摘要
基于田间试验,分析了西藏高寒牧区燕麦气孔导度(Gs)、蒸腾速率(E)、净光合速率(Pn)的日变化规律及其与西藏典型气象因子(大气温度、太阳辐射、空气相对湿度)的关系,并建立了回归模型。结果表明,Gs、E、Pn的日变化分别出现"双峰"、"多峰"、"双峰"的变化规律,最高值分别为6.495mmol/(m2.s)、42.31mmol/(m2.s)、66.46μmol/(m2.s)。燕麦生理指标Gs、E、Pn与高寒牧区典型气象因素的影响显著性关系分别为:Rs>RH>T、RH>Rs>T、T>RH>Rs。
The field experiment was conducted to analyze the diurnal variation of the stomatal conductance (Gs), transpiration rate(E), net photosynthetic rate(Pn), and the relationships between typical meteoro- logical factors such as atmospheric temperature(T), solar radiation(Rs), relative air humidity(RH) and oaths physiological indicators were established by the corresponding regression models. The results showed that the diurnal variations of Gs, E and Pn respectively showed 'bimodal', 'multimodal;, 'bimodal' and the maximum values respectively were 6.495 mmol/(m2 s), 42. 31 mmol/(m2 s), 66.46 μmol/(m2 s). The significant effects of meteorologic factors(Gs, E, Pn) on oat's three physiological indicators were Rs〉 RH〉T, RH〉Rs〉T, T〉RH〉Rs, respectively.
出处
《灌溉排水学报》
CSCD
北大核心
2013年第3期97-100,共4页
Journal of Irrigation and Drainage
基金
中国水科院科研专项基金项目
关键词
西藏
高寒牧区
燕麦
生理指标
气象因子
Tibet
alpine pastoral areal oat
physiological index
meteorological factor