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民勤沙拐枣克隆种群构件结构及与环境因子的灰色关联分析 被引量:9
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作者 周资行 焦健 +2 位作者 李毅 李永兵 张世虎 《林业科学》 EI CAS CSCD 北大核心 2012年第5期141-149,共9页
引入"构件"一词来表述植物体的不同组分,并在此基础上将其进一步发展为种群构件理论,极大地推动了植物种群生态学的发展(Bazzaz et al.,1978;Halle et al.,1978;Harper,1977;1980;钟章成,1992)。对木本植物而言,其地上部分枝或茎的... 引入"构件"一词来表述植物体的不同组分,并在此基础上将其进一步发展为种群构件理论,极大地推动了植物种群生态学的发展(Bazzaz et al.,1978;Halle et al.,1978;Harper,1977;1980;钟章成,1992)。对木本植物而言,其地上部分枝或茎的顶端分生组织和侧生分生组织通过不断重复的、持续的活动产生新的分枝,构成了复杂的枝系构件和多样的外部形态特征。克隆种群对环境因子的反应首先表现在种群个体的构件结构上,对克隆植物构件的统计研究可涉及个体(基株)、分株和枝系3个水平(董鸣,1997), 展开更多
关键词 沙拐枣克隆种群 构件结构 环境因子 灰色关联分析 民勤沙地
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Temperature Regulation Effect of Desert Vegetation in Minqin Desert Area
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作者 Chang Zhaofeng Zhang Xiaojuan +3 位作者 Wang Qi Zhang Dekui Duan Xiaofeng Shi Xuegang 《Animal Husbandry and Feed Science》 CAS 2016年第6期364-368,共5页
[ Objective] The paper was to study the effects of desert vegetation on temperature regulation and stabilization in desert area. [ Method] The survey data of quadrats in five kinds of plant communities in Minqin deser... [ Objective] The paper was to study the effects of desert vegetation on temperature regulation and stabilization in desert area. [ Method] The survey data of quadrats in five kinds of plant communities in Minqin desert area were preliminarily estimated. [Result] Desert vegetation had the ecological functions of regulating desert temperature and stabilizing sharp increase of temperature, especially the irreplaceable ecological function of slowing down sandstorm each spring in northwest China compared to physical sand-fixatian measures. The air humidity in forest region was relatively large, and the climate was more stable. The climate in desert area was dry, with intense changes in air temperature. Although the solar radiation utilization rate of desert vegetation per unit area in Minqin oasis fringe was 5.8% of that of 100% coverage vegetation, it had non-ignorable significance in regulating temperature of local desert. Regulating temperature was one of the ecological functions of desert vegetation. Previous studies only considered wind proof and sand-fixation functions of desert vegetation, but ignored its temperature regulation effect, and this was the ecological function of vegetation sand control different from physical sand-fixation measures such as sand barrier. [ Conclusion] It has important theoretical guiding significance and practical use value for prevention and control of desertification by studying ecological function of desert plants/vegetation. 展开更多
关键词 sand-fixatian forest Regulating air temperature Ecological function sandSTORM minqin desert area
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民勤绿洲荒漠过渡带固沙林土壤微生物数量和酶活性研究 被引量:7
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作者 王彦武 柴强 +1 位作者 欧阳雪芝 罗玲 《干旱区地理》 CSCD 北大核心 2016年第1期104-111,共8页
对民勤绿洲荒漠过渡带不同固沙林土壤微生物数量和土壤酶活性进行研究,以裸沙地为对照。结果表明:不同固沙林土壤微生物数量和土壤酶活性均存在差异,且均显著大于裸沙地;在0-60 cm土层中,土壤细菌、放线菌、真菌、过氧化氢酶、脲酶和... 对民勤绿洲荒漠过渡带不同固沙林土壤微生物数量和土壤酶活性进行研究,以裸沙地为对照。结果表明:不同固沙林土壤微生物数量和土壤酶活性均存在差异,且均显著大于裸沙地;在0-60 cm土层中,土壤细菌、放线菌、真菌、过氧化氢酶、脲酶和磷酸酶以梭梭林地最大,分别是对照的2.29倍、2.36倍、10.17倍、2.63倍、1.65倍和1.71倍;土壤微生物数量及其酶活性有明显的垂直分布特征,梭梭林的放线菌、真菌和蔗糖酶活性均随着土层深度增加而减小;相关性研究表明,土壤细菌、真菌和放线菌与土壤过氧化氢酶、脲酶、磷酸酶呈极显著正相关关系,相关系数均达到了69.6%以上。随着民勤绿洲荒漠过渡带植被的恢复,不同固沙林对干旱瘠薄的沙漠环境均有一定的适应性,各固沙林土壤的生物性质不断得到改善。 展开更多
关键词 绿洲荒漠过渡带 固沙林 土壤微生物 酶活性
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Comparative Analysis of Wind break and Sand fixation Functions of Several Main Forage Plants in Minqin Desert Area
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作者 Li Xiaolin Chang Zhaofeng +2 位作者 Wang Qi Han Fugui Duan Xiaofeng 《Animal Husbandry and Feed Science》 CAS 2017年第5期334-338,共5页
[Objective] The paper was to study wind-break and sand-fixation functions of forage plants in desert area. [Method]Based on the survey data of four major wind-break and sand-fixation plants( Haloxylon ammondendron,Art... [Objective] The paper was to study wind-break and sand-fixation functions of forage plants in desert area. [Method]Based on the survey data of four major wind-break and sand-fixation plants( Haloxylon ammondendron,Artemisia arenaria,Nitraria tangutorum and Ephedra przewalskii) in Minqin desert area,the longitudinal section area and the sandpile volume of an individual plant and per unit area were calculated. The wind-break and sand-fixation functions of four major plant communities were comparatively analyzed. [Result] The wind-break functions of an individual plant( cluster) successively were N. tangutorum > H. ammondendron > A. arenaria and E. przewalskii; the sand-fixation functions of an individual plant( cluster) successively were N. tangutorum > E. przewalskii; the wind-break functions per unit area successively were A. arenaria > H. ammondendron > N. tangutorum > E. przewalskii; the sand-fixation functions per unit area were N. tangutorum > E. przewalskii; the wind-break and sand-fixation function per unit area were N. tangutorum > A. arenaria > H. ammondendron >E. przewalskii.[Conclusion]A. arenaria can be selected for only wind-break,and N. tangutorum can be chosen for only sand-fixation. If given consideration to both,N. tangutorum and A. arenaria must be selected. 展开更多
关键词 WIND BREAK and sand FIXATION forest Longitudinal section area WIND BREAK FUNCTION sand FIXATION FUNCTION minqin desert area
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