不同沙丘部位沙柳叶片含水量及与土壤水分关系的初步研究

对不同坡位沙柳叶片含水量以及沙柳当年生苗、未平茬苗和实生苗3种沙柳苗的叶片含水量进行测定,同时对土壤含水量与沙柳叶片含水量之间的相关关系进行分析。其结果表明:不同坡位叶片含水量表现为迎风坡>丘间低地>背风坡,其中迎风坡坡底叶片含水量最高为61.98%,而背风坡中部和坡底部叶片含水量的差异不显著;3种沙柳苗的叶片含水量从大到小的顺序为:当年生苗>未平茬苗>实生苗,与不同类型的沙柳苗的叶面积大小相一致;总体来看,在"柳湾林"内沙柳叶片含水量与表层土水分存在着一定的相关性。

Relationship between Leaf Water Content and Soil Water of Salix psammophila at Different part of Sand Dune

The leaf water content of Salix psammophila at different part of slope and the ones of three kinds of seedlings of Salix psammophila have been measured,and the relevant relationship between soil water content and leaf water content of Salix psammophila has been analyzed.The results show: the leaf water content at windward slope >the one at lowland among dunes >the one at leeward slope,which the leaf water content at the bottom of windward slope is the highest as 61.98%,and the difference between the leaf water content at middle of leeward slope and the one at bottom of leeward slope.The order of leaf water content of three kinds of seedlings of Salix psammophila is current seedling>perennial branch>seedling,which is consistent with the foliage area.To sum up,the leaf water content of Salix psammophila is interrelated with the water content of surface soil.