应中国科学院地理所邀请,加拿大多伦多大学地理系陆兆熊教授于去年9月14日至24日考察了离石、中阳、柳林、太原市北郊区等典型水土流失区及综合治理效益,并与当地科技人员和小流域治理承包户进行了座谈,分别在太原市和吕梁行署举行了两次学术报告会。陆教授对黄土高原土壤侵蚀研究很感兴趣,愿意和中国学者一起研究探讨: 一、研究黄土结皮和犁底层对土壤入渗的影响。他说在暴雨作用下,缺乏有机质的黄土,表层很可能产生结皮现象。根据国外学者试验,有结皮的土壤和无结皮的土壤入渗率可差5～10倍。消除表土结皮和犁底层土壤坚硬的问题,可提高土壤入渗率,减少 At the invitation of the Institute of Geography, Chinese Academy of Sciences, Prof. Lu Zhaoxiong, Department of Geography, University of Toronto, Canada, investigated the typical soil and water loss areas and comprehensive management benefits of Lishi, Zhongyang, Liulin and the northern suburbs of Taiyuan from September 14 to September 24, Local scientists and technicians and small basin management contractors held informal discussions and held two academic seminars respectively in Taiyuan and Luliang administrative offices. Professor Lu is very interested in the study of soil erosion in the Loess Plateau and is willing to study and discuss with Chinese scholars: First, study the influence of loess crust and plow on soil infiltration. He said that under the heavy rain, the lack of organic loess, the surface is likely to produce crusting phenomenon. According to foreign scholars test, the soil with crusts and non-crust soil infiltration rate of 5 to 10 times worse. Elimination of topsoil crust and plow bottom soil hard problem, can improve soil infiltration rate, reduce