太行山前南峪旅游区3种典型林分枯落物持水特性的研究  

Study on Water Holding Capacity of Forest Litters of Three Typical Types in Qiannanyu Tourism Zone of Taihang Mountain

作　　者：徐学华[1] 张慧[2] 王海东[3] 张丽玮[1] 李玉灵[1] 王超华[1] 

机构地区：[1]河北农业大学林学院,河北省林木种质资源与森林保护重点实验室,河北保定071000 [2]河北农业大学城乡建设学院,河北保定071001 [3]河北省木兰围场国有林场管理局,河北围场068450

出　　处：《水土保持学报》2013年第6期108-112,共5页Journal of Soil and Water Conservation

基　　金：河北省科技计划项目(11236713D-X);河北省科技计划项目(12237510);河北省科技计划项目(13236809D-2)

摘　　要：为了阐明太行山前南峪旅游区油松林、刺槐林和栓皮栎-刺槐林林下枯落物的持水规律,对其枯落物蓄积量、持水量、吸水速率和有效拦蓄量等进行研究。结果表明:①各林分枯落物蓄积量油松林(32.12t/hm2)>栓皮栎-刺槐林(12.39t/hm2)>刺槐林(7.14t/hm2);②枯落物的最大持水量油松林(28.41t/hm2)>栓皮栎-刺槐林(25.73t/hm2)>刺槐林(18.16t/hm2),但在每种林分中半分解层枯落物的最大持水量都大于未分解层。最大持水率刺槐林(253.81%)>栓皮栎-刺槐林(204.56%)>油松林(129.40%);③在浸泡的前0.25h内,未分解层和半分解层枯落物的持水量增速及吸水速率最大,然后逐渐减弱,最后趋于一致;24h后枯落物的持水量达到最大,而此时吸水速率几乎为零;枯落物的持水量及吸水速率与浸泡时间的关系依次为:Q=aln(t)+b和V=ktn;④枯落物有效拦蓄量栓皮栎-刺槐林(19.75t/hm2)>刺槐林(14.25t/hm2)>油松林(5.12t/hm2)。In order to clarify the law of water holding capacity of forest litters of Pinus tabulaeformis forest, Robinia pseudoacacia forest and Quercus variabilis-Robinia pseudoacacia forest in Qiannanyu tourism zone, the litter preservation, water holding capacity, water absorption rate and modified interception amount were studied. The result showed that： @The litter amount in different forests followed the sequence of Pinus tabulaeformis forest （32.12 t/hm2） ~Quercus variabilis-Robinia pseudoacacia forest （12.39 t/hm2） 〉Rob- inia pseudoacacia forest （7.14 t/hm2）. @The maximum water holding capacity of litter in different forests was in the order of Pinus tabulaeformis forest （28. 4l t/hm2） ~Quercus variabilis-Robinia pseudoacacia forest （25.73 t/hm2） 〉Robinia pseudoacacia forest （18.16 t/hm2）, but in each stand semi-decomposed lay- er of the maximum water holding capacity was bigger than that in un-decomposed layer. The order of the maximum rate of water retention was Robinia pseudoacacia forest （253.81%） 〉Quercus variabilis Robinia pseudoacacia forest （204.56%） 〉Pinus tabulaeformis forest （129. 40%）. @The increase speed of water holding capacity and the water absorption rate of litter in un-decomposed and semi-decomposed layer reached the fastest in the front 0.25 hours then gradually decreased,finally tended to be uniform. After 24 hours, the water holding capacity of litter reached the maximum, white the water absorption rate approached to 0. The relationships between water holding capacity and water absorption rate of litter and soaking time were Q=aln （t） -t-b and V=kt. @The modified interception amount in different forests followed the sequence of Quercus variabilis-Robinia pseudoacacia forest （19.75 t/hm2） 〉Robinia pseudoacacia forest （14.25 t/hm2） 〉Pinus tabulaeformis forest （5.12 t/hm2）.

关 键 词：前南峪旅游区 枯落物 蓄积量 持水量 吸水速率 

分 类 号：S715.7[农业科学—林学]