模拟增温和改变降雨频率对干旱半干旱区土壤呼吸的影响

韩丹, 李玉霖, 杨红玲, 宁志英, 张子谦

Effects of simulated temperature increase and change of rainfall frequency on soil respiration in arid and semi-arid areas

Dan Han, Yulin Li, Hongling Yang, Zhiying Ning, Ziqian Zhang

表4 土壤呼吸速率与土壤温湿度的回归方程

Table 4 Regression equation of soil respiration rate and soil temperature and humidity

处理 方程 R2 P 降雨频率 P16×2.5mm y = 0.0052x2 - 0.18x + 5.3306 0.1299 <0.01 P8×5mm y = 0.1054x2 - 1.7313x + 10.708 0.399 <0.01 P4×10mm y = 0.0248x2 - 0.0553x + 2.089 0.9046 <0.01 P2×20mm y = 0.0111x2 + 0.165x + 1.3561 0.9474 <0.01 P1×40mm y= 0.0128x2 + 0.1674x + 1.3466 0.898 <0.01 温度 增温 y = 1.1818e0.0421x 0.0547 <0.01 不增温 y = 1.0536e0.0449x 0.0543 <0.01