黄土高原半干旱区2020年生长季草地土壤呼吸特征及其影响因素

张琳焓, 闭建荣, 张雪腾, 李正鹏, 赵长明, 马晓俊

Grassland soil respiration characteristics and their influencing factors in semi-arid region of Loess Plateau during the growing season in 2020

ZHANG Linhan, BI Jianrong, ZHANG Xueteng, LI Zhengpeng, ZHAO Changming, MA Xiaojun

表1 2020年生长季土壤呼吸速率与土壤温度和含水量的多元回归模型

Tab.1 Multiple regression model of soil respiration rate with soil temperature and soil water content during the growing season of 2020

模型类型 拟合方程 R2 P 线性 F C O 2 = - 1.791 + 0.124 T S + 8.973 W S 0.663 P<0.001 交叉 F C O 2 = - 0.053 + 0.044 T S - 3.106 W S + 0.596 T S W S 0.735 P<0.001 幂次 F C O 2 = 0.14 T S 1.265 W S 0.557 0.733 P<0.001 复合 F C O 2 = 1.3 - 0.048 T S - 9.618 W S + 0.002 T S 2 + 11.947 W S 2 + 0.742 T S W S 0.740 P<0.001