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一、提高造林质量的意义 植树造林是改善生态环境和满足社会对森林资源需求的主要措施。世界上不少国家都开展过大规模的植树造林活动:美国开展的大草原各州林业工程即罗斯福工程,在美国南部的6个州8年共植树2.17亿株,营建林带总长28962公里,面积约65万公顷,保护了3万多个农场的162万公顷农田;前苏联开展的斯大林改造大自然
First, the significance of improving the quality of afforestation afforestation is to improve the ecological environment and meet the community’s main demand for forest resources. Many countries in the world have carried out large-scale tree planting and afforestation activities: the United States carried out the prairie forestry project of various states namely Roosevelt project. In the six states of the United States in 8 years a total of 217 million trees planted, the construction of forest belt total length of 28,962 km, area of about 650,000 hectares, which protect 1.62 million hectares of farmland over 30,000 farms; Stalin’s transformation of nature by the former Soviet Union