扎龙自然保护区羊草种群分蘖株的数量性状

Study on Quantity Characteristic of Leymus chinensis Population Tillering Plants in Zhalong Natural Reserve

[目的]为了研究扎龙自然保护区羊草种群分蘖株的数量性状。[方法]以扎龙羊草种群为研究对象,以年龄结构为切入点,对不同土壤生境条件下羊草分蘖株的数量性状进行了研究。[结果]在5-9月的取样中,扎龙保护区4种生境的羊草种群分蘖株平均数量表现为沙土〉林间风沙土〉草甸土〉中度碱土,年龄结构最多由3个龄级组成,其中均以1龄和2龄级分蘖株占绝对优势,3龄级所占比例甚小,呈增长型年龄结构;不同生境分蘖株的生物量也表现为沙土〉林间风沙土〉草甸土〉中度碱土,年龄组成均以1龄和2龄级分蘖株对种群物质生产的贡献大,3龄级所占比重很小,也呈增长型年龄结构。[结论]该研究为湿地的管理、开发利用提供了理论基础和理论指导。

[Objective] The aim of the research is to study quantity characteristic of Leyrnus chinensis population fillering plants in Zhalong natural reserve. [Method] With Leymus chinensis population as research object and the age structure as cut-in point, the quantity characteristics of Leymus chinensis tillering plants growing in different soil habitat conditions were studied. [Result] During the sampling course （from May to September）, the average quantity exhibitions of Leymus chinensis population tillering plants growing in 4 kinds of soil habitats in Zhalong natural reserve were as follow： sand soil 〉 wind-sand soil in woods 〉 meadow soil 〉 moderate alkali soil.The age structure was consisted of 3 age classes at most, and the tillering plants of I age class and 2 age class had absolute advantage and 3 age class took very little proportion, showing the growing age structure. The biomass of tillering plants growing in different soil habitats were also as follow： sand soil 〉 wind-sand soil in woods 〉 meadow soil 〉 moderate alkali soil. In age structure the tillering plants of 1 age class and 2 age class had more contribution to the population production and 3 age class took very little proportion, also showing the growing age structure. [Conclusion] The study supplied theoretical basis and guidance for management, development and utilization of marsh.