of soil nutrient comprehensive evaluation score, the township level corresponding to the sample points was located.
【Result】 The comprehensive scores of soil nutrients were divided into four categories: very high, high, middle and low, respectively. The ratio of sample number was 2.69%, 20.46%, 41.94% and 34.91%, respectively; Ratio of sample number to middle and low class partition reached 76.85%. Significantly higher nutrients are mainly distributed in the township of Sayibago. The high nutrients were mainly distributed in the townships of Sayibago, Tuguqi, Yitikong, and Usakkashi. The middle nutrient contents were mainly distributed in the townships of Sayibague, Gaytimuk, Yitimu, Jiangles Grain Farm and Chaerbagg. Lower nutrients were mainly distributed in Xiahe Township, Yitimukong Township.
【Conclusion】 The distribution of soil nutrients in Yecheng County was uneven, and the soil nutrient synthesis was of middle and low level. The first principal component was comprehensive reflection of organic matter and total nitrogen; The second principal component reflects soil nutrient supply status of available potassium content; Third principal component is describing effective phosphorus content.