The model uses the concept of light use efficiency (LUE), while change of air temperature, plant-water deficits and respiration reduce the efficiency of light usage, and the model is modified to couple with the ecology model to better represent regional environmental characteristics of the semi-arid grasslands.

Using remote sensing data and ground meteorological station data,we estimated NPP of grassland during the grow-ing season from 1982 to 2003 in Inner Mongolia using the light use efficiency model proposed by Montieth in 1972,and calculated sever.

In order to protect and restore wetland ecosystem, and improve the amount of production of the wetland, the caloric, existent energy value, annual net primary productivity and efficiency for solar energy utilization were measured in a dominant plant community at Binjiang wetland, Zhenjiang in the year 2006.

The author studies on the dynamics of energy production of dominant plants community and its efficiency for solar energy utilization in Binjiang Wetland.

The experiment was conducted to optimize the sowing time of different population of Yumai 18, Lankaoaizao 8, Zhoumai 18, Yumai 49 in Henan, and to research the effect of different sowing time on photosynthetic function and filling rate, Solar energy utilization efficiency, yield of its population.

Photosynthetic carbon assimilating properties were studied in high yield hybrid rices Ⅱ You 129 and Shanyou 63 (as the check) from the point of view of the difference of their solar energy use efficiency .