摘要
对六盘山不同植被的地被物分布特征进行研究发现,华北落叶松、白桦和油松林下草本植物物种丰富。辽东栎林枯落物叶片宽厚肥大,分解后枯落物较为松软,厚度最大,枯落物总储量仅次于华北落叶松。不同森林植被枯落物中,针叶枯落物所占比例最大。未分解层储量/厚度比值小于半分解层,9月份针叶林枯落物储量/厚度比值最大。天然次生林辽东栎林植被结构复杂,尽管不断有枯落物补充,枯落物却能迅速破碎分解,一方面能够迅速补充土壤养分含量,另一方面能够在地表形成更为疏松的枯落物层,因此7—9月份辽东栎林枯落物变化较大。
The characteristics of forest floor in Liupan Mountain was studied. It was found that the herbage diversity in the forest of Larix principis--rupprechtii, Betula platyphylla, and Pinus tabulaeformis was abundant. Due to the fleshy leaves of Quercus Liaotungensis forest, litter layer was rather loose after litter was decomposed, so that litter depth was the greatest and litter biomass was lower than that in Larix princi- pis--rupprechtii forest. Furthermore, the leaf litter was the main configuration. Ratio of litter biomass to litter depth in undecomposed layer was greater than that in half-decomposed layer, while in September, the ratio in needle forest was the greatest. There was more complicated forest structure in Quercus Liaotungensis as litter can be supplied continuously but be decomposed rapidly. This supplied soil nutrients and at the same time, a looser litter layer formed in soil surface. The most evident change occurred in the litter of Quercus Liaotungensis forest.
出处
《水土保持通报》
CSCD
北大核心
2008年第4期60-65,共6页
Bulletin of Soil and Water Conservation
基金
中国科学院水土保持研究所知识创新领域前沿项目"黄土区林草植被恢复机理研究"(SW04103)
国家重点基础研究发展计划973课题(2007CB106803)
国家"十一五"科技支撑课题(2006BAD09B08)
国家自然科学基金重点课题(30230290)
国家林业局荒漠化监测专项
关键词
地被物
分布特征
枯落物
六盘山
forest floor
distributing characteristic
litter
Liupan Mountain
