摘要
对流动沙丘上栽植的6年和11年生小叶锦鸡儿灌木林防风固沙效应进行了测定与分析,研究结果表明：（1）在小叶锦鸡儿灌木林内各个高度风速和输沙量均显著低于流动沙丘,防风固沙效果明显。（2）小气候得到改善,小叶锦鸡儿林内空气温度低于流动沙丘,相对湿度则高于流动沙丘,土壤浅层温度变幅明显小于流动沙丘,有利于植物生长。（3）随着植被生长发育年限的增加,土壤理化性质均得到不同程度改善。土壤中微沙（0.05-0.1mm）和粘粒（〈0.05 mm）含量增加,表层土壤容重减小,孔隙度增大,土壤持水能力提高;土壤中有机碳、全氮、速效氮及速效钾含量逐年增加,土壤肥力有所提高。
The sand-fixing effects of 6 and 11-year-old Caragana microphylla plantation were studied, The results showed that： （1）The wind velocity and sand transporting rate in the plantation were less than in dunes. （2） The air temperature in the plantation was lower than in dunes, the relative humidity was higher, and the soil temperature was lower, beneficial to plant growth. （3） With increase in age, the physical and chemical characteristics of soil were improved to some extent. The porosity and percentage of tiny sand（0. 05-0.1 mm） and clay particle （〈0.05 mm） increased, bulk density in surface soil decreased, and saturated water-holding capacity improved. The content of organic C, total N, available N and available K increased gradually, and the soil fertility enhanced.
出处
《水土保持学报》
CSCD
北大核心
2007年第1期84-87,共4页
Journal of Soil and Water Conservation
基金
国家科技攻关项目"科尔沁沙地植被重建与调控技术研究与示范"(2005BA517A08)
国家科技攻关计划子课题"半干旱典型沙区水资源承载力与植被优化配置技术研究"(2005BA517A02-1)
辽宁省科学技术基金博士启动基金"人工固沙植被水分平衡与土壤水分植被承载力研究"(20051009)共同资助
关键词
科尔沁沙地
小叶锦鸡儿
固沙效应
输沙率
小气候
Keerqin sandy land
Caragana microphylla
sand-fixing effects
sand transported rate
microclimate
