Research And Analysis Of Liana And Herb Plants Leaf Functional Traits Of Evergreen Broad-leaved Forest In Daming Mountain Of Guangxi

Plant’s growth cannot leave the environment, on the one hand, environmental changes of plant properties have a significant impact, on the other hand, the plant traits to adaptive changes of the environment and transform function. Therefore, under the background of global climate change, the study of plant functional traits become one of hot topics in the study of ecology, received wide attention of scholarsIn this thesis, our select30kinds liana and20kinds herb plants of daming mountain nature reserve of guangxi, leaf siza (LS), leaf fresh weight (LFW), leaf thickness (LT), chlorophyll (SPAD), leaf dry weight (LDW), specific leaf area (SLA), leaf dry matter content content (LDMC), leaf nitrogen(LN), leaf kalium(LK), leaf phosphorus (LP), leaf nitrogen and phosphorus ratio (N:P) was chosen。 The main resluts are as follows:1, This study found that both liana and herb, different functional traits change range is different.The variation coefficient of leaf area, and leaf fresh weight are relatively large than other leaf functional traits; matter content, the chlorophyll and leaf nitrogen and phosphorus are change narrow than other leaf functional traits. leaf fresh weight and leaf dry weight, leaf siza of plant resource competition between the response is sensitive, the three indicators can be used to study the intensity of the competition between daming mountain evergreen broad-leaved forest plants.2, This study found that plant leaf nitrogen, phosphorus content is generally low; Most liana had been influened by the N or PorN:P, about30%of the species is limited by N elements, and is limited by P element plants are relatively less.75%of daming mountain evergreen broad-leaved forest herb had been influened by N or PorN:P, about20%of the species is limited by N elements, and the herb limited by P element are very few.3,Liana and herb than leaf area and suggested material content, leaf thickness was significantly negative relationship between specific leaf area and leaf nitrogen content was significantly positive correlation; Last is based on the nutrient elements, vine and herb in the middle of nitrogen and phosphorus content has a significant positive correlation, and leaf and leaf nitrogen, phosphorus potassium content relations were not significant.4, In this article,4kinds of liana plants and4species of herb plants leaf functional traits presented some regularity with slope positions change, in the presence of differences in factor, leaf fresh weight and leaf dry weight with the tendency of increase with the rising slope positions are presented; Specific leaf siza increased with slope positions all present decreasing trend; Leaf thickness increased with slope positions all showed a trend of increase; And leaf nitrogen, phosphorus and potassium content in the leaves vary with position differences between individual plants.5, In this article,4kinds of liana plants and4species of herb plants leaf functional traits of forest gap disturbance presented some regularity, undergrowth window leaf area were significantly larger than the woods; Forests chlorophyll content were large window of the forests; leaf dry matter content are characterized by forest gap conditions than forests; Leaf nitrogen, phosphorus and kalium content were not significant difference.6, Through cluster analysis divided of30species of liana into three functional groups.(1) large leaf area, small specific leaf area and low nutrient content types;(2) the small leaf area, specific leaf area and the nutrient content of medium type;(3) the type of leaf area of medium and high nutrient content.20species of herbaceous plants can be divided into three functional groups, namely,(1) large leaf area, small specific leaf area and low nutrient content types;(2) the small leaf area, specific leaf area and high nutrient content type;(3) leaf area the type of medium.7, Through qualitative fujimoto of woody liana, grass, and herb leaf functional traits between the morphological characteristics, physical characteristics and chemical characteristics, the study found the grass liana and leaf functional traits were not significant difference between the herb, features leaf functional traits in plants, grass liana characteristics tend to herb, show the convergence.