补播天然草地不同年限群落特征分析

Analysis on Community Characteristics of Reseeding Natural Grassland in Different Years

【目的】分析补播天然草地不同年限的群落特征。【方法】通过连续三年对巴里坤县2019年天然草地补播项目进行观测研究,【结果】补播草地第三年,植物抵御不良环境影响的能力增强,能够顺利完成年内生育周期;群落在垂直结构上形成了强大的郁闭结构,不仅能充分吸收光热资源,而且土壤水分散失减少,抵御干旱胁迫的能力不断增强;通过激烈的种间竞争,补播草地群落种间结构相对合理,且群落结构日趋稳定。【结论】科学的补播方式有助于增加天然草地优良牧草物种数、提高产草量、丰富物种多样性,更有利于天然草地的正向演替。

【Objective】Through the observational research on the 2019 natural grassland replanting project in Barikun County for three consecutive years.【Methods】In the third year after replanting the grassland,the ability of plants to resist adverse environmental impacts during the growth process is enhanced,so that they can successfully Complete the plant growth cycle.【Results】The community has formed a strong canopy structure in the vertical structure,which can not only fully absorb light and heat resources,but also reduce soil water loss,and the ability to resist drought stress is continuously enhanced;through fierce interspecific competition,the interspecific structure of the reseeding grassland community is relatively reasonable,and the community structure of the reseeding grassland is becoming more and more stable.【Conclusion】The scientific reseeding method can help to increase the natural grassland excellent forage varieties,improve the grass yield,and enrich the species diversity,which is more conducive to natural grassland.Positive succession of grassland.