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中国沙漠 ›› 2000, Vol. 20 ›› Issue (s1): 45-47.

• 论文 • 上一篇    下一篇

内蒙古奈曼旗中部沙地土壤剖面特征

赵学勇, 张铜会, 常学礼   

  1. 中国科学院 寒区旱区环境与工程研究所, 甘肃 兰州 730000
  • 收稿日期:2000-01-15 修回日期:2000-03-20 出版日期:2000-12-31 发布日期:2000-12-31
  • 作者简介:赵学勇(1963-),男(汉族),内蒙古五原人,博士生,副研究员,主要从事沙漠生态学研究。
  • 基金资助:
    国家"973"项目(G1999043400);国家"九五"攻关项目(96-920-13-02);院特别支持项目(KZ95T-04;KZ951-A1-301);院重点项目(KZ-952-91-218);国家重大基金课题(49890330);内蒙科委课题"西部之光"(999078);自然科学基金(990141)

Observation on the Profiles of Sandy Soils in the Middle Part of Naiman,Inner-Mongolia

ZHAO Xue-yong, ZHANG Tong-hui, CHANG Xue-li   

  1. Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China
  • Received:2000-01-15 Revised:2000-03-20 Online:2000-12-31 Published:2000-12-31

摘要: 通过对奈曼旗中部不同沙地土壤剖面特征和有机质含量分布的分析认为:灌溉农田土壤具有8层结构,沙层与粘土层交错叠置。旱作农田土壤虽然也具有8层结构,但是只有一层粘土,撂荒地土壤只有3层,而且完全是沙层,保水保肥性能最差。此外,灌溉农田土壤0~30 cm土层的有机质的含量约0.712 g·cm-3,旱作农田和撂荒地相应土壤层的有机质含量分别只有0.403g·cm-3和0.420 g·cm-3。同一土壤剖面的有机质含量随着深度的增加而减少。

关键词: 沙地, 土壤剖面, 内蒙古, 奈曼旗

Abstract: Several soil profiles were observed in order to find the characteristics of sandy soil.Observation revealed that the profile of irrigated cropland has three layers of clay and five layers of sands overlaid.The soil profile of rainfed cropland includes eight layers,in which only one layer of clay is at the depth around 30 cm,the rest are sand layers.There are three layers of sand in the profile of abandoned cropland.Comparing the differences of the three profiles,it is obvious that irrigated cropland has a capacity of holding water and nutrients higher than that of rainfed cropland and abandoned cropland.Measurement on soil organic matter revealed that irrigated cropland has an organic matter content of 0.712 g·cm-3,while the organic matter content of rainfed and abandoned cropland were 0.403 g·cm-3and 0.420 g·cm-3,respectively.In the same profile,organic matter content decreased with the increase of soil depth.

Key words: sandy land, soil profile, Inner Mongolia, Naiman Banner

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