北方农牧交错带温性盐碱化草地土壤呼吸对不同形态氮添加和刈割的响应

胡姝娅,刁华杰,王惠玲,薄元超,申颜,孙伟,董宽虎,黄建辉,王常慧

Response of soil respiration to addition of different forms of nitrogen and mowing in a saline-alkali grassland in the northern agro-pastoral ecotone

HU Shu-Ya,DIAO Hua-Jie,WANG Hui-Ling,BO Yuan-Chao,SHEN Yan,SUN Wei,DONG Kuan-Hu,HUANG Jian-Hui,WANG Chang-Hui

表2 氮添加、刈割及其交互作用对年平均土壤累积碳排放量的影响

Table 2 Effects of N addition, mowing and their interactions on annual cumulative carbon emissions.

df F P 固定效应 Fixed effects 氮添加 Nitrogen addition (N) 2 6.751 0.005 刈割 Mowing 1 0.124 0.728 氮添加×刈割 (N × Mowing) 2 0.239 0.789 随机效应 Random effects 小区 Block - 1.313 0.189