我国在长江上游、黄河上中游实施的退耕还林还草措施，将在试点示范取得经验的基础上稳步推进。国家林业局在杨凌召开的“中国农业高新科技论坛”上透露，“十五”期间，我国计划退耕还林还草２３１万ｈｍ２，力争在生态环境建设方面实现长江上游５年初见成效、１０年大见成效 China’s implementation of the program of returning farmland to forests and grasslands in the upper reaches of the Yangtze River and the upper and middle reaches of the Yellow River will be steadily pushed forward on the basis of the experience gained from pilot projects. The State Forestry Administration revealed at the “China Agricultural Hi-tech Forum” held in Yangling that China plans to return 2.31 million hm2 of cultivated land for forestry and grassland in the “Tenth Five-Year Plan” period and strive to achieve initial success in the upper reaches of the Yangtze River in the past five years in building the ecological environment. 10 Good results in the year