Title: Vegetation succession and soil moisture control of abandoned sandy ploughed-lands in lower reaches of Shiyang River
Abstract: The studies which provided the important basis for vegetation management,transformation and rehabilitation on vegetation succession,especially process and mechanism of natural rehabilitation and vegetation reconstruction in destroyed ecosystems had important significance in theory and in practice.Succession and soil moisture change of abandoned sandy ploughed lands in lower reaches of shiyang river were studied based on important value and similarity coefficient.The results showed that the communities of abandoned sandy ploughed lands rehabilitated from the community of Peganum nigellastrum+ Phragmites communis+Lactuca tatarica to the community of Peganum nigellastrum+ Messerschmidia + Karelinia caspica,and lastly to the community of Peganum nigellastrum+Sophora japonica+Limonium aureum.Soil moisture was important influence factor for vegetation succession of sandy abandoned ploughed lands,the intractable weeds in farmland were pioneer plants with the influence of the soil moisture from prophase irrigation,the intractable weeds were substituted by the drought enduring plants with the soil moisture reducing gradually,and lastly substituted by the strong drought enduring plants which depended on savageness rainfall,the community was stable.Perennial herbages were principal part of vegetation succession,the species Peganum nigellastrum was dominant plant among process of vegetation succession,the law of vegetation succession was showed by the change of sub-dominant species,but annual herbages were not pioneer plants of vegetation succession because which were influenced by the rainfall and its distributive pattern,the annual herbages should abundantly present on the every phase of vegetation rehabilitation if the rainfall was richness.
Publication Year: 2011
Publication Date: 2011-01-01
Language: en
Type: article
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