Characteristics of Crust Soil Seed Bank in Horqin Sandy Lan

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Characteristics of Crust Soil Seed Bank in Horqin Sandy Lan

更新时间：2024-11-07

- Characteristics of Crust Soil Seed Bank in Horqin Sandy Lan
- Issue 6, Pages: 187-191(2007)
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- Published：2007
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Characteristics of Crust Soil Seed Bank in Horqin Sandy Lan[J]. 2007, (6): 187-191.
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Characteristics of Crust Soil Seed Bank in Horqin Sandy Lan[J]. 2007, (6): 187-191. DOI：

摘要

通过野外取样和室内分析

初步研究了科尔沁沙地两种生物结皮在干、湿两种处理下土壤种子库种类组成、密度以及物种多样性等特征.结果表明①科尔沁沙地藻结皮和苔藓结皮土壤种子库的总密度为干旱藻结皮＜湿润藻结皮＜干旱苔藓结皮＜湿润苔藓结皮.两种结皮上种子库的数量存在显著差异

对于干、湿处理的两种结皮

苔藓结皮上种子库的总密度均大于藻结皮上种子库的总密度;②两种生物结皮在干旱、湿润两种处理中共出现了6科、15种植物

种子库的组成以一年生草本植物、中生植物为主

二者百分比均超过76%;③在干旱藻结皮、湿润藻结皮、干旱苔藓结皮和湿润苔藓结皮上

种子库物种多样性表现出湿润处理下的结皮高于干旱处理的结皮.由此表明

在半干旱的科尔沁沙地

水分是限制结皮土壤种子库中种子萌发的主要因子

而生物结皮则通过对水分入渗与再分配的调控作用影响结皮种子库中种子的萌发.

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