氮和水分添加对内蒙古荒漠草原放牧生态系统土壤呼吸的影响

温超,单玉梅,晔薷罕,张璞进,木兰,常虹,任婷婷,陈世苹,白永飞,黄建辉,孙海莲

Effects of nitrogen and water addition on soil respiration in a Nei Mongol desert steppe with different intensities of grazing history

WEN Chao,SHAN Yu-Mei,YE Ru-Han,ZHANG Pu-Jin,MU Lan,CHANG Hong,REN Ting-Ting,CHEN Shi-Ping,BAI Yong-Fei,HUANG Jian-Hui,SUN Hai-Lian

表3 内蒙古荒漠草原土壤呼吸速率(Rs)与土壤含水量(Ws)的关系

Table 3 Relationship between soil respiration rate (Rs) and soil moisture content Ws in a Nei Mongol desert steppe

放牧强度 Grazing intensity 处理 Treatment n 方程 Equation R2 p CK CKs 24 Rs = 0.12Ws - 0.35 0.44 <0.001 N 24 Rs = 0.09Ws - 0.02 0.30 <0.001 W 24 Rs = 0.08Ws + 0.19 0.28 <0.001 NW 24 Rs = 0.08Ws + 0.10 0.34 <0.001 LG CKs 24 Rs = 0.14Ws - 0.46 0.46 <0.001 N 24 Rs = 0.09Ws + 0.12 0.29 <0.001 W 24 Rs = 0.08Ws + 0.29 0.24 <0.001 NW 24 Rs = 0.09Ws + 0.23 0.34 <0.001 MG CKs 24 Rs = 0.13Ws - 0.34 0.40 <0.001 N 24 Rs = 0.11Ws - 0.08 0.36 <0.001 W 24 Rs = 0.11Ws - 0.04 0.32 <0.001 NW 24 Rs = 0.10Ws - 0.15 0.44 <0.001 HG CKs 24 Rs = 0.10Ws - 0.05 0.34 <0.001 N 24 Rs = 0.08Ws + 0.18 0.25 <0.05 W 24 Rs = 0.09Ws + 0.01 0.31 <0.001 NW 24 Rs = 0.08Ws + 0.31 0.28 <0.001