5FISCHER R A,TURNER N C.Plant productivity in the arid and semiarid zones[J].Ann Rev Plant Physiol,1978,29:27-317.
6FISCHER R A D,REES K D,SAYRE Z M,et al.Wheat yield progress associated with higherstomatal conductance and photosynthetic rate,and cooler canopies[J].Crop Sci,1998,38:1467-1475.
7FARQUHAR G D.SHARKEY T D.Stomata cond tahoe and photosynthesis[J].Ann Rev Plant Physiol,1982,33:317-345.