间伐对黄龙山辽东栎林下枯落物持水性的影响
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陕西省科技创新统筹项目“陕西珍贵用材树种质资源培育关键技术研究”(20150210169);国家“十二五”科技支撑计划项目(2012BAD22B030204)


Effects of Thinning on Litter's Water Holding Capacity of Quercus Wutaishanica Forest Understory in Huanglong Mountain
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    [目的] 对黄龙山林区辽东栎林抚育间伐与对照设置试验样地,研究其林下枯落物持水效应特征,为该地区森林抚育提供理论依据。[方法] 采用重度(间伐35%)、中度(间伐25%)、轻度(间伐15%)抚育间伐,通过典型取样法、烘干法、浸泡法等开展研究。[结果] 枯落物总储量大小依次表现为:CK(23.500±0.780) > 轻度(22.950±1.012) > 中度(22.708±0.365) > 重度(20.725±1.041),只有CK与重度有显著性;枯落物总持水量大小依次表现为:轻度(9.37) > CK(8.29) > 中度(7.61) > 重度(6.39),轻度间伐下枯落物总有效拦蓄量最大;枯落物持水量与浸泡时间呈对数函数变化,R2均在0.93以上,具有显著相关性;枯落物吸水速率与浸泡时间呈幂函数变化,R2均在0.99以上,具有显著相关性。[结论] 综合比较不同间伐强度下枯落物持水性,轻度间伐下枯落物持水性较好,可为黄土高原地区森林抚育提供理论依据。

    Abstract:

    [Objective] The effects of thinning on the water holding features of forests understory litter were studied to provide theoretical basis for local regional forest tending.[Methods] The experimental had thinning treatments of heavy thinning(thinning 35%), medium thinning(thinning 25%), light thinning(thinning 15%) and the control(no thinning) in Quercus wutaishanica forest of Huanglong Mountain in Loess Plateau. Typical sampling method, drying method and soaking method were used to measure water holding traits.[Results] Total litter volumes ranked as:CK(23.500±0.780) > light thinning(22.950±1.012) > medium thinning(22.708±0.365) > heavy thinning(20.725±1.041). Only the difference between CK and heavy thinning was significant; The total water holding capacities ranked as:light thinning(9.37) > CK(8.29) > medium thinning(7.61) > heavy thinning(6.39); the total effective retain capacity of light thinning is maximum. The litter water holding capacity presented a significant logarithmic function with soaking time as independent variable and the R2 was above 0.93. Meanwhile, water absorption rate had a significant power function with soaking time, their R2 was above 0.99.[Conclusion] Water holding capacity of light thinning performed the best. This is theoretically important for regional forest tending.

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曹旭平,于世川,张文辉,刘舒宇.间伐对黄龙山辽东栎林下枯落物持水性的影响[J].水土保持通报,2016,36(6):247-251,257

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  • 收稿日期:2016-04-25
  • 最后修改日期:2016-05-11
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  • 在线发布日期: 2017-01-13
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