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OALib Journal期刊
ISSN: 2333-9721
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甘肃兴隆山主要森林类型凋落物及土壤层的蓄水功能
DOI: 10.3969/j.issn.1000-2006.2013.02.014, PP. 78-84
Keywords: 森林类型,凋落物,土壤,水源涵养功能,甘肃兴隆山
Abstract:
以甘肃兴隆山青？林、青？-白桦林、山杨-白桦林、灌丛林、落叶松林和油松林6种森林类型林下凋落物层和土壤层为研究对象,于2010年进行了不同森林类型蓄水功能的研究。结果表明:(1)凋落物累积量13.40～46.32t/hm2,油松林是山杨-白桦林的2.71倍;凋落物最大持水量为39.38～85.91t/hm2,油松林最大,山杨-白桦林最小;(2)土壤密度随土壤深度的加大而增大,毛管孔隙度、总孔隙度、饱和蓄水量、非毛管蓄水量均随土壤深度的加大而减小;6种森林0～60cm土壤层非毛管蓄水量为413.38～771.71t/hm2,青？-白桦林最大,落叶松林最小;(3)6种森林类型总蓄水量为青？-白桦林(849.76t/hm2)>青？林(778.48t/hm2)>山杨-白桦林(623.24t/hm2)>油松林(504.80t/hm2)>落叶松林(492.02t/hm2)>灌丛林(462.26t/hm2),青？-白桦林是灌丛林的1.84倍。因此,天然林随森林的正向演替其蓄水功能先增加后减少。
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