辽宁省森林枯落物现存量及其持水性能

发布时间：2018-06-03 21:37

本文选题：枯落物 + 持水能力　；参考：《应用基础与工程科学学报》2017年04期

【摘要】：枯落物层是森林涵养水源功能的第二作用层,在森林水文功能中发挥着重要的作用.采用野外调查与室内分析相结合的方法,对辽宁省主要森林类型的枯落物现存量、厚度、分解现状、最大持水率、拦蓄量以及吸水速率进行研究.结果表明:不同森林类型的枯落物现存量介于8.53~37.51t/hm~2,平均现存量为16.92t/hm~2;枯落物厚度介于2.3~6.6cm,平均厚度为4.0cm.不同森林类型枯落物最大持水量变化范围为16.57~66.69t/hm~2,大小顺序为云冷杉落叶松针叶混交林桦木林其它针叶类红松其它阔叶类阔叶混交林针阔混交林栎类樟子松杨树油松.各森林类型枯落物未分解层的最大持水率为127.87%~225.59%,半分解层的最大持水率为182.22%~233.50%.各森林类型枯落物的有效拦蓄量为11.76~32.03t/hm~2,且针叶林枯落物平均有效拦蓄量(23.52t/hm~2)明显大于阔叶林(15.51t/hm~2).回归分析表明,枯落物持水量与浸水时间符合关系式y=aln x+b,吸水速率与浸水时间符合关系式S=axb.
[Abstract]:Litter layer is the second layer of forest water conservation function and plays an important role in forest hydrological function. Using the method of field investigation and indoor analysis, the present situation of litter, thickness, decomposition, maximum water holding capacity, impounding capacity and water absorption rate of main forest types in Liaoning Province were studied. The results showed that the standing stock of litter in different forest types ranged from 8.53 to 37.51t / hmc-2, the average standing stock was 16.92t / hmm-2, and the thickness of litter was between 2.3cm and 6.6cm, with an average thickness of 4.0cm. The maximum water holding capacity of litter in different forest types was 16.57 ~ 66.69 t / hm ~ (-2), and the order of variation was in the order of spruce and larch mixed forest, birch forest, other coniferous Korean pine broad-leaved mixed forest, Quercus mongolica broad-leaved mixed forest, Quercus sylvestris poplar and Pinus tabulaeformis. The maximum water holdup of undecomposed litter layer of each forest type was 127.870.225.59 and that of semi-decomposable layer was 182.220.233.50. The effective interception of litter in different forest types was 11.76 ~ 32.03 t / hm ~ (-2), and the average effective interception of litter in coniferous forest was 23.52 t / hm ~ (-2), which was significantly higher than that in broad-leaved forest (15.51 t 路hm ~ (-2) 路hm ~ (-2). The regression analysis showed that the water holding capacity of litter and the soaking time were in accordance with the formula y=aln x b, and the water absorption rate and the soaking time were in accordance with the relationship between the water absorption rate and the soaking time.
【作者单位】：北京林业大学林学院;山东农业大学资源与环境学院;辽宁省林业科学研究院;
【基金】：科技基础性工作专项(2014FY120700) 辽宁省林业科学研究院科技合作项目(2014HXFWLXY023)
【分类号】：S714

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