沙地黄柳生物量分配和组织含水量的关系

为了解决生长在不同生境中的黄柳（Salix gordejevii）对防沙治沙工程的作用问题，采用在不同生境内取样的方法，测定黄柳的叶片和木质茎生物量比例及含水量，总结出黄柳的地上生物量分配和组织含水量的关系以及黄柳的生长格局。试验结果表明：叶片与木质茎生物量比及绝对含水量比均从顶端至基部逐渐减少，叶片生物量和水分主要局限于植株顶部40cm以内。然而，就整个枝条而言，干生物量分配和组织水分比例均以生长在背风坡底部的黄柳差异最大。沙地生境间黄柳地上生物量和体内水分差异，对了解黄柳沙生适应性和有效地利用植物资源进行沙区环境保护和固沙作用提供理论依据。

Relationship between biomass allocation and tissue water content in salix gordejevii

solve the problem of the effect of Salix gordejevii growing in different environment on the project of sand prevention and control,the foliage/wood biomass ratio and absolute water content ratio is measured by using sampling method and the growth pattern of S.gordejevii and the relationship for aboveground biomass and tissue water content are summarized.The results indicate that both the foliage/wood biomass ratio and absolute water content ratio are decreased from the tip to the base gradually.Foliage biomass and water are mainly limited to the top 40 cm of the crown.Leaves have higher relative water contents than woody tissues in upper part of the crown.However,in terms of the whole branch,the most difference of aboveground biomass allocation and tissue water content ratio is presented to S.gordejevii growing at the bottom of lee wave.The relative water content is found to be mostly allocated to the woody structures.Study of growth patterns of S.gordejevii in different environment discloses the different between biomass and water content,which provides theoretical basis for protecting the plant resources in sand regions.