Water conservation functions of several artificial forest ecosystems in semiarid region of western Liaoning Province

Abstract

Abstract: Five artificial forest ecosystems in semiarid region of western Liaoning Province were selected to test their water conservation capacity.The average interception rate of different artificial forest ecosystems varied from 14.58% to 37.19%,and the order was H.rhamnoides forest ecosystem> P.tabulaeformis-H.rhamnoides mixed forest ecosystem> P.simonii H.rhamnoides mixed forest ecosystem> P.tabulaeformis forest ecosystem> P.simonii forest ecosystem.The thickness of the litter layer in different forest ecosystems varied from 1.6 to 4.1 cm,and the biomass of the litter varied from 1 890.4 to 6 425.2 kg hm^-2.The order of the thickness and the biomass of the litter in different forest ecosystems was H.rhamnoides forest ecosystem> P.tabulaeformis H.rhamnoides mixed forest ecosystem> P.simonii H.rhamnoides mixed forest ecosystem> P.tabulaeformis forest ecosystem> P.simonii forest ecosystem.The maximum water holding capacity of the litter in different forest ecosystems varied form 5 957.7 to 1 9332.9 kg·hm^-2,and the order was H.rhamnoides forest ecosystem> P.tabulaeformis H.rhamnoides mixed forest ecosystem> P.simonii H.rhamnoides mixed forest ecosystem> P.tabulaeformis forest ecosystem> P.simonii forest ecosystem.The water holding capacity of non capillary porosity of 0～40 cm soil layer in different forest ecosystems varied from²3.70 to 37.85 mm,and the order was H.rhamnoides forest ecosystem> P.simonii H.rhamnoides mixed forest ecosystem> P.tabulaeformis H.rhamnoides mixed forest ecosystem> P.simonii forest ecosystem> P.tabulaeformis forest ecosystem.Among the five artificial forest ecosystems, H.rhamnoides forest ecosystem had the best water conservation capacity,and the mixed forest ecosystems had a better water conservation capacity than P.tabulaeformis and P.simonii forest ecosystem.

Key words: Semiarid region of western Liaoning Province, Artificial forest, Conservation of water resources, Canopy interception, Water holding of litter, Soil water conservation

CLC Number:

S718.56

LUO Yuechu, HAN Shanheng, WANG Hongchang, LIU Jianmin, WEI Jing, WU Gang . Water conservation functions of several artificial forest ecosystems in semiarid region of western Liaoning Province[J]. Chinese Journal of Applied Ecology, 2004, (6): 919-923.

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