西鄂尔多斯不同灌丛类型地上生物量与土壤理化性质研究  

Study on aboveground biomass and soil physicochemical properties of different shrub types in Western Ordos

作　　者：姜亚东 郭威星 秦玉英 赵利龙 王玉婕 郭威艳 Jiang Yadong;Guo Weixing;Qin Yuying;Zhao Lilong;Wang Yujie;Guo Weiyan(Inner Mongolia Autonomous Region Geological Survey Institute,Hohhot Inner Mongolia 010018,China;Ulanqab Agricultural and Forestry Science Research Institute,Ulanqab Inner Mongolia 012000,China;Ulanqab Agricultural and Livestock Product Quality Safety Center,Ulanqab Inner Mongolia 012000,China)

机构地区：[1]内蒙古自治区地质调查研究院,内蒙古呼和浩特010018 [2]乌兰察布市农林科学研究所,内蒙古乌兰察布012000 [3]乌兰察布市农畜产品质量安全中心,内蒙古乌兰察布012000

出　　处：《环境与发展》2023年第3期38-47,共10页Environment & Development

基　　金：国家科技部基础资源调查专项(2017FY100204)资助。

摘　　要：为明晰不同灌丛类型地上生物量与土壤理化性质的关系,本文选取了西鄂尔多斯21个植被与土壤调查点,筛选出7类主要的灌丛类型作为研究对象,利用样方收获法对灌丛地上生物量进行研究,分析其与土壤理化性质的关系。结果表明:西鄂尔多斯灌丛地上生物量介于9.55~1105.46 g·m^(-2)之间,平均值为162.48 g·m^(-2);不同行政区域灌丛地上生物量大小顺序为盐池县>鄂托克前旗>灵武市>鄂托克旗>同心县>永宁县>青铜峡市>平罗县>惠农县;此趋势与各区域降水量的变化趋势基本一致,大致表现为鄂尔多斯西缘和宁夏中部地区高,宁夏北部地区低的分布特征。不同灌丛类型地上生物量介于33.72~648.10 g·m^(-2),平均为156.97 g·m^(-2);乌柳(Salix cheilophila)灌丛的地上生物量最大,达到648.10±96.78 g·m^(-2),刺叶柄棘豆(Oxytropis aciphylla)灌丛的地上生物量最小,为33.72±7.65 g·m^(-2);地上生物量最高的灌丛群落结构是乌柳+黑沙蒿(Art⁃cemisia ordosica),最低的是刺叶柄棘豆+灌木亚菊(Ajania fruticulosa);株丛数对灌丛地上生物量的影响并不明显,而盖度与灌丛地上生物量的关系更加紧密,他们具有相似的变化趋势。灌丛地上生物量与土壤含水率的相关关系极显著,与土壤有机质、全氮和总磷的相关关系显著,而与土壤pH值和土壤容重之间的相关关系不显著。容重和pH对第一和第二主成分的贡献很小,总磷对第一主成分的贡献最高,土壤含水量对第一主成分的贡献最低;土壤含水量、地上生物量、总磷、有机质和全氮是决定灌丛群落特征的主要因子。本研究有助于西鄂尔多斯荒漠灌丛草地群落生产力估测,并为当地退化草地的生态修复和植物资源的合理开发利用提供了理论依据。Abstract:In order to clarify the relationship between aboveground biomass and soil physical and chemical properties of different shrub types,this paper selected 21 vegetation and soil survey sites in Western Ordos,selected 7 main shrub types as the research object,and used the quadrat harvest method to study the aboveground biomass of shrubs,analyzing the relationship between it and soil physical and chemical properties.The results showed that the aboveground biomass of the shrub in West Ordos ranged from 9.55 to 1105.46 g·m^(-2),with an average value of 162.48 g·m^(-2);The order of aboveground biomass of shrubs in different administrative regions is Yanchi County>Etuoke Front Banner>Lingwu City>Etuoke Banner>Tongxin County>Yongning County>Qingtongxia City>Pingluo County>Huinong County;This trend is basically consistent with the variation trend of precipitation in various regions,which is generally characterized by a high distribution in the western margin of Ordos and the central region of Ningxia,while a low distribution in the northern region of Ningxia.The aboveground biomass of different shrub types ranged from 33.72 to 648.10 g·m^(-2),with an average of 156.97 g·m^(-2);The aboveground biomass of Salix cheilophila shrub is the largest,reaching 648.10±96.78 g·m^(-2),while that of Oxytropis apichylla shrub is the smallest,reaching 33.72±7.65 g·m^(-2);The shrub community structure with the highest aboveground biomass is Salix negundo+Artemisia ordosica,and the lowest is Oxytropis spinifera+Ajania fruticulosa shrub;The effect of the number of plants on the aboveground biomass of shrubs is not significant,while the relationship between coverage and aboveground biomass of shrubs is closer,and they have a similar trend of change.The correlation between aboveground biomass of shrubs and soil water content was extremely significant,while the correlation between aboveground biomass and soil organic matter,total nitrogen,and total phosphorus was significant,while the correlation between aboveground biomass and

关 键 词：西鄂尔多斯 灌丛 地上生物量 土壤理化性质 

分 类 号：Q948[生物学—植物学]