Water Holding Characteristics of Litters of Different Species in Mountainous Area of Napahai Plateau Wetland
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LU Lei1,2,ZHAO Zhen-yong1,QIAO Mu1,ZHANG Ke1,ZHOU Sheng-bin1,TANG Jin1,3 (1.Xinjiang Institute of Ecology and Geography,China Academy of Sciences,Urumqi,Xinjiang 830011,China,2.Graduate University of the Chinese Academy of Sciences,Beijing 100049,3.Xinjiang Agricultural University,Xinjiang 830052,China)

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S718.3

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    Abstract:

    The water holding capacity was characterized for the litters from eight plantation types in the mountainous area of Napahai Plateau Wetland. The results show that,for all the eight plantation types,the semi-decomposed and decomposed layer had higher litter storage and water reserv-ing capacity than the freshly-littered layer.The litter storage decreased from highwood,shrub to waste grassland.Specifically,the litter storages of naturalPicea asperataMast,mixed forest ofPinus densataMast andRhododendron simsiiPlanch,mixed forest of Salix cupularisRehd andBetula platyphyllaSuk,Crataegus pinnatifidaBge and waste grassland demonstrated a capacity of 36.60, 30.67,26.63,25.61 and 5.30t/hm2,respectively. Comparatively,mixed forest ofSalix cupularisRehd andBetula platyphylla Suk had the highest water holding capacity,and seriously human-disturbedPinus densataMast had the lowest.The water holding capacity of the litters increased rapidly during the initial first hour,and then slightly increased after 6~10 hour saturation.The highest water absorp-tion rates were observed in the first 30minute saturation time,and thereafter the rates decreased substantially.Water loss rates were similar for all the litters,showing a linear decreas-ing trend.Systematic analysis indicated that the litter of mixed forest ofSalix cupularis Rehd andBetula platyphyllaSuk had the highest water holding capacity,the strongest flood-adjusting capacity,the most ideal water loss process and the highest water supply capacity,and the best hydro-ecological effect among the eight plantation types.

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陆梅,田昆,赖建东,赵一鹤,魏江舟.高原湿地纳帕海周边山地不同植被类型枯落物持水特性[J].水土保持通报英文版,2011,(1):27-34,52

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History
  • Received:October 09,2010
  • Revised:November 27,2010
  • Adopted:
  • Online: October 25,2012
  • Published: