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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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高寒山地甘肃臭草斑块特征与土壤水分的关系
DOI: 10.3724/SP.J.1145.2012.00571, PP. 571-574
Keywords: 甘肃臭草,土壤水分,斑块,pearson相关性,石羊河上游,高寒退化山地
Abstract:
选取石羊河上游高寒退化草地甘肃臭草种群，分析斑块特征、土壤水分以及二者之间的相互关系，以期了解植被对土壤水分变化的适应性和反作用特征.结果表明：甘肃臭草斑块在形成、扩散和稳定阶段种群高度、密度、盖度由中心向边缘逐渐减小，衰退阶段由中心向边缘逐渐增大，甘肃臭草斑块内土壤水分由中心向边缘逐渐增大，斑块内土壤水分大于斑块外；斑块内土壤水分与植被主要生物学特征之间由负相关向正相关过渡.甘肃臭草具有明显的可塑性，通过对干旱区环境的长期适应，改变了小范围内土壤水分分布结构，进而形成繁茂生长的单一优势种群斑块.表3参16
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