本文简要总结了我国“三北”防护林地区土地资源的区域分异、质量、数量及防护林体系的开发潜力。

The"Three Norths" shelter forest region occupies 41% of the territory.The region is divided into 1 2 natural districts in this paper according to the differentiation of land resources.The land is divided into 9 quality grades,Land suitable for farming is 26.1%,That for arbor is 14.09%.The percentage of land for bush is 9.5%,and for stock raising is 16.33%.Land for other uses makes up 33.94%.Compared with the present land use situation,the area of land for farming can be increased by 2.87%,and land for arbor and for bush can be increased by 9,09% and 6.66%respectively,The area of land for stock raising shouldbe decreased by 17.57%.This shows that in the process of land use structure adjustment,farmland can be increased and grass land should be decreased to develop arbor-bush-stock raising shelter system.