当前位置: 首页 > 文章 > ~(137)Cs示踪法估算滇池流域土壤侵蚀 核农学报 2005,19 (2) 48-51
Position: Home > Articles > EVALUATING SOIL EROSION RATE IN THE DIANCHI LAKE BASIN USING 137 Cs TRACER METHOD Journal of Nuclear Agricultural Sciences 2005,19 (2) 48-51

~(137)Cs示踪法估算滇池流域土壤侵蚀

作  者:
张燕;彭补拙;陈捷
单  位:
南京大学城市与资源学系;中国科学院南京土壤研究所
关键词:
137Cs示踪法;滇池流域;土壤侵蚀速率
摘  要:
用13 7Cs示踪法探讨滇池流域的土壤侵蚀表明 ,不同利用方式农田的侵蚀量从 2 2 4t km2 yr(菜地 )~ 345 6t km2 yr(园地 )。与太湖地区相比 ,粗放的耕作方式也改变了当地农田的侵蚀排序。特别是土壤中的13 7Cs含量为 35 5~ 872Bq m2 ,比世界其他许多地区都低 ,却与青藏高原相邻地区的数值相近。原因可能是气候特点及远离核试验中心。经与其他方式所得结果比较可见 ,用13 7Cs示踪法研究滇池流域的中长期土壤侵蚀既简便快速又合理可行。
译  名:
EVALUATING SOIL EROSION RATE IN THE DIANCHI LAKE BASIN USING 137 Cs TRACER METHOD
作  者:
ZHANG Yan 1 PENG Bu-zhuo 1 CHEN Jie 2(1.Department of Urban and Resources Sciences, Nanjing University, Nanjing, Jiangsu,210093; 2.Institute of Soil Sciences, Chinese Academy of Sciences, Nanjing,Jiangsu,210008)
关键词:
137Cs tracer method; Dianchi Lake Basin; soil erosion rate
摘  要:
Cs tracer method was used to evaluate the soil erosion rate in the Dianchi Lake Basin. The results indicate that the soil erosion rate of investigated area is about 224~3546t/km 2yr, the changes depend on the sample from different agricultural land. The extensive cultivation and irrigation also increases the erosion rate of dry farmland on sloping fields, the orders of erosion of different land uses differ from the other region, such as Taihu Lake Basin. Particularly, 137 Cs inventories of soil profiles in the Dianchi Lake Basin (355~872Bq/m 2) are lower than those in some other areas of China and the world. The reasons may be its specific climate and location in the outer of the nuclear test base. The soil erosion rates evaluated by 137 Cs tracer method are coincident with the observation of field and other estimated methods. Therefore, 137 Cs tracer method can be used to evaluate mid-term soil erosion rate of the Dianchi Lake Basin.

相似文章

计量
文章访问数: 8
HTML全文浏览量: 0
PDF下载量: 0

所属期刊

推荐期刊