亚高山草甸不同坡位冷箭竹生境特征及对生长的影响  

Habitat Characteristics and Effects on Growth of Arundinaria faberi in Different Slope Positions of Subalpine Meadow

作　　者：颜科宇 陈平平 李建兴 张丽梅 刘辉 陈正发 YAN Keyu;CHEN Pingping;LI Jianxing;ZHANG Limei;LIU Hui;CHEN Zhengfa(College of Water Conservancy,Yunnan Agricultural University,Kunming 650201,China;Kunming Engineering Corporation Limited of Powerchina,Kunming 650051,China;Datang Yunnan New Energy Co.,Ltd,Kunming 655200,China)

机构地区：[1]云南农业大学水利学院,昆明650201 [2]中国电建集团昆明勘测设计研究院有限公司,昆明650051 [3]大唐云南新能源有限公司,昆明655200

出　　处：《林业资源管理》2023年第2期70-78,共9页Forest Resources Management

基　　金：云南省基础研究专项面上项目(202201AT070272);中国电建集团昆明勘测设计研究院有限公司科技项目(H20220308)。

摘　　要：冷箭竹作为低纬度高原亚高山草甸的优势植物种,明确不同坡位冷箭竹生境特征及关键生长影响因子对其群落保护具有重要的指导意义。以云南寻甸高本山区亚高山草甸冷箭竹为研究对象,通过调查不同坡位冷箭竹生长及生境因子特征,采用相关性热图辨识冷箭竹关键生长影响因子。结果表明:1)空气温度和相对湿度随坡位上升呈降低趋势,风速和太阳辐射强度随坡位上升呈升高趋势。2)不同坡位土壤颗粒组成均以粉粒为主,土壤容重随坡位上升呈升高趋势,土壤含水率、大团聚体含量和土壤化学指标均随坡位上升呈先升高后降低趋势;草甸土壤呈明显的酸性特征,中坡位土壤理化特性反映出土壤质量水平相对更高。3)随着坡位上升,冷箭竹形态和群落特征均呈现出显著的劣化趋势。4)相关性热图分析表明,空气温度、太阳辐射强度、风速、土壤容重和有效磷对冷箭竹相应生长特征影响较大,其中空气温度、太阳辐射强度、风速和土壤容重是影响冷箭竹生长的关键性因子。As a dominant plant species in subalpine meadows on the low-latitude plateau,it is of great guiding significance to clarify the habitat characteristics and key growth factors of different slope positions of Arundinaria faberi for its community protection.The research object was Arundinaria faberi in the subalpine meadow of Gaoben Mountain in Xundian,Yunnan.By investigating the characteristics of growth and habitat factors of Arundinaria faberi in different slope positions,the key growth factors of Arundinaria faberi were identified by correlation heat map.The results showed that:1)The air temperature and relative humidity tended to decrease with the increase of the slope position,while the wind speed and solar radiation intensity increased with the increase of the slope position.2)The soil particle composition of different slope positions was mainly composed of silt particles.The soil bulk density increased with the increase of the slope position.The soil moisture content,large aggregate content and soil chemical indicators all increased first and then decreased with the increase of the slope position.The meadow soil was obviously acidic,and the soil quality level reflected by the physical and chemical characteristics of the middle slope soil was relatively higher.3)With the increase of the slope position,the morphology and community characteristics of Arundinaria faberi showed a significant deterioration trend.4)Correlation heat map analysis showed that air temperature,solar radiation intensity,wind speed,soil bulk density and available phosphorus had a great influence on the corresponding growth characteristics of Arundinaria faberi among which air temperature,solar radiation intensity,wind speed and soil bulk density were the most influential key factor for growth.

关 键 词：亚高山草甸 冷箭竹 坡位 环境因子 生长影响 

分 类 号：S718.53[农业科学—林学] S795.2