LI Shu-jun,LI Guo-qi,WANG Lei,et al.A Coupling Relationship Research on Soil Seed Bank of Different Age Artificial Forests（Caragana microphylla）in Desert Steppe[J].Northern Horticulture,2014,38(18):181-185.
不同水分梯度对激发土壤种子库的效应研究
- Title:
- A Coupling Relationship Research on Soil Seed Bank of Different Age Artificial Forests（Caragana microphylla）in Desert Steppe
- 文章编号:
- 1001-0009（2014）18-0181-05
- Keywords:
- desert steppe; water; soil seed bank
- 分类号:
- Q 945.78
- 文献标志码:
- A
- 摘要:
- 采用水分控制试验，对干旱、半干旱退化荒漠草原治理过程中，土壤种子库对不同日降雨量和不同年降雨量的响应分别进行了研究。结果表明：不同日降雨量对激发土壤种子库物种组成和种子萌发总数均存在显著差异；不同植物种子对自身种子萌发所需水分不同。有的植物仅需很少水分即可萌发，有的植物需要很多的水分才可萌发，还有的植物种子可萌发范围较广；不同年降雨量对激发研究区内土壤种子库物种组成差异不显著，而对激发土壤种子库内可萌发种子数则成波动式的变化。为治理退化荒漠草原、恢复地上植被，建议研究区采用交替施加不同梯度的水分来激发土壤种子库中的种子萌发。
- Abstract:
- The response of soil seed bank under different daily rainfall and annual rainfall were studied by water control experiment in the processing of arid and semi-arid desert grassland degradation.The results showed that there were significant differences between species composition of the soil seed bank and seed germination under different day rainfall.Seed germination of its own seeds of different plants required different moisture.Some plants could germinate only with a little water;some plants need a lot of water before germination，as well as the wide range of plant seeds could germinate.The effect of different annual rainfall on soil seed bank to stimulate the composition of species in the study area was not significant，while stimulate seed germination of seeds in soil with a fluctuation in the number of type changes.Therefore，for the treatment of degraded desert steppe vegetation restoration on the ground，the proposed study area should consider using different gradients of water applied alternately to stimulate seed bank in the soil seed germination.
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备注/Memo
第一作者简介：李淑君（1987-），女，硕士研究生，研究方向为植物生态学。E-mail：lishujun174@126.com.
责任作者：李国旗（1965），男，博士，教授，硕士生导师，研究方向为植物生态学。E-mail：guoqilee@163.com.
基金项目：国家科技支撑计划资助项目（2011BAC07B03）。
收稿日期：2014-05-22