【摘要】 2013年5-7月开展了高羊茅(Festuca arundinacea)草坪的环境因子(空气温度、空气相对湿度、太阳总辐射、冠层净辐射、土壤含水量和风速)的实时观测,以其实际测定值来测算高羊茅草坪成坪期连续时段的冠气温差值,研究不同天气条件下的草坪冠气温差日变化规律、灌水条件下的冠气温差日变化规律,并分析草坪冠气温差与环境因子的数量关系。结果表明:冠气温差与RH和VPD的相关性极显著,可用作为诊断草坪水分状况的重要指标,为草坪草水分状况诊断提供重要的参考依据。更多还原

【Abstract】 During May to July in 2013,environmental factors were observed in real-time including air temperature,air relative humidity,total radiation,net radiation,soil water content,wind speed on the lawn,and the canopy-air temperature difference of the tall fescue lawn conditions was calculated in continuous-time period.This paper studied the diurnal variation of canopy-air temperature difference under different irrigation and weather conditions and analyzed their data characteristics of environmental impact.The correlation equation between Tc-Ta and environmental factors show that canopy-air temperature difference has a good relationship with RHand VPD,which can reflect soil water status well and provide theoretical basis for the soil water content of the lawn’s diagnosis.更多还原