地理科学 ›› 1991, Vol. 11 ›› Issue (4): 353-360,392.doi: 10.13249/j.cnki.sgs.1991.04.353

• 论文 • 上一篇    下一篇

松嫩平原西南部土地沙漠化及防治对策

孟宪玺, 吕宪国, 王其存, 黄锡畴   

  1. 中国科学院长春地理研究所
  • 出版日期:1991-07-20 发布日期:1991-07-20
  • 基金资助:
    国家自然科学基金项目;预研究得到所长基金资助

LAND DESERTIFICATION AND CONTROLLING MEASURES IN SOUTHWEST SONGNEN PLAIN

Meng Xianxi, Lu Xianguo, Wang Qicun, Huang Xichou   

  1. Changchun Institute of Geography, Academia Sinica
  • Online:1991-07-20 Published:1991-07-20

摘要: 第四纪以来新构造运动及河床多次变迁,为松嫩平原土地沙化提供了物质基础.春季干燥大风,加之近年降水减少,为土地沙化提供了条件,滥里、滥牧、滥樵是沙化的直接原因.在不同的地形部位建立不同的开发模式,是改善本区生态环境,使沙漠化逆转的根本措施.

Abstract: The natural factors of land desertification in the Songnen Plain are: 1.The neotectonic movement and vicissitudes of riverbed from the Quaternary made a wide distribution of sand deposit in riverbed and flood land,which gives sufficient sand.2.It is windy and arid in spring and the reducing of precipitation in recent years made it much drier.The sand more easily spread. The artificial factors are over cultivation,over grazing and unreasonable firewood collection. Land desertification caused the farmland to be engulfed,ecological environment deteriorated and harmed the life of residents.ln order to control the land desertification,the authors put forward the following measures.1.Readjust the proportion of cultivated,forest and grass land,increase the proportion of forest and grass land.2.Plant trees to prevent the harm of wind and sand,including building a artificial ecological system of arbor,shrub and.grass on dunes,building a compound ecological system of forest,grass land and farm land in flat and ground, and building square forest network in lands that are easily harmed by desertification.3.Construct a model of tree-dimensional ecological system of agriculture between sand lump and pasture.4.In residential area,build a courtyard economic system with the unity of life,production and ecology.5.Make more jnvestment,pursue the policcy of contract considering production.