子午岭人工油松林土壤种子库特征研究  

Characteristics of Soil Seed Bank of Pinus Tabulaeformis Plantation in Ziwuling Mountains

作　　者：熊楚翘[1] 程积民[1,2] 万惠娥[1,2] 

机构地区：[1]西北农林科技大学动物科技学院,陕西杨凌712100 [2]中国科学院水利部水土保持研究所,陕西杨凌712100

出　　处：《水土保持通报》2009年第4期42-45,共4页Bulletin of Soil and Water Conservation

基　　金：国家重点基础研究发展(973)计划(2007CB106803);国家科技支撑计划重大项目(2006BAD09B08;2006BAD16B06;2006BAD09B03);国家自然科学基金重点项目(40730631);国家林业局荒漠化监测专项

摘　　要：采用野外调查取样和室内观测试验相结合的方法,研究了子午岭人工油松林土壤种子库的物种组成、密度、垂直分布等特征。结果表明:(1)土壤种子库储量密度平均为5711粒/m2,最大密度是9537粒/m2,最小密度是3563粒/m2。(2)土壤种子库的种子的垂直分布主要集中在0—2.5cm,2.5—5cm和5—7.5cm这3个层次,占75.38%～79.32%,枯枝落叶层和7.5—10cm层分布较少,占20.68%～24.62%。(3)土壤种子库物种组成主要为灌木和草本两个种类,无乔木植物,多年生草本在物种数和种子数上占据明显优势。Field survey and laboratory observation experiment were conducted to study the character of soil seed bank for Pinus Tabulaeforrnis Plantation in Ziwuling Mountains, such as species composition, density, and the vertical distribution of species. Results indicated that （1） the average seed storage of seed banks was 5 711 grains/m2 and the minimum and the maximum storage were 3 563 grains/m2 and 9 537 grains/m2 , re- spectively. （2） Vertical distribution of the soil seed bank mainly concentrated in the three levels of 0--2.5, 2.5--5, and 5--7.5 cm, accounting for 75.38%-79.32%, and for the forest flooring and the 7.5-10 cm level, the distribution accounted for 20.68%--24.62%. （3） Species composition of the soil seed bank for the two types of shrubs and herbaceous, non-tree plant, the perennial herb occupies the obvious superiority in the species number and the seed number.

关 键 词：人工油松林 土壤种子库 储量 分布 植被组成 

分 类 号：Q948.1[生物学—植物学]