放牧后羊草和芦苇叶组织转化的比较

摘要/Abstract

摘要： 运用组织转化理论与分析方法,对羊草与芦苇在放牧后的叶组织转化进行了比较研究.结果表明,整个生长季内,除5月份外,芦苇的绿叶数大于羊草,羊草的绿叶长大于芦苇;2种禾草的叶片发生率和伸长率均在生长初期最大,以后逐渐降低,萎蔫率正好相反;芦苇叶片寿命短,叶组织转化快,叶组织物质积累呈抛物线型增长,如果不及时利用,会造成资源的浪费,羊草叶片寿命较长,叶组织转化慢.可以通过不同的利用方式和时间来改善羊草草地的质量.

关键词: 放牧, 羊草, 芦苇, 叶组织转化, 比较, 水生植物, 河岸带植物, 典范对应分析(CCA), 环境因子, 大型底栖动物, 群落特征

Abstract: Leaf tissue turnover of Leymus chinensis and Phragmites communis after grazing was studied by application of theory and method of tissue turnover in this paper. The results showed that the number of living leaf of P. communis was larger than that of L.chinensis, but the length of living leaf of L. chinensis was larger than that of P. communis during the whole growth period. Both of the leaf appearance rate and the leaf elongation rate of L. chinensis and P. communis were largest at first, and then they decreased gradually. The rate of leaf wither and leaf senescence were in the converse trend. The leaf lifespan of P. communis was shorter than that of L.chinensis. The velocity of leaf tissue turnover of P. communis was faster than that of L. chinensis. There would be a great loss if the leaf tissue of L. chinensis were not used in time. The quality of grasslands could be improved by different utilization ways and periods.

Key words: Grazing, Leymus chinensis, Phragmites communis, Leaf tissue turnover, Comparison, community characteristics, environmental factors, riparian zone plants, macrobenthos, CCA., aquatic macrophytes

中图分类号:

Q948
Q142

刘颖, 王德利, 王旭, 巴雷, 孙伟. 放牧后羊草和芦苇叶组织转化的比较[J]. 应用生态学报, 2002, (5): 573-576.

LIU Ying, WANG Deli, WANG Xu, BA Lei, SUN Wei . Comparison of leaf tissue turnover for Leymus chinensis and Phragmites communis after grazing[J]. Chinese Journal of Applied Ecology, 2002, (5): 573-576.

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