干旱区生态环境知识资源中心(Arid): 北方两省农牧交错带沙棘根围AM真菌与球囊霉素空间分布

Arid

	北方两省农牧交错带沙棘根围AM真菌与球囊霉素空间分布
其他题名	Spatial distribution of arbuscular mycorrhizal fungi and glomalin of Hippophae rhamnoides L in farming-pastoral zone from the two northern provinces of China
	贺学礼 1; 陈程 1; 何博 2
来源期刊	生态学报
ISSN	1000-0933
出版年	2011
卷号	31 期号:6 页码:1653-1661
中文摘要	2009年7月在内蒙古和河北两省农牧交错带沙棘(Hippophae rhamnoides L)集中分布区选取3个典型样地,分别从0-10cm,10-20cm,20-30cm,30-40cm和40-50cm土层采集沙棘根围土壤样品,研究了沙棘根围AM真菌与球囊霉素空间分布及与土壤因子的相关性.结果表明,沙棘能与AM真菌形成良好的疆南星型(Arum-type)丛枝菌根.AM真菌定殖率和孢子密度与样地生态条件密切相关.大梁底村和多伦东样地AM真菌不同结构定殖率及孢子密度无明显差别,但均显著高于黄柳条村样地,只在大梁底村发现丛枝定殖;孢子密度在3个样地均随土层加深而降低,不同结构定殖率在大梁底村随土层加深而降低,其他2个样地无明显变化规律;AM真菌最高定殖率和最大孢子密度均出现在0-30cm浅土层.根围土壤总球囊霉素(TEG)和易提取球囊霉素(EEG)含量在3个样地均随土层加深而降低.相关性分析表明,孢子密度与菌丝定殖率,泡囊定殖率和总定殖率极显著正相关.AM真菌菌丝,泡囊和总定殖率与土壤pH值,有机C,碱解N和速效P含量,脲酶和碱性磷酸酶活性极显著正相关,丛枝定殖率与土壤碱解N含量和脲酶活性显著正相关.多元线性回归方程表明,AM真菌不同定殖结构和土壤因子对TEG和EEG含量贡献不同,对于TEG:菌丝>孢子>泡囊;有机C>速效P>酸性磷酸酶>pH值,对于EEG:泡囊>孢子>菌丝;有机C>速效P.结果建议,AM真菌孢子密度,菌丝定殖程度和土壤球囊霉素含量在一定程度上能综合反应土壤AM真菌群落,有机C动态和养分循环进程,可以作为土壤质量及功能评价的新指标进一步深入研究
英文摘要	Arbuscular mycorrhizal fungi(AMF) are important functional components of ecosystems and are the most widely distributed microbes among the soil microorganisms. Glomalin, which is produced by AMF,is a kind of glycoprotein that can be extracted from soil. Its ubiquity, coupled with apparent recalcitrance of glomalin and consequent long residence time in soil, can result in glomalin comprising large pools of soil carbon and nitrogen. Hippophae rhamnoides L is one of the excellent sand-fixation plants that can not only well adapt to arid desert environment, but also fix sand and improve the texture or fertility of soil,so as to keep the balance and stability of the desert ecosystem. In this paper, the spatial distribution of AMF and glomalin, and the relativity of AMF and glomalin with environmental factors in rhizosphere of Hippophae rhamnoides L were investigated in farming-pastoral zone between Inner Mongolia and Hebei province. In July 2009,we collected the root and soil samples from three different sample sites, which are Da Liandi, Huang Liutiao and east of Duo Lun, respectively. Root samples were collected from four robust Hippophae rhamnoides L, and soil samples were collected from three sample sites and divided into five layers on the basis of depth, from top to bottom: 0-10 cm,10-20 cm,20-30 cm,30-40 cm,40-50 cm, respectively. The results showed that a good symbioses relation is formed between AMF and Hippophae rhamnoides L. Mycorrhizal type is Arum-type. The distribution and activity of AMF, the content of total extractable glomalin(TEG) and easily extractable glomain(EEG) were significantly affected by ecological conditions and soil depth. In Daliangdi and Duolun sites, there was no obvious difference in the spore density, but in Huangliutiao site was much higher;the colonization of AMF showed the same trend with spore density. Meanwhile the arbuscule was only found in Daliangdi site. The maximal value of the spore density occurred at the 0-10 cm soil layer in three sites, and then decreased with the increasing of the soil depth, and the percentage of AM fungal colonization showed the same trend in Daliangdi site, while no obvious difference was found in the variation laws of different structures of AM fungal colonization in other sample sites. The highest colonization rate and spore density of AMF were found in the 0-30 cm soil layer in each site. The highest contents of TEG and EEG occurred at the 0-10 cm soil layer, and then gradually decreased with the increasing of soil depth. Spore density had significantly positive effects on total, hyphal and vesicular colonization. Different structures of AMF had significantly positive effects on soil pH, organic C, alkaline N, available P, urease and alkaline phosphatase. Arbuscular colonization had a positive effect on alkaline N and urease. The result of multiple linear regression equation showed that different colonial structures of AMF and different soil factors had different impact on the content of TEG and EEG.For TEG: hyphae>spore> vesicale;organic C> available P> acid phosphatase. For EEG: vesicale >spore> hyphae;organic C> available P. Spore density, colonisation of hyphae, the contents of TEG and EEG were remarkably correlated with the contents of soil nutritions and the activities of soil enzymes, and in the future research, these indexes can be used as parameters to monitor the development of AMFcommunity, organic carbon dynamic and nutrition cycle in sand soil
中文关键词	AM真菌 ; 球囊霉素 ; 空间分布 ; 沙棘 ; 农牧交错带
英文关键词	arbuscular mycorrhizal fungi Glomalin spatial distribution Hippophae rhamnoides L farming-pastoral zone
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ECOLOGY
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:4165127
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/2XILL650/226897
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,陈程,何博. 北方两省农牧交错带沙棘根围AM真菌与球囊霉素空间分布[J]. 西北农林科技大学,2011,31(6):1653-1661.
APA	贺学礼,陈程,&何博.(2011).北方两省农牧交错带沙棘根围AM真菌与球囊霉素空间分布.生态学报,31(6),1653-1661.
MLA	贺学礼,et al."北方两省农牧交错带沙棘根围AM真菌与球囊霉素空间分布".生态学报 31.6(2011):1653-1661.