文献类型：期刊文献

中文题名：青海共和盆地不同林龄乌柳林的水分利用策略

英文题名：Water Use Strategy of Salix cheilophila Stands with Different Ages in Gonghe Basin,Qinghai Province

作者：刘丽颖[1] 贾志清[1] 朱雅娟[1] 李虹[2] 杨德福[3] 魏登贤[3] 赵雪彬[3]

第一作者：刘丽颖

机构：[1]中国林业科学研究院荒漠化研究所,青海共和荒漠生态系统定位观测研究站;[2]中国林业科学研究院林业研究所;[3]青海省治沙试验站

年份：2012

卷号：25

期号：5

起止页码：597-603

中文期刊名：林业科学研究

外文期刊名：Forest Research

收录：CSTPCD;;Scopus;北大核心:【北大核心2011】；CSCD:【CSCD2011_2012】；

基金：林业公益性行业科研专项经费项目"高寒沙地防护林生态服务功能研究"(201204203);中国林业科学研究院林业研究所重点项目"优良沙生植物抗逆性及其栽培技术试验研究"(ZD200908);科技部农业科技成果转化项目(2011GB24320002)

语种：中文

中文关键词：水分来源;水分利用效率;稳定氢同位素比率;稳定氧同位素比率;稳定碳同位素比率

外文关键词：water source; water use efficiency; δD; δ18O; δ13C

分类号：S718.5

摘要：利用稳定同位素技术,测定共和盆地不同林龄(5、9、25 a)乌柳枝条木质部和土壤各层水分的δD值、δ18O值,分析它们是否随林龄变化而选择性地利用不同深度的土壤水分,并通过测定不同林龄乌柳叶片的δ13C值,分析比较它们的长期水分利用效率。结果表明:5 a乌柳主要利用源自降雨的10～50 cm深处的浅层土壤水分,9 a乌柳主要利用降雨补充的20 cm和地下水补充的30～50、150 cm深处的土壤水分,25 a乌柳主要利用降雨补充的10～20cm和地下水补充的50 cm深处的土壤水分。3个林龄乌柳的水分利用效率差异显著,5 a乌柳的水分利用效率明显高于9 a和25 a乌柳,9 a和25 a乌柳水分利用效率类似。水分利用策略的分析结果表明:9～25 a乌柳处于稳定时期。
Salix cheilophila is one of the main shrub species for afforestation in Alpine Sandland of Gonghe Basin,Qinghai Province.Stable isotope technique was used to test the δD and δ18O value of rain,well water,branch xylem and different soil depth of 5-,9-and 25-year-old S.cheilophila plantation,and then the differences of main water source among the three S.cheilophila stands with different ages were analyzed.Also,the δ13C value of leaves was tested to evaluate the water use efficiency（WUE） of the S.cheilophila stands.Comparison of δD and δ18O showed that 5-year-old S.cheilophila used the water in 10-50 cm soil infiltrated from rainwater;9-year-old S.cheilophila consumed relatively deep soil water,including 20 cm infiltrated from rainwater and 30-50,150 cm replenished by ground water;and 25-year-old S.cheilophila used 10-20 cm soil water infiltrated from rainwater and 50 cm soil water replenished by ground water.The difference of leaf δ13C value among 5-,9-and 25-year-old S.cheilophila stands was significant;5-year-old S.cheilophila has exclusively high WUE,whereas that of 9-year-old and 25-year-old stands were similar.The water source and WUE suggest that 9-25 years old S.cheilophila was in steady period.