中国森林覆盖率变化英语作文1949-2003

中国森林覆盖率变化英语作文1949-2003

Based on the historical documents,modern survey statistics and previous research results,the trend and main process of forest dynamic change were recognized.Combined with the data of modern national forest resources inventory,the forest area and forest coverage rate of each province in China from to were predicted,and the temporal and spatial dynamics of China's forests in recent years were quantitatively analyzed.The results show that in recent years,the existing forest area in China has decreased by hm2,and it has the trend of reduction and recovery before the s,and the trend of accelerating the conversion of cropland within the year.

After the s,the forest area has increased rapidly and increased by hm2 within the year.The study also shows that there is a significant gap in forest dynamics in Western China The forest coverage in most provinces of Heilongjiang Province,Jilin Province,Sichuan Province and Chongqing City,Yunnan Province,Yunnan Province,and

the

western

provinces

in

the

recovery

period and

decreased,Xiang,Gansu,Inner Mongolia,Sichuan,Yunnan,Tibet,Xinjiang

Qinghai provinces The growth rate of eastern provinces and autonomous regions exceeded

that

of

Guangdong

Hainan,Xingu,Anhui,Beijing

Tianjin

Hebei,Shandong,Henan,Zhejiang and Fujian.