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中文摘要：
林区农户的生计活动都是直接或间接地利用有限的森林资源,收入多样化和森林依赖度在农户保证收入安全方面是具有彼此替代性的。收入来源更为丰富的农户由于面临更高的森林资源收集的机会成本,从而可能更少地投入到林业生产活动中。以甘肃省、广西省、宁夏回族自治区和云南省的756户农户数据为例,通过建立收入多样化对森林依赖的Tobit模型,结果表明：（1）研究区域农户年均林业占农户家庭总收入的10%左右;（2）在控制其他变量的条件下,随着收入多样化系数提高一个单位,研究区域农户林业收入比重降低13%~23%。表明随着农户家庭收入多样化程度的提高,家庭对林业的依赖程度减小。因此,政府可以通过政策、项目扶持农户实现多样化收入,从而缓解森林资源和环境保护的压力,提高林区森林质量。
英文摘要：
Diversification of income is considered to be an effective way to alleviate the pressure of forest cutting.Among many rural households,income diversification and forest dependency can be viewed as substitute sources of insurance. Farmers with diversified income sources enjoy a higher opportunity cost in forest harvesting and tend to allocate fewer labor inputs to forestry activities.The current study uses rural household survey data collected in Gansu Province,Guangxi Province,Ningxia Autonomous Region,and Yunnan Province and applies a Tobit regression model to determine the effect of income diversification on forest dependence.The two main findings of this study are as follows.（ 1） Average annual forest income per household in the study area accounts for nearly 10% of total incomes. Wage income takes up almost 50% of total income in study area.（ 2）When the income diversification index increases by one unit,the proportion of forest income to total income within the study areas decreases by 13%- 23%. This suggests that when the effect of other variables is controlled,a certain level of income-source diversification can significantly reduce a household＇s dependence on forest resources.
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