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[1]YU Yanghua,LI Guangrong,PI Fajian,et al.Water Holding Capacities of Leaves and Branches in the Upper Reaches of Chishui River[J].Research of Soil and Water Conservation,2016,23(02):171-176.

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Water Holding Capacities of Leaves and Branches in the Upper Reaches of Chishui River

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 23 Number of periods: 2016 02 Page number: 171-176 Column: Public date: 2016-04-28

Title:: Water Holding Capacities of Leaves and Branches in the Upper Reaches of Chishui River

Author(s):: YU Yanghua^1,2, LI Guangrong¹, PI Fajian³, YAN Lingbin¹, YU Lifei³, HUANG Zongsheng¹; 1. College of Forestry, Guizhou University, Guiyang 550025, China;
2. Renhuai Environmental Protection Agency, Renhuai, Guizhou 564500, China;
3. College of Life Science, Guizhou University, Guiyang 550025, China

Keywords:: leaves; branches; water holding; water loss; functional group; upper reaches of Chishui River

CLC:: S715.7

DOI:: -

Abstract:: Taking the 32 plants in the upper reaches of Chishui River as the examples of the research, we measured the water-holding capacity of the leaves and branches by using absorption method and natural loss method. The results showed that the maximum water-holding ratio of leaves ranged from 0.33 to 1.59, the water holding capacity of leaf surface coat was relatively strong. The maximum water-holding ratio was lower than the natural water-holding ratio, which means that the water-holding capacity of unit mass of branches was lower than the leaves. The water-holding ratio of leaves and branches was higher than the water loss ratio, and the relationship between water holding ratio, water loss ratio and the time can be described by power function model. We can deduce the relationship between water-holding ratio of the leaves and the time based on the maximum water-holding ratio, but we cannot deduce the relationship between the water loss ratio and the time. Leaf texture, roughness, villous, the maximum water holding ratio, water retention curves of constant items were the key factors on water holding capacity. The 32 plants in this area can be divided into 4 types of holding functional groups such as the low water holding, medium-low water holding, medium water holding and high water holding using RDA ordination. The research can make the contribution to the species selection of conservation forests and the forest structure configuration in the upper reaches of Chishui River.

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