Relationship Between Photochemical Reflectance Index and Light Use Efficiency in Growth Duration of Wheat
小麦生长过程中光能利用率和光化学反射指数的相关性研究

Different types of wheat were selected to study the time effect on relationship between photochemical reflectance index and light use efficiency in the whole growth duration.The results prove that photochemical reflectance index is not a feasible index of light use efficiency in the growth duration of wheat.There is not an obvious relationship between photochemical reflectance index and light use efficiency in the early and mature stage of wheat because of influences of chlorophyll contents and leaf area index; regression coefficients R2 are 0.222 4 and 0.210 6 respectively.For the stages with maximum growth capabilities,photochemical reflectance index has provided a reliable method in estimating light use efficiency with regression coefficients R2 of 0.612 7,0.641 2 and 0.601 1 respectively.Therefore,other parameters should be introduced to improve the feasibility of PRI and enhance the precision of LUE estimation.