科尔沁草地植物种质资源的数量特征

发布时间：2018-04-10 18:49

本文选题：生物多样性 + 植物种重要值　；参考：《生态学杂志》2017年10期

【摘要】：以通辽地区科尔沁草地为研究对象,采用样地调查探析该地区草地植物种质资源数量特征。结果表明:通辽地区科尔沁草地的植物种类组成十分丰富和复杂,共有42科,163属,276种,其中优良牧草种类占35.15%;可将草地类型划分为5大类、7个亚类、17个草地组,其中以羊草(Leymus chinensis)为建群种的群落占主要优势,分布最为广泛;因此,本文深入研究了羊草群落的生物量与物种多样性、地理分布的关系,即羊草群落随着物种多样性的增加,群落地上生物量明显增加,呈正相关关系;同时,羊草群落的地上生物量也受到地理因子变化的影响,地上生物量随着经度升高而增加,随着纬度升高而降低。本研究对增加该地区优质牧草产量、改良退化草地、发展草原畜牧业提供了重要的科学数据,对于更好恢复和管理该地区重要的草地资源以及地区经济发展具有重要意义。
[Abstract]:Taking Horqin grassland in Tongliao area as the research object, the quantitative characteristics of grassland plant germplasm resources in Tongliao area were analyzed by sample investigation.The results showed that the species composition of Horqin grassland in Tongliao area was very rich and complex, with 276 species belonging to 163 genera and 42 families, among which the fine forage species accounted for 35.155.The grassland types could be divided into 5 categories, 7 subclasses and 17 grassland groups.Among them, Leymus chinensis was the dominant species and most widely distributed. Therefore, the relationship between the biomass of Leymus chinensis community and species diversity and geographical distribution was studied in this paper, that is, the Leymus chinensis community increased with the increase of species diversity.At the same time, the aboveground biomass of Leymus chinensis community was also affected by geographical factors. The aboveground biomass increased with the increase of longitude and decreased with the increase of latitude.This study provides important scientific data for increasing the yield of high quality forage grass, improving degraded grassland and developing grassland animal husbandry. It is of great significance for better restoration and management of important grassland resources and regional economic development in this area.
【作者单位】：中国科学院森林生态与管理重点实验室中国科学院沈阳应用生态研究所;中国科学院大学;
【基金】：国家科技基础性工作专项“东北草地植物资源专项调查”(2014FY210300)资助
【分类号】：S812

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