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三江平原是我国著名的沼译化冲积低平原,自然资源十分丰富,是黑龙江省重要的大农业生产基地。研究三江平原合理的森林覆被率,对合理的确定森林在三江平原占地比例,迅速恢复三江平原的森林生态系,克服自然灾害有着重要的意义。 本文从森林的作用这个方面,分析森林覆被率与降雨、蒸发量、气温、风的关系,并进一步分析森林覆被率与自然灾害的关系。提出: 平原区的森林覆被率为15％～25％; 半山区的森林覆被率为26％～50％; 山区的森林覆被率为50％以上。 三江平原平均森林覆被率为36％～40％。 为恢复三江平原森林,必须认真贯彻执行《森林法》,加速绿化荒山荒地的步伐,坚持合理采伐,加强幼中龄的抚育,大搞综合利用和多种经营,放宽林业政策,加快林业改革。
The Sanjiang Plain is a famous low-alluvial alluvial plains of our country with rich natural resources and an important agricultural production base in Heilongjiang Province. To study the reasonable forest cover rate in the Sanjiang Plain is of great significance to the rational determination of forest area in the Sanjiang Plain, rapid restoration of forest ecosystems in the Sanjiang Plain and overcoming natural disasters. This paper analyzes the relationship between forest cover rate and rainfall, evaporation, air temperature and wind from the aspect of the role of forest and further analyzes the relationship between forest cover rate and natural disasters. Proposed: the plain area of forest cover rate of 15% to 25%; Mid-levels of forest cover rate of 26% to 50%; mountainous area of forest cover rate of 50%. The average forest cover in the Sanjiang Plain is 36% -40%. In order to restore forests in the Sanjiang Plain, we must earnestly implement the “Forest Law”, accelerate the pace of greening barren hills and wilderness, persist in reasonable harvesting, strengthen middle-aged tending, vigorously promote comprehensive utilization and diversification, relax forestry policies and speed up forestry reform.