河北省太行山区3种人工水土保持林枯落物及土壤水文效应
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国家林业公益性行业科研专项“太行山干旱退化山地旱涝灾害生态调控技术研究”(201504408)


Water-holding Capacity of Litter and Soil in Three Kinds of Soil and Water Conservation Forests in Taihang Mountains of Hebei Province
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    摘要:

    [目的] 揭示人工水土保持林林下枯落物以及土壤持水特征,为太行山区水土保持林的建造和规划提供理论依据。[方法] 运用烘干法,室内浸泡法,环刀法等得出不同林分林下枯落物蓄积量、持水量、吸水速率、最大持水能力和拦蓄量,比较了不同林分枯落物和土壤的持水能力。[结果] 枯落物总储量范围为9.96~19.19 t/hm2,表现为栓皮栎林总储量最大,荒坡总储量最小。枯落物最大持水量变化范围为23.76~66.72 t/hm2,栓皮栎—侧柏混交林最大,荒坡最小。栓皮栎—侧柏混交林有效拦蓄量可达51.50 t/hm2,在各林分中最大;荒坡有效拦蓄量为19.55 t/hm2,在各林分中最小。枯落物持水量、吸水速率均与浸泡时间呈相关关系,前者为对数关系(R> 0.97),后者为幂函数关系(R> 0.98)。各林分土壤容重均值介于1.14~1.55 g/cm3,总孔隙度介于38.62%~43.76%。各林分土壤有效持水量表现为:刺槐林> 栓皮栎—侧柏混交林> 栓皮栎林> 荒坡,其中刺槐林最大(为106.85 t/hm2),荒坡最小(为89.37 t/hm2)。[结论] 水土保持林持水能力远大于荒坡。

    Abstract:

    [Objective] The objective of this study is to investigate the water-holding capacity of litter and soil and to provide support for planning and planting soil and water conservation forests in Taihang Mountains. [Methods] Drying method, indoor soaking and cutting ring method were used to determine the water holding capacity by litter and soil in different kinds of forest stands. [Results] The total storage by litter ranged from 9.96 t/hm2 to 19.19 t/hm2. The maximum water-holding volume of different forests was about 23.76 t/hm2 to 66.72 t/hm2, the order was Quercus variabilis and Platycladus orientalis mixed forest >Q. variabilis forest >Robinia pseudoacacia forest> controlled forestland. The maximum effective retaining water of litter occured in Q. variabilis and P. orientalis mixed forest while the minimum in controlled forestland. The water-holding capacity of litters and immersion time had visible logarithmic relationship(R>0.97), whereas the litter absorption rate and immersion time followed an exponential relationship(R>0.98). Soil bulk desity was about 1.14 g/cm3 to 1.55 g/cm3, the total porosity ranged from 38.62% to 43.76%. The order of effective water-holding capacity of soil in these forests was R. pseudoacacia forest>Q. variabilis and P. orientalis mixed forest>Q. variabilis forest>controlled forestland( maximum in R. pseudoacacia 106.85 t/hm2, while minimum in controlled forest land 89.37 t/hm2). [Conclusion] The water holding capacity of forest lands was much better than controlled forestland.

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庞梦丽,朱辰光,翟博超,屈宇.河北省太行山区3种人工水土保持林枯落物及土壤水文效应[J].水土保持通报,2017,37(1):51-56

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  • 收稿日期:2016-06-21
  • 最后修改日期:2016-06-27
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  • 在线发布日期: 2017-03-23
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