摘要
为探讨滩地综合治理、植树造林对抑制钉螺滋生的效果，在洞庭湖区有螺滩地采用南方型黑杨营造杨树人工林，对造林后活螺框出现率、活螺密度以及林分生长状况等的调查观测结果表明：人工造林后活螺框出现率、活螺密度均呈明显下降趋势，且随林龄增加，其下降幅度增大。在外滩造林不经冬季间种的粗放经营条件下，若以造林第2年春季的螺情为分析基准，12年生潍地杨树林内的活螺密度下降85．2％～100％，活螺框出现率下降80．3％～100％；而同一洲滩，植被为苔草-芦苇的非杨树人工林滩地的活螺密度、活螺框出现率，在11年内分别增加108．2％和120．1％，且杨树人工林内均未发现感染性钉螺。滩地杨树人工林具有很大的碳汇功能（19．42t·hm^-2），对科学评价滩地综合治理的效果及林分价值有重要意义。
Test plot experiments and surveys were conducted to evaluate the effect of forestation on snail population on beach lands of Dongting Lake in Hunan Province, a usually high endemic area for schistosomiasis. Poplar trees were planted in specific designs with careful site preparation, including weeding and ridging. Selected undisturbed sites were used as control experiment. After 11 years of experimentation, snail density and live snail percentage decrease respectively by 85.2% -100% and 80.3% -100% in poplar stands, but increase by 108.2% and 120. 1% under the control treatment. Specifically, no infected snail is found in the poplar stands, and additionally, snail population falls along with the growth and development of the tree plants. Meanwhile, there is a great amount of C sequestration in the poplars and based on the experiment, C sequestration for a 5-year-old poplar stand is 19.42 t· hm^-2. Furthermore, poplar tree cultivation yields additional income to the local farmers along with significant environmental improvement and snail population reduction in forested wet beach areas.
出处
《中国生态农业学报》
CAS
CSCD
2008年第3期701-706,共6页
Chinese Journal of Eco-Agriculture
基金
国家科技支撑计划(2006BAD03A15)资助
关键词
杨树人工林
血吸虫病
活螺密度
抑螺效果
碳汇
Poplar plantation, Schistosomiasis, Snail density, Snail control, C sequestration
