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1 氮添加、刈割及其交互作用对北方农牧交错带温性盐碱化草地土壤呼吸的影响

Table 1 Effects of N addition, mowing and their interactions on soil respiration in saline-alkali grassland in the northern agricultural-pastoral ecotone

因素 Factor df F P 测定时间 Measuring time (Time) 16 35.947 0.000 氮添加 Nitrogen addition (N) 2 3.955 0.020 刈割 Mowing 1 55.789 0.000 测定时间×氮添加 (Time × N) 32 0.547 0.981 测定时间×刈割 (Time × Mowing) 16 11.760 0.000 施氮处理×刈割 (N × Mowing) 2 0.150 0.481 测定时间×氮添加×刈割 (Time × N × Mowing) 32 0.579 0.977