气象因子对麦田土壤呼吸速率影响的通径分析

目的]研究不同天气条件下气象因子对土壤呼吸速率的影响。方法]对拔节期麦田不同天气条件下影响土壤呼吸速率的气象因子进行通径分析。结果]在晴天，5cm地温、太阳辐射、空气相对温度和空气温度与土壤呼吸速率的相关性均达到极显著水平，太阳辐射和5cm地温是影响土壤呼吸速率的主要气象因子；在阴天，太阳辐射是影响土壤呼吸速率的主要气象因子。结论]晴天的土壤呼吸速率及剩余通径系数均高于阴天，说明土壤呼吸速率除了受地温、气温、太阳辐射和空气相对湿度影响外，还受其他因素尤其是生物因素的影响。

Path Analysis on the Meteorological Factors Impacting Soil Respiration Rate of Wheat Field

Objective] The experiment aimed to study the effects of meteorological factors under different weather conditions on soil respiration.Method] The path analysis was used to analyze meteorological factors which influenced soil respiration of wheat field under different weather condition and at jointing stage.Result] In sunny day,the correlations between ground temperature at 5 cm,solar radiation,air relative humidity,air temperature and soil respiration were all at significant level while solar radiation a...