免耕对农田土壤持水特性和有机碳储量影响的区域差异

李婧妤,李倩,武雪萍,吴会军,宋霄君,张永清,刘晓彤,丁维婷,张孟妮,郑凤君

Regional Variation in the Effects of No-Till on Soil Water Retention and Organic Carbon Pool

LI JingYu,LI Qian,WU XuePing,WU HuiJun,SONG XiaoJun,ZHANG YongQing,LIU XiaoTong,DING WeiTing,ZHANG MengNi,ZHENG FengJun

表5 气候因子、土壤因子与土壤有机碳储量的Pearson相关系数

Table 5 Correlation coefficients between climate factors、soil factors and soil organic carbon

年均温 Annual average temperature 年降水 Annual precipitation 容重 Bulk density 黏粒含量 Clay 粉粒含量 Silt 砂粒含量 Sand 饱和含水量Saturated moisture 紧实度 Penetrometer resistance 有机碳储量 Organic C storage 年均温 Annual average temperature 1 年降水Annual precipitation 0.126 1 容重Bulk density 0.149 0.106 1 黏粒含量Clay -0.132 0.101 -0.389 1 粉粒含量Silt -0.368 0.023 -0.321 0.902** 1 砂粒含量Sand 0.337 -0.035 0.335 -0.928** -0.998** 1 饱和含水量 Saturated moisture -0.381 -0.589** -0.524** 0.381 0.317 -0.315 1 紧实度 Penetrometer resistance -0.337 0.298 0.084 -0.308 -0.544** 0.538** -0.154 1 有机碳储量 Organic C storage -0.731** -0.708** -0.88 0.46 0.218 -0.194 0.627** -0.538* 1