Accumulation Amount of Litters and Their Water-holding Characteristics Under Main Forest Types in Longmen Mountains Fault Zone
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    Abstract:

    By field investigation in combination of indoor control and leaching, a study was conducted on the accumulation amount, water-holding capacity, water-holding rate and water-absorption rate of the litters under four main forests(evergreen broad-leaved forest, broadleaved deciduous forest, conifer-broadleaf forest and evergreen coniferous forest) in the Longmen Mountains fault zone. The accumulation amount of litters under the forests decreased in the order of evergreen coniferous forest(8.26 t/hm2) > broadleaved deciduous forest(6.80 t/hm2) > conifer-broad leaf forest(5.52 t/hm2) > evergreen broad-leaved forest(4.61 t/hm2), and the storage percentage of semi-decomposed litters was higher than that of un-decomposed litters. The water-holding capacity and water-holding rate of litters at different decomposition degree changed logarithmically, while the water-absorption rate assumed a power function of soaking time. Under the four main forests, the litters in semi-decomposed layer had a stronger water-holding capability than that in decomposed layer, and the water-holding capability of litters under broadleaved deciduous forest and conifer-broadleaf forest was stronger than the others, while the litters of evergreen broad-leaved forest had the lowest water-holding capability. The results indicated that we should fully exert the functions of soil and water conservation of the semi-decomposed litters, and select broadleaved deciduous forest and conifer-broadleaf forest needle modes in recovering and reconstructing forest vegetation.

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杨玉莲,马兴艳,吴庆贵,张川,刘涛,刘群,赵春霖.龙门山断裂带主要森林类型凋落物累积量及其持水特性[J].水土保持通报英文版,2014,(3):69-74

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History
  • Received:July 17,2013
  • Revised:July 29,2013
  • Adopted:
  • Online: March 29,2016
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