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[1]WANG Yihao,ZHOU Jiangang,WANG Yanhui.Production and Decomposition and Water-holding Capacity of Litter in Pinus massoniana Forests in the Tieshanping of Chongqing[J].Research of Soil and Water Conservation,2021,28(06):98-104.

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Production and Decomposition and Water-holding Capacity of Litter in Pinus massoniana Forests in the Tieshanping of Chongqing

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 28 Number of periods: 2021 06 Page number: 98-104 Column: Public date: 2021-10-10

Title:: Production and Decomposition and Water-holding Capacity of Litter in Pinus massoniana Forests in the Tieshanping of Chongqing

Author(s):: WANG Yihao¹，ZHOU Jiangang²，WANG Yanhui³; (1.Chongqing Field Science Observation and Research Station for Surface Ecological Process of Three Gorges Reservoir Area，College of Geography and Tourism，Chongqing Normal University，Chongqing 401331，China; 2.Zhangyuan Forest Farm of Qinxian County，Qinxian，Shanxi 046400，China; 3.Key Laboratory of Forest Ecology and Environment，National Forestry and Grassland Administration，Institute of Forest Ecology，Environment and Protection，Chinese Academy of Forestry，Beijing 100091，China)

Keywords:: litter; component; decomposition; water holding capacity; Pinus massoniana forest

CLC:: S715.3; S718.5

DOI:: -

Abstract:: To reveal litter accumulation amount of Pinus massoniana forests and its eco-hydrological effects in the Three Gorges Reservoir area，production，decomposition and water-holding capacity of litter in Pinus massoniana forests were studied by using the method of fixed observation and measurement of laboratory. The results showed that:(1)the monthly litter amount of Pinus massoniana forests ranged from 11.54 g/m² to 90.31 g/m²; except broad leaves，the monthly variation of total litter and its components presented a two-peak pattern; the yearly amount of litter components decreased in the order: dead needles>debris>twigs>broad leaves>bark and cones>green needles;(2)the litter accumulation amount of Pinus massoniana forests was 1 204 g/m²，and the undecomposed litter layer，the half-decomposed litter layer and the undecomposed litter mixed with half decomposed litter layer accounted for 29.98%，31.56% and 38.46% of litter accumulation amount，respectively;(3)the annual mass loss ratio of litter of Pinus massoniana forests was 35.62%，and the monthly mass loss ratio ranged from 1.04% to 6.75%; the mass remaining percentage for the decomposing litter of Pinus massoniana forests was significantly negative correlated with decomposition time(p<0.01);(4)the effective interception water depths of the undecomposed litter layer，the half-decomposed litter layer and the undecomposed litter mixed with half decomposed litter layer were 0.50 mm，0.59 mm and 1.12 mm，respectively; variations of water holding rates of different types of litter all presented an inverted J-shaped feature over the immersed time，and variations of water absorption rates of different types of litter all presented a J-shaped feature over the immersed time. In summary，productions of litter components，accumulation amounts of litter layers and their water-holding capacities of Pinus massoniana forests were all different. These results can provide the scientific basis for accurately evaluating water conservation service function of Pinus massoniana forest in the Three Gorges Reservoir area.

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Last Update: 2021-10-10