地理学报 ›› 1985, Vol. 40 ›› Issue (2): 119-130.doi: 10.11821/xb198502003

• 论文 • 上一篇    下一篇

陕北黄土高原的土地类型及其评价

刘胤汉   

  1. 陕西师范大学地理系
  • 出版日期:1985-04-15 发布日期:1985-04-15

LAND TYPES AND THEIR ASSESSMENT ON THE LOESS PLATEAU OF NORTHERN SHAANXI PROVINCE

Liu Yinhan   

  1. Siasnxi formal Univeresity
  • Online:1985-04-15 Published:1985-04-15

摘要: 陕北黄土高原东起黄河峡谷,西至子午岭,南起关中平原北缘,北至长城沿线,是陕西省重要的农、林、牧业生产基地之一。由于水土流失严重,土地利用不合理,导致自然环境恶化,生态平衡失调,影响土地资源潜在生产力的发挥。

关键词: 土地类型, 陕北黄土高原, 河沟, 人类经济活动, 沙滩地, 土石山地, 长城沿线, 黄土源, 主类型, 负地形

Abstract: This article discusses the charactristics and structure of the land types on the Loess plateau of northern Shaanxi pronince, and points out the utilization trend of each land type. It is composed of four sections:1. The land types in this area are maily determined by meso or micro-landforms,including valleys, loess or rock mountains, smcl lands, loess "mao", "liang", "yuan", etc. as well as by human impact upon physical environment.2. A hierarchical scheme for land classification: is suggested Land is chiefly classified by two categories. 10 first level land types are dilimited and identified by macro-landforms. 68 second-level types are characterized by homogeneous meso-or mi-cro-landfonn, soil subtype, vegetation subtype or formation.3. Evolution and structure of land types: are discussed. There are 5 patterns of land type evolution in this region: loess "yuan", loess "liang", loess "mao", loess or rock mountains and sand banks types. Again, there are four types of land structure: ladder-like, recurrent, dendritic and concentric.4. Finally, features and sutability eavaluation of 10 first-level land types are bri-eflv discussed.