关键词: 光系统Ⅱ, 叶绿素荧光参数, 牧草, 塔克拉玛干沙漠

Abstract: This paper analyzed the present status of China agricultural water and soil environment.It was indicated that the agricultural water environment in this country was more serious,with the affected area being approximately 20% of the total farmland,and 5% of it being severely affected.More attention should be paid to the pollution of agricultural chemicals in soil environment.The impacts of industrial wastes,urban sewage and garbage,agricultural chemicals,and soil erosion on agro-environment were discussed,with the impact degree of these factors analyzed.The major problems in China agricultural environment melioration were presented,related researches and major countermeasures in this country and developed countries were reviewed,and relevant measures and suggestions on improving the agricultural environment quality of China were put forward.

Key words: PSⅡ, chlorophyll fluorescence parameter, pasture, Taklamakan Desert