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生态协调涉及到国民经济各个方面,然而森林是陆地生态的主体,它不仅能提供陆地动物所需要的三分之二的生物资源,而且更为重要的是美化和保护环境等多方面的生态效益,因而森林在生物系统中有着举足轻重的作用,在一定区域内成为调节生态的杠杆。牡丹江市的林业建设,建国以来取得了很大成绩。但也出现一些值得重视的问题和矛盾。主要是对森林保护的不好,经营粗放,导致天然林破坏严重,比例急剧下降,人工林树种结构单一,纯林连片,从而局部地区出现了生态失调。例如,1980年和1966年相比,天然林减少了265万亩,为这一阶段人工林增长面积的一点六七倍,森林面积
Ecological coordination involves all aspects of the national economy. However, forests are the main body of terrestrial ecology. They not only provide two-thirds of the biological resources required for terrestrial animals, but more importantly, the ecological benefits of landscaping and environmental protection Therefore, the forest plays a decisive role in the biological system and becomes the lever of ecological regulation in a certain area. Mudanjiang City, forestry construction, has made great achievements since the founding of the country. However, there are some problems and contradictions worthy of attention. Mainly for the protection of the forest is not good, extensive operation, resulting in serious damage to natural forests, a sharp decline in the proportion of plantation tree species single, pure forest contiguous, resulting in some areas of ecological disorders. For example, compared with 1966 in 1980, the natural forest was reduced by 2.65 million mu, accounting for 1.67 times of the growth area of planted forests at this stage. The forest area