In order to explore the relationship between plants functional traits and precipitation gradient,the plant species from seven natural Pinus tabulaeformis forests indifferent locations (Liaoning, Beijing, inner Mongolia, Shanxi, Shaanxi and Qinghai) are gathered and their leaf dry matter content (LDMC), speciifc leaf area (SLA), leaf nitrogen concentration (LNC), leaf phosphorus concentration (LPN) and chlorophyll content (CHC) were set as the indictors and measured.The main results were as follows:(1) At a certain precipitation gradient (an average annual rainfall less than 2000 mm),SLA can be the typical leaf functional traitreflecting colony differences between regions, and there is obvious linear relationship between SLA and average annual precipitation;(2) Precipitation changehas a signiifcant impact onleaf functional traits of plants, the leaf functional traits of plants of different life forms have different response degree and change trend with the precipitation change, and there are different response ways to precipitation gradient between different leaf functional traits; (3) At a certain precipitation gradient, there are differences between intraspecific and interspecific changes of leaf functional traits in all aspects except LDMC, indicating that there are no signiifcant connection betweenintraspeciifc and interspeciifc changes of one leaf functional trait, intraspeciifc and interspeciifc changes of leaf functional traits are related to the studied species and traits.%为了探究植物叶功能性状与降水量之间的关系，选取7个不同地点（辽宁、内蒙、北京、山西、陕西、青海）天然油松林内的主要植物叶片，选取叶干物质含量（leaf dry matter content, LDMC）、比叶面积（speciifc leaf area, SLA）、叶N含量（leaf nitrogen concentration, LNC）、叶P含量（leaf phosphorus concentration, LPN）、叶绿素含量（chlorophyll content，CHC）5项指标进行测定。结果表明：（1）在降水梯度下（年平均降水量小于2000 mm），SLA可以作为体现地区间油松群落差异的叶功能性状，并且与年平均降水量之间存在明显的线性关系；（2）降水量的变化对植物的叶功能性状会产生显著的影响，其中不同生活型植物的叶功能性状对降水变化的响应程度与变化趋势不同，并且不同叶功能性状对降水梯度的响应方式不同；（3）在降水的梯度下，叶功能性状的种内变化与种间变化趋势除LDMC外都存在差异，表明同一叶功能性状其在种内变化趋势与在种间变化趋势之间没有显著联系，叶功能性状的种内变化与种间变化趋势与研究物种和研究性状有关。
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