干旱区生态环境知识资源中心(Arid): 毛乌素沙地沙打旺根围AM真菌的空间分布

Arid

	毛乌素沙地沙打旺根围AM真菌的空间分布
其他题名	Spatial distribution of arbuscular mycorrhizal fungi in Astragalus adsurgens root-zone soil in Mu Us sand land
	贺学礼 1; 白春明 2; 赵丽莉 1
ISSN	1001-9332
出版年	2008
卷号	19 期号:12 页码:2711-2716
中文摘要	对毛乌素沙地5个不同生态条件下沙打旺(Astragalus adsurgens)根围土壤0～50cm土层AM真菌空间分布进行研究.结果表明:不同样地和采样深度下AM真菌孢子密度和定殖率存在显著差异,最高定殖率和最大孢子密度均出现在10～30cm土层;定边样地孢子密度最高,并显著高于其他样地;塔湾样地菌丝和总定殖率最高,宁条梁和塔湾样地泡囊定殖率高于其他样地.总球囊霉素(TG)和易提取球囊霉素(EEG)含量均在塔湾样地最高,分别为1.18mg.g~(-1)和0.65mg.g~(-1).土壤pH对孢子密度、泡囊和丛枝定殖率、TG和EEG均有极显著正效应,TG和EEG分别与孢子密度、土壤有机C、碱解N和速效P呈极显著正相关.沙漠土壤球囊霉素占有机C的比例高于农田土壤,可能是沙漠土壤有机C的主要来源之一.球囊霉素可作为评估沙漠土壤AM真菌活动和土壤生态状况的有效指标.
英文摘要	This paper studied the spatial distribution of arbuscular mycorrhizal(AM) fungi in Astragalus adsurgens root-zone soil in Mu Us sand land under five different ecological conditions.The results showed that the colonization and spore density of AM fungi differed significantly with sampling sites and soil depths.The highest colonization rate and spore density of AM fungi were found in 10-30 cm soil layer,and the highest spore density was at Dingbian site.Ningtiaoliang and Tawan sites had the highest vesicular colonization,and Tawan site had the highest total and hyphal colonization.The contents of total glomalin(TG) and easily extractable glomain(EEG) were the highest at Tawan site,being 1.18 mg·g~(-1) and 0.65 mg·g~(-1),respectively.Soil pH had significant positive effects on the vesicular and arbuscular colonization,spore density,TG,and EEG,and the TG and EEG had significant positive correlations with spore density,soil organic carbon(SOC),and soil available N and P.The proportion of glomalin to SOC was higher in desert soils than in agricultural soils,which implied that glomalin could be one of the main origins of SOC in desert ecosystem.Therefore,glomalin could be a useful index for the evaluation of soil AM fungal activity and soil ecology.
中文关键词	AM真菌 ; 球囊霉素 ; 有机C ; 沙打旺 ; 毛乌素沙地
英文关键词	AM fungi glomalin soil organic carbon Astragalus adsurgens Mu Us sand land
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:3438787
来源机构	西北农林科技大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/223005
作者单位	1.河北大学生命科学学院, 保定, 河北 071002, 中国; 2.西北农林科技大学生命科学学院, 杨凌, 陕西 712100, 中国
推荐引用方式 GB/T 7714	贺学礼,白春明,赵丽莉. 毛乌素沙地沙打旺根围AM真菌的空间分布[J]. 西北农林科技大学,2008,19(12):2711-2716.
APA	贺学礼,白春明,&赵丽莉.(2008).毛乌素沙地沙打旺根围AM真菌的空间分布.,19(12),2711-2716.
MLA	贺学礼,et al."毛乌素沙地沙打旺根围AM真菌的空间分布".19.12(2008):2711-2716.