近35年红壤稻区土壤肥力时空演变特征—以进贤县为例

王远鹏,黄晶,孙钰翔,柳开楼,周虎,韩天富,都江雪,蒋先军,陈金,张会民

Spatiotemporal Variability Characteristics of Soil Fertility in Red Soil Paddy Region in the Past 35 Years—A Case Study of Jinxian County

WANG YuanPeng,HUANG Jing,SUN YuXiang,LIU KaiLou,ZHOU Hu,HAN TianFu,DU JiangXue,JIANG XianJun,CHEN Jin,ZHANG HuiMin

表3 1982、2008和2017年进贤县土壤各肥力指标主成分分析结果与指标权重

Table 3 Results of principal component analysis and weights of fertility factors in Jinxian County in 1982, 2008 and 2017

年份 Year 肥力指标 Fertility factor 主成分 Principal component 综合得分 Score 指标权重 Weight PC1 PC2 PC3 PC4 1982 pH 0.160 0.012 -0.132 0.975 0.229 0.187 SOM 0.853 -0.156 -0.176 0.230 0.201 0.165 AN 0.854 0.265 0.192 0.019 0.331 0.271 AP 0.056 0.982 0.073 0.009 0.252 0.206 AK 0.011 0.076 0.980 -0.132 0.208 0.170 特征值 Eigenvalue 1.486 1.065 1.051 1.022 贡献率Contribution rate (%) 29.716 21.295 21.011 20.445 累计贡献率 Cumulative contribution rate (%) 29.716 51.011 72.022 92.468 2008 pH 0.876 0.258 0.161 -0.026 0.302 0.294 SOM -0.092 -0.082 0.062 0.985 0.189 0.184 AN -0.684 0.392 0.364 0.201 0.052 0.051 AP 0.017 0.063 0.975 0.056 0.254 0.247 AK 0.080 0.949 0.061 -0.097 0.230 0.224 特征值 Eigenvalue 1.251 1.131 1.116 1.025 贡献率 Contribution rate (%) 25.019 22.622 22.318 20.49 累计贡献率 Cumulative contribution rate (%) 25.019 47.641 69.959 90.449 2017 pH 0.905 -0.124 -0.024 0.132 0.222 0.210 SOM -0.091 -0.051 0.984 -0.089 0.169 0.160 AN 0.637 0.504 -0.213 -0.130 0.204 0.193 AP 0.062 0.050 -0.085 0.980 0.230 0.218 AK -0.038 0.937 -0.019 0.078 0.231 0.219 特征值 Eigenvalue 1.238 1.153 1.022 1.009 贡献率 Contribution rate (%) 24.762 23.062 20.448 20.189 累计贡献率 Cumulative contribution rate (%) 24.762 47.824 68.272 88.461