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当前位置: 首页 > 文章 > 基于~(137)Cs示踪法的滇东喀斯特“红裸土”景观形成的侵蚀证据研究 中国农学通报 2015,31 (24) 195-198
Position: Home > Articles > Erosion Evidence Research of“Red-Bare Soil”Formation in the Karst Area of Eastern Yunnan Based on ~(137)Cs Trace Method Chinese Agricultural Science Bulletin 2015,31 (24) 195-198

基于~(137)Cs示踪法的滇东喀斯特“红裸土”景观形成的侵蚀证据研究

作  者：
余洁芳;王嘉学;许路艳;代云川;肖梦景;赵茜
单  位：
云南师范大学旅游与地理科学学院
关键词：
山原红壤;137Cs示踪法;地表覆被;土壤侵蚀
摘  要：
为定量探究"红裸土"景观形成与土壤侵蚀之间的联系,笔者采用137Cs示踪法,分析了同一坡度3种不同覆被条件下土壤137Cs变化特征。结果表明:该区域的137Cs背景值为878.41 Bq/m2;137Cs在山原红壤剖面中的分布深度较浅,通常在15 cm以内;经测算,云南松林覆被下的土壤侵蚀速率为1252.34 t/(km2·a),草丛覆被下的土壤侵蚀速率为3069.718 t/(km2·a),"红裸土"中未能测到137Cs,土壤侵蚀速率呈现出"红裸土">草丛>松林的侵蚀趋势。山原红壤覆被条件劣化是导致土壤侵蚀速率增大的重要原因,土壤侵蚀是"红裸土"景观形成的重要因素,植被保育是控制"红裸土"景观形成的关键。
译  名：
Erosion Evidence Research of“Red-Bare Soil”Formation in the Karst Area of Eastern Yunnan Based on ~(137)Cs Trace Method
作  者：
Yu Jiefang;Wang Jiaxue;Xu Luyan;Dai Yunchuan;Xiao Mengjing;Zhao Qian;School of Tourism and Geographical Science, Yunnan Normal University;
关键词：
mountain red earth;;137Cs trace method;;land-cover;;soil erosion
摘  要：
In order to study the connection between landscape formation of"red-bare soil"and soil erosion,137 Cs change features of 3 different cover conditions under the same gradient were analyzed by the method of137 Cs trace. The results showed that: the background value of137 Cs was 878.41 Bq/m2; the distribution of137 Cs inthe profile of mountain-bare-soil was relatively shallow, which was within 15 cm usually. The soil erosion rateunder the Yunnan pine forest land-cover was 1252.34 t/(km2·a) and it was 3069.718 t/(km2·a) under grassland-cover, the137 Cs was not detected in the"red-bare soil". The soil erosion rate followed the tendency of"red-bare-soil">grass>pine forest. The worsening condition of mountain red earth land-cover was the fatalfactor which contributed to the increase of soil erosion rate, soil erosion was the critical factor to the formationof"red-bare-soil", and vegetation nursing was the key to control the formation of the"red-bare soil".

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