人类生存环境可以视为一个巨大的生态系统,生物是维持这个生态系统平衡的重要因素。自然界中的动物、植物和水、土、光、热之间,其中有一个因素发生变化,就会引起一系列的连锁反应。生态环境的破坏,首先给农牧业生产带来灾难性后果,也危及了人类的生存,农业发展离不开林业,农林牧之间存在着十分密切的生态联系和经济联系。本文着重谈谈怎样发挥林业建设在保持生态平衡中的作用。(一)必须把培育森林放在首位黑龙江省从1962—1964年间森林面积减少12.9%,蓄积量减少14.7%,森林复被率下降了2.3%,多灾的松嫩平原经过将近三十年的努力,森林复被率才提高到5.6%, Human environment can be regarded as a huge ecosystem, and biology is an important factor in maintaining the balance of this ecosystem. There is a series of chain reactions in animals and plants in nature and between water, soil, light and heat. One of these factors changes. The destruction of the ecological environment, first of all, has devastating consequences for the production of agriculture and animal husbandry as well as endangering the survival of mankind. The development of agriculture is inseparable from forestry. There is a very close ecological and economic relationship between agriculture, forestry, animal husbandry and agriculture. This article focuses on how to play the role of forestry in maintaining ecological balance. (1) Cultivation of forests must be given top priority Heilongjiang Province reduced the area of ​​forests by 12.9% from 1962 to 1964, its stock volume decreased by 14.7% and its forest remediation rate decreased by 2.3%. The plagued Songnen Plain, after nearly 30 years of Efforts to increase the rate of forest rehab was 5.6%