辽西低山丘陵区针叶林与阔叶林枯落物持水性对比

发布时间：2018-06-28 11:36

本文选题：持水性 + 针叶林　；参考：《中国水土保持科学》2017年04期

【摘要】：为对比分析辽西低山丘陵区针叶林与阔叶林枯落物的持水性差异,为辽西森林植被恢复提供科学依据和技术支撑,选取3个针叶林(红松林、油松林、兴安落叶松林)和3个阔叶林(榆树林、山杨林、紫椴林)下的枯落物作为研究对象,采用野外现场采样与室内浸水相结合的方法对枯落物的持水特性进行测定。结果表明:针叶林平均蓄积量大于阔叶林,其中针叶林蓄积量在14.65~17.75 t/hm~2,阔叶林在8.44~16.92 t/hm~2;针叶林枯落物平均厚度(2.79 cm)大于阔叶林(2.44 cm);针叶林最大持水率在148.88%~173.19%,阔叶林在145.42%~156.91%;针叶林有效拦蓄水量为19.47~25.59 t/hm~2,阔叶林有效拦蓄水量为10.56~22.04 t/hm~2,表现为针叶林下枯落物的拦蓄能力更强;针叶林半分解层拦蓄水量显著大于未分解层,阔叶林未分解层拦蓄水量大于半分解层;阔叶林未分解层吸水速率大于针叶林。
[Abstract]:In order to compare and analyze the difference of water holding capacity between coniferous forest and broad-leaved forest in the hilly region of western Liaoning, and to provide scientific basis and technical support for forest vegetation restoration in western Liaoning, three coniferous forests (Pinus koraiensis, Pinus tabulaeformis) were selected. The litter in three broad-leaved forests (elm forest, Yang Lin forest, Tilia amurensis forest) was used as the research object. The water holding capacity of litter was determined by the combination of field sampling and indoor soaking. The results showed that the average storage capacity of coniferous forest was larger than that of broad-leaved forest. The average litter thickness of coniferous forest (2.79cm) was greater than that of broadleaved forest (2.44 cm);) (148.88 ~ 173.19) and broadleaved forest was 156.91t / hm ~ (-1); the effective water retention of coniferous forest was 19.477.59 t / hm ~ (2), and that of broad-leaved forest was 19.4725.59 t / hm ~ (-2), and the average litter thickness of coniferous forest was 14.65 ~ 17.75 t / hm ~ (-2) and 8.44 ~ 16.92 t / hm ~ (-2) t 路hm ~ (-2), respectively. The average litter thickness of coniferous forest (2.79 cm) was higher than that of broadleaf forest (148.88 ~ 173.19). The amount of water is 10.56 ~ 22.04 t / hm ~ (-2), which shows that the litter under coniferous forest has more ability to block and store litter. The water retention rate of the undecomposed layer was higher than that of the undecomposed layer, and that of the broad-leaved forest was larger than that of the semi-decomposed layer, and the water absorption rate of the undecomposed layer was higher than that of the coniferous forest.
【作者单位】：辽宁工程技术大学环境科学与工程学院;
【基金】：国家自然科学基金”干旱胁迫下科尔沁沙地主要防护林树种CNP化学计量特征及其影响机制”(31400613)
【分类号】：S714

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