| 民勤绿洲外围不同立地类型黑果枸杞种群分布格局 |
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| 引用本文： | 马俊梅,郭春秀,何芳兰,金红喜,赵鹏,满多清,张锦春.民勤绿洲外围不同立地类型黑果枸杞种群分布格局[J].干旱区研究,2019,36(1):122-130. |
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| 作者姓名： | 马俊梅 郭春秀 何芳兰 金红喜 赵鹏 满多清 张锦春 |
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| 作者单位： | 甘肃省荒漠化与风沙灾害防治国家重点实验室,甘肃武威733000;甘肃省治沙研究所,甘肃兰州730000;甘肃省治沙研究所,甘肃兰州,730000 |
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| 基金项目： | 国家自然科学基金;国家自然科学基金;甘肃省重点研发项目;林业科技推广项目;甘肃省项目 |
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| 摘 要： | 通过测定石羊河下游民勤绿洲外围4个不同立地类型黑果枸杞群落植被特征和黑果枸杞株数、株高、冠幅等生物学特征,以及黑果枸杞分布格局的点坐标,采用空间点格局分析方法中的Ripley’s K函数,分析了民勤绿洲外围不同立地类型上黑果枸杞空间分布格局。结果表明:(1)4个不同立地类型中植被物种数为:砾石地﹥盐碱地﹥固定或半固定沙丘地、覆沙地,植物群落结构比较简单,存在多个科单属单种现象。(2)黑果枸杞株数在盐碱地中最多,覆沙地次之,固定或半固定沙丘地和砾石地中最少;而平均株高由高到低依次是固定或半固定沙丘地、盐碱地、覆沙地、砾石地;平均冠幅分布与平均株高类似。(3)在4个样地中,固定或半固定沙丘地和砾石地中的黑果枸杞呈现聚集分布;覆沙地中,黑果枸杞在较小尺度(0.2~0.5 m)呈现聚集分布,在较大尺度(1.5~2.5 m)呈现随机分布;盐碱地中,黑果枸杞种群表现为完全的随机分布。
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| 关 键 词： | 立地类型 黑果枸杞 群落特征 分布格局 Ripley’s K函数 民勤绿洲 |
Spatial Distribution Pattern of Lycium ruthenicum in Different Site Types in Periphery of the Minqin Oasis |
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| MA Jun-mei,GUO Chun-xiu,HE Fang-lan,JIN Hong-xi,ZHAO Peng,MAN Duo-qing,ZHANG Jin-chun.Spatial Distribution Pattern of Lycium ruthenicum in Different Site Types in Periphery of the Minqin Oasis[J].Arid Zone Research,2019,36(1):122-130. |
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| Authors: | MA Jun-mei GUO Chun-xiu HE Fang-lan JIN Hong-xi ZHAO Peng MAN Duo-qing ZHANG Jin-chun |
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| Institution: | (State Key Laboratory of Desertification and Aeolian Sand Disaster Combating, Wuuei 1330001 Gansu,China;Gansu Provincial Institute of Desert Control Research Lanzhou 130000, Gansu,China) |
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| Abstract: | The purposes of this study were to investigate the community characteristics and biological characteristics of Lycium ruthenicum in different site types in periphery of the Minqin Oasis.The biological characteristics of L.ruthenicum community included the plant number,height,canopy and distribution pattern in four different site types,and the Ripley’s K function in the spatial point pattern analysis method was used to analyze the spatial distribution pattern of L.ruthenicum.The results are as follows:(1)Number of plant species in the four site types was in an order of gravel land>saline and alkaline land>fixed or semi-fixed desert and sandy land.Structure of the plant community was relatively simple;(2)Number of L.ruthenicum plants was the most in the saline and alkaline land,then in the sandy land,and that in the gravel land and fixed or semi-fixed desert were the least.The average plant height was in an order of the fixed or semi-fixed desert>saline and alkaline land>sandy and gravel land,and the distribution of average canopy was similar to that of average plant height;(3)In the four plots,L.ruthenicum plants were distributed in a clustering way in the fixed or semi-fixed desert and gravel land;in the sandy desert,however,they were distributed in a clustering way on a small scale(0.2-0.5 m)but in a random way on a larger scale(1.5-2.5 m);in saline and alkaline land,they were distributed in a completely random way. |
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| Keywords: | site type Lycium ruthenicum community distribution pattern Ripley's K function Minqin Oasis |
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