吉林省西部沙化土地持续农业体系建立的实践

吉林省沙化土地的８７．９％分布在吉林省西部白城、松原半干旱地区，统属科尔沁和松嫩沙地，面积９２１６．５ｋｍ２，占吉林省西部总面积的１９．６％。８年（１９８６年～１９９３年）实践证明：针对沙地环境特点建立的“乔、灌、草”、“果、药、杂”、“田、林、草”为主体的三种持续农业体系效果明显。

ESTABLISHMENT OF SUSTAINABLE ARICULTURAL SYSTEM ON THE SANDIFICATION LAND IN THE WEST OF JILIN PROVINCE

87. 9% sandy land of Jilin Province is distrbuted in Baicheng and Songyuan semiaridzone, which belongs to the Horqin and Songnen sandy land. The area is 9216. 5 km2, occupying19. 6% of the area of the west of Jilin Province. The sandification land plays an important role indeveloping economy of the area. Through 8-year practices from 1986 to 1993, we have succesfullyestablished three sustainable agricultural systems in different environments of different types ofsandification lands. The first sustainable agricultural system is to "plant trees, shrubs and foddergrasses". The second one is to "plant fruit trees, medical plants and coarse grains". The third one is to"plant food crops, trees and fodder grasses". We have found out a new way to utilize the invisibleresources as best as we can and to develop the economy on the sandification land.