华北盐渍化草地土壤净氮矿化速率对不同水平氮添加的响应

徐小惠, 刁华杰, 覃楚仪, 郝杰, 申颜, 董宽虎, 王常慧

Response of soil net nitrogen mineralization to different levels of nitrogen addition in a saline-alkaline grassland of northern China

XU Xiao-Hui, DIAO Hua-Jie, QIN Chu-Yi, HAO Jie, SHEN Yan, DONG Kuan-Hu, WANG Chang-Hui

表1 华北盐渍化草地样地土壤基本理化性质(平均值±标准误)

Table 1 Basic soil properties in the experiment sites in a saline-alkaline grassland sample plot of northern China (mean ± SE)

土壤特性 Soil property 2017年本底值 Original value of 2017 pH 9.82 ± 0.11 土壤全碳含量 TC (g·kg-1) 7.01 ± 1.02 土壤全氮含量 TN (g·kg-1) 0.61 ± 0.04 土壤全碳与全氮含量的比 TC:TN 11.57 ± 1.93