Effects of Litter of Plant Communities Oil Soil Seed Bank in the Baihua Mountainous Area of West Beijing City

LIU Shang-hua; SHI Feng-ling; LV Shi-hai; FENG Chao-yang; GAO Ji-xi; LIN Dong

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Effects of Litter of Plant Communities Oil Soil Seed Bank in the Baihua Mountainous Area of West Beijing City

- Effects of Litter of Plant Communities Oil Soil Seed Bank in the Baihua Mountainous Area of West Beijing City
- Bulletin of Soiland Water Conservation Vol. 27, Issue 2, Pages: 41-47(2008)
- 作者机构：
  
  1. 内蒙古农业大学生态环境学院,内蒙古,呼和浩特,010019
  2. 中国环境科学研究院生态研究所,北京,100012
  3. 甘肃农业大学草业学院,甘肃,兰州,730070
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2008
- 稿件说明：
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LIU Shang-hua, SHI Feng-ling, LV Shi-hai, et al. Effects of Litter of Plant Communities Oil Soil Seed Bank in the Baihua Mountainous Area of West Beijing City[J]. Bulletin of Soiland Water Conservation, 2008, 27(2): 41-47.
DOI：

LIU Shang-hua, SHI Feng-ling, LV Shi-hai, et al. Effects of Litter of Plant Communities Oil Soil Seed Bank in the Baihua Mountainous Area of West Beijing City[J]. Bulletin of Soiland Water Conservation, 2008, 27(2): 41-47. DOI：

摘要

采用种子萌发法对京西百花山区9种植物群落(以草本和灌木植物种子为主)土壤种子库进行了研究。结果显示

不同植物群落土壤种子库储量为97～1224粒/m2

物种数目为9～24种

Simpson指数为0.74～0.93

Margalef指数为1.13～4.42

Shannon—Wiener指数为0.69～0.94。凋落物对土壤种子库的影响体现在两方面。(1)凋落物对土壤种子库的截留

截留率为30.8%～77.3%。通过线性相关分析得出

凋落物对土壤种子库的截留率与凋落物的厚度成正相关。(2)凋落物对土壤种子库萌发幼苗生长的影响(试验中采用种子出苗3个月内死亡率来衡量)。凋落物层较厚的森林群落中

凋落物层幼苗的死亡率高于土层

凋落物层中幼苗的死亡率为11.9%～20.3%

土层中幼苗的死亡率为4.8%～8.3%;而凋落物层较薄的灌木和草本群落中

凋落物层幼苗的死亡率低于土层

凋落物层中幼苗的死亡率为2.6%～4.4%

土层中幼苗的死亡率3.2%～5.1%。凋落物层中幼苗的死亡率与凋落物厚度成正相关。

Abstract

By seed germination monitoring

transient soil seed bank of nine communities in the Baihua mountainous area of West Beijing City are analyzed.Results showed that the storage capacity of soil seed bank of different vegetation communities ranked from 97 to 1 224 seeds/m2;the number of species

from 9 to 24;Simpson index

from 74 to 0.93;Margalef index

from 1.13 to 42;and Shannon—Wiener

from 0.69 to 94.Effects of litter on soil seed bank were shown in two aspects.First

litter could intercept soil seed bank and the interception rate was between 30.8% and 77.3%.Linear correlation analysis revealed that the interception rate had a positive correlation with litter thickness.Second

litter could affect seedling growth(the experiments used mortality of seedling in three months).In forest communities

mortality of seedling in litter layer(11.9%～20.3%) was higher than that in soil layer(3.2%～8.2%).In shrub and herb communities

mortality of seedling in litter layer(2.6%～4.4%) was lower than that in soil layer(3.2%～5.1%).This indicates a significant positive correlation between mortality of seedling in litter layer and litter thickness.

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