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3 北方农牧交错带温性盐碱化草地土壤呼吸与土壤微生物, 土壤理化性质的相关性

Table 3 Pearson’s correlation between soil respiration and soil microorganisms, and soil physical and chemical properties of saline-alkaline grasslands in the northern agricultural-pastoral ecotone

SR NH4+ NO3- BNPP AGB BGB Litter MBC MBN MBC/MBN DOC SR 1.000 NH4+ -0.412** 1.000 NO3- -0.321** 0.450** 1.000 BNPP 0.072 0.108 0.295* 1.000 AGB -0.013 0.468** 0.433** 0.233* 1.000 BGB 0.005 -0.139 -0.358** -0.102 -0.032 1.000 Litter -0.189 0.622** 0.536** 0.180 0.489** -0.193 1.000 MBC 0.253* -0.363** -0.372** -0.029 -0.138 0.380** -0.337** 1.000 MBN 0.191 -0.314** -0.248* -0.231 -0.219 0.316** -0.281* 0.561** 1.000 MBC/MBN 0.026 0.166 -0.066 0.215 0.043 0.162 0.026 0.185 -0.306** 1.000 DOC 0.194 -0.190 -0.410** -0.180 -0.134 0.187 -0.341** 0.327** 0.096 0.064 1.000