间伐对黄龙山辽东栎林下枯落物持水性的影响  

Effects of Thinning on Litter's Water Holding Capacity of Quercus Wutaishanica Forest Understory in Huanglong Mountain

作　　者：曹旭平 于世川[2] 张文辉[2] 刘舒宇[2] 

机构地区：[1]陕西省延安桥山林业局,陕西黄陵727300 [2]西北农林科技大学陕西省林业综合实验室,陕西杨凌712100

出　　处：《水土保持通报》2016年第6期247-251,257,共6页Bulletin of Soil and Water Conservation

基　　金：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)

摘　　要：[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。[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.

关 键 词：枯落物 持水性 辽东栎 间伐 

分 类 号：S715.3[农业科学—林学] S715.7