护岸柳树表层根系生长的影响因素  

Surface Root System in Three Types of Willow Revetment

作　　者：王兵[1] 高甲荣[1] 陈琼[1] 王舒[1] 张栋[1] 郭凯力 

机构地区：[1]北京林业大学,北京100083

出　　处：《东北林业大学学报》2014年第12期26-29,42,共5页Journal of Northeast Forestry University

基　　金：国际科技合作项目(2009DFA32490)

摘　　要：对北京市怀柔琉璃河处5 a期的柳树土壤生物工程护岸实验基地研究发现,柳树有在近水面的地方生发大量层状根系的特性,有较好的护岸作用。为了更好利用柳树的这种特性进行生态护岸,对3种柳树护岸形式中表层根系的生长影响因素进行了调查研究。结果表明,灌丛垫护岸形式比扦插和篱墙的护岸形式具有更好的提高和保持土壤含水量的作用;灌丛垫和篱墙的护岸形式有利于提高土壤的有机质质量分数,其中灌丛垫最为明显;3种柳树护岸形式中灌丛垫的表层根系生发状况最好,篱墙要好于扦插;土壤含水量是柳树表层根系生长的主要影响因素和限制性因素,当土壤含水量低于限制值(调查区为10%)的时候,柳树几乎不能生发表层根系;而当土壤含水量在大于限制值时,表层根系的生长随着含水量的增加而变好;在其他条件相同的情况下,较高的土壤有机质质量分数有利于表层根系生发。根据研究结果,提出了一种柳树复合护岸模式。By studying five-year willow soil bioengineering revetment experimental base located at Liuli River in Huairou Dis -trict, Beijing, we found willow had a large number of layered roots near the water and could protect the shore well .We studied surface root system growth factors of three types willow revetment to better take advantage of the feature for develo -ping ecological revetment .The shrub revetment had better effects of improving and maintaining soil moisture compared with cutting revetment and fence revetment .Shrub and cutting revetment could improve the soil organic matter content with the most obvious effect .Shrub growth situation of surface roots was the best among three types of willow revetment , fences was better than cutting revetment .Soil moisture was the restricted growth factor and important factor of willow surface root sys-tem.When the soil moisture content was lower than the limit certain radioactive -polluted area （ 10%） , the willow surface root could hardly grow well .When soil moisture content was greater than the limit , willow surface root grow with the in-crease of water content and changed better .When other conditions were same , the higher content of soil organic matter was advantageous to the growth of surface root.

关 键 词：土壤含水量 土壤有机质含量 生态护岸 土壤生物工程 

分 类 号：TV85[水利工程—水利水电工程]