摘要
依据水量平衡原理,分析不同密度、不同树龄人工小叶锦鸡儿固沙植被区土壤水分及蒸散量变化特点。结果表明:人工固沙小叶锦鸡儿林地土壤水分状况随着树龄增大和栽植密度的加大而不断恶化,流动沙丘和天然植被区土壤水分状况优于人工植被区;蒸散量与同期降水量之间存在显著正相关。1m×1m密度4年生植被区和2m×2m密度成龄植被区土壤含水量高于凋萎湿度,生长末期土壤贮水量有较多节余,土壤水分能够满足植物生长需求,建议小叶锦鸡儿固沙林幼年期采用1m×1m密植,其后通过间伐,成龄期保持2m×2m密度,为科尔沁沙地人工固沙植被建设提供科学依据。
According to water balance theory, we study the soil moisture content and the evapotranspiration of Caragana microphylla plantation in different ages and density to ascertain the suitable configuration of the artificial Caragana microphylla sand-fixation plantation in west Horqin Sandland. The result shows that the Soil moisture content is continually decreasing along with the increase of the ages and the density of the artificial sand-fixed vegetation. The soil moisture content of the artificial Caragana microphylla sand-fixed vegetation is less than that of the floating dune and the savage vegetation. There is remarkable positive correlativity between evapotranspiration and rainfall. The soil moisture content of 4 years old with 1 m × 1 m density and 19 years old with 2 m × 2 m density plantation is above wilting humidity, the soil moisture storage has surplus in the end of growth phases, and the soil moisture content can meet the needs of the plantation growth. We suggest that keeping 1 m × 1 m density in infancy time and 2 m × 2 m density in autumn by thinning techniques while establishing Caragana microphylla sand-fixation forest.
出处
《水科学进展》
EI
CAS
CSCD
北大核心
2005年第3期426-431,共6页
Advances in Water Science
基金
国家"十五"重点科技攻关重大资助项目(FS2001 01)
中国科学院沈阳应用生态研究创新重大课题资助项目(SCXZDO101 02)~~
关键词
科尔沁沙地
人工固沙林地
土壤水分
蒸散量
适宜度
Horqin sandy land
artificial caragana microphylla sand-fixation forest
soil moisture content
evapotranspiration
suitability
