土壤水分胁迫下氮素营养对冬小麦光合生理和环境的关系的影响

EFFECTS OF NITROGEN AND WATER STRESS ON THE RELATIONS BETWEEN ENVIRONMENT AND THE PHYSIOLOGICAL PROPERTIES OF WHEAT PLANT

对冬小麦光合速率 (Pn)、蒸腾速率 (E)、气孔导度 (Gs)和细胞间隙CO2 浓度(Cint)等生理指标与大气CO2 浓度、光合有效辐射、大气温度和大气湿度等环境因子间相关系数作了分析 ;通过求解不同处理相关系数的微分 ,初步研究了大田条件下生理指标对环境因子的灵敏度 ,结果表明 :生理指标与环境间的相关性随施氮量的不同而不同 ;氮素营养改变了生理指标对环境因子响应的灵敏度。

By analyzing the correlations between plant physiological indexes (such as net photosynthetic rate(Pn),transpiration rate(E),stomatal conductance(Gs) and,intercellular CO 2 concentration(Cint)),and environmental factors (such as photon flux density,atmospheric CO 2 concentration,atmospheric temperature,air humidity etc.),and by computing absolute value of differential of the correlation equation,it is found that the correlation between physiologic indexes and environmental factors varies with nitrogen rate,which in turn affects the sensitivity of the physiologic indexes to the environmental factors.