[1]张素红,李森,严平,等.粤北石漠化地区137Cs分布特征与背景值研究[J].水土保持研究,2007,14(06):361-364.
　ZHANG Su-hong,LI Sen,YAN Ping,et al.137Cs Distribution and Its Reference Inventory in Rocky Desertification Land in North Guangdong[J].Research of Soil and Water Conservation,2007,14(06):361-364.
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粤北石漠化地区137Cs分布特征与背景值研究

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 14 期数: 2007年06期 页码: 361-364 栏目: 出版日期: 1900-01-01
Title:
137Cs Distribution and Its Reference Inventory in Rocky Desertification Land in North Guangdong
作者:
张素红1,2, 李森3, 严平1,2, 魏兴琥3, 高尚玉1,2
1. 北京师范大学 防沙治沙教育部工程研究中心 中国沙漠研究中心, 北京 100875;
2. 北京师范大学 资源学院, 北京 100875;
3. 佛山大学 资源与环境科学研究所, 广东 佛山 528000
Author(s):
ZHANG Su-hong1,2, LI Sen3, YAN Ping1,2, WEI Xing-hu3, GAO Shang-yu1,2
1. MOE Engineering Center of Desertification and Blown-sand Control at Beijing Normal University, China Center of Desert Research, Beijing 100875, China;
2. College of Resources Science and Technology Research, Beijing Normal University, Beijing 100875, China;
3. The Resource and Environmental Science Research Institute, Foshan University, Foshan, Guangdong 528000, China
关键词:
石漠化; 137Cs分布; 背景值; 粤北
Keywords:
karst rocky desertification; 137Cs distribution; 137Cs reference inventory; north of Guangdong province
分类号:
S157.1
摘要:
土壤侵蚀是决定土壤中137Cs含量及其再分配的主要因素。粤北岩溶山区137Cs背景值为（1 433.60±131.40）Bq/m2，低于北半球的平均值，137Cs剖面分布基本符合指数分布形式。石漠化地区土壤137Cs活度平均为（6.54±0.57）Bq/kg，土壤中137Cs水平随石漠化程度增加有先降低后升高的趋势，表明在重度石漠化阶段，土壤活动已由侵蚀转为沉积。
Abstract:
Soil erosion is the key factor that determined the 137Cs content in soil and its redistribution.In karst rocky mountain areas in North Guangdong, the value of 137Cs reference inventory is calculated to be (1 433.60±131.40) Bq/m2, which is lower than the global average value of Northern Hemisphere.The depth distribution of 137Cs approximatively agrees to the exponential type.And the 137Cs activity of rocky desertification land ranges from (0.65±0.29) Bq/kg to (17.48±1.03) Bq/kg, and average to be (6.54±0.57) Bq/kg.Along with the intensification of rocky desertification, 137Cs activity in soil decreases in earlier stage and increases later.It indicates that the process of soil erosion has gradually changed into the process of soil deposition.

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备注/Memo

收稿日期:2007-1-13。
基金项目:国家自然科学基金项目（30471421）
作者简介:张素红（1971- ），女，新疆哈密人，博士，主要从事土地退化研究。

更新日期/Last Update: 1900-01-01