ass日本风韵熟妇pics男人扒开女人屁屁桶到爽|扒开胸露出奶头亲吻视频|邻居少妇的诱惑|人人妻在线播放|日日摸夜夜摸狠狠摸婷婷|制服 丝袜 人妻|激情熟妇中文字幕|看黄色欧美特一级|日本av人妻系列|高潮对白av,丰满岳妇乱熟妇之荡,日本丰满熟妇乱又伦,日韩欧美一区二区三区在线

The effects of environmental factors, such as soil moisture (SW), air temperature (T), air relative humidity (RH) and photosynthetic active radiation (PAR) on stomatal conductance (Gs) and total hydraulic conductance of soil—plant system (Kt) under steady flow condition were analyzed, and regulation effects of these impact factors on plant transpiration were investigated. Greenhouse cucumber was used as the experimental material, based on the design of composite quadratic orthogonal regressive rotation where the artificial climate box was adopted, the main effects, single effects and marginal effects of four environmental impact factors on Gs and Kt were interpreted. The results showed that all environmental factors exerted positive effect on Gs and Kt, interaction effect was also found between SW and PAR, T and RH on Gs and Kt. The single effect of RH can be described by a parabolic function and those of other impact factors were described as linear function, which were increased with increase of Gs and Kt. The marginal effects of each impact factor on Gs and Kt showed that RH was the main regulating path for Gs, and all the impact factors except PAR efficiently regulated Kt. The regulating effects of the four environmental factors, Gs and Kt on transpiration were analyzed with paths and correlation analyses. The results showed that T, PAR and Gs mainly exerted indirect positive effect on transpiration bystrengthening Kt, which was followed by the direct positive effect on transpiration. SW mainly exerted indirect positive effect on transpiration by strengthening both Kt and Gs. RH exerted direct negative effect, while its main effect path was exerting indirect positive effect on transpiration by promoting Gs and Kt. Both Gs and Kt were remarkably responded to the four environmental impact factors and interactively regulated the transpiration synergistically.