摘要
研究了不同土壤水分处理对霸王、沙冬青、长叶红砂及蒙古扁桃这4种荒漠植物种子萌发和幼苗生长的影响。结果表明,土壤含水量显著地影响着种子萌发和幼苗生长。霸王种子在6%的土壤含水量下萌发率和萌发指数最高,活力指数和幼苗生物量也最大,幼苗生长良好。沙冬青种子在12%的土壤含水量、长叶红砂和蒙古扁桃种子在16%的土壤含水量下萌发和生长良好。种子萌发策略反映了物种对荒漠水分条件不同的适应机制,并影响种群的更新和扩展。
Responses of seed germination of 4 desert vegetation species﹝Zygophyllum xanthoxylum Bunge.,Ammopiptanthus mongolicus（Maxim.）Cheng f.,Reaumuria trigyna Maxim,and Amygealus mongolica Maxim﹞to soil moisture were studied.Results showed that soil moisture had a significant effect on the seed germination and seedling growth.At 6% soil moisture content,germination rate and germination index of Z.xanthoxylum seeds reached peak value,vigor index and seeding biomass were the greatest,and seedlings of Z.xanthoxylum grew well.Germination and growth of A.mongolicus seeds behaved very well at 12% soil moisture content and those of R.trigyna and P.mongolica seeds behaved also well at 16% soil moisture content.The seed germination strategy of the 4 plants reflects different adaptation mechanisms to desert moisture condition and affects population regeneration and expansion.
出处
《水土保持通报》
CSCD
北大核心
2010年第6期60-63,共4页
Bulletin of Soil and Water Conservation
基金
内蒙古自治区自然科学基金项目"西部荒漠灌木种子萌发对策及生态适应研究"(2009BS0508)
内蒙古师范大学科研基金项目(ZRYB08020)
关键词
土壤水分
荒漠植物
种子萌发
幼苗生长
soil moisture
desert species
seed germination
seedling growth
