兰州地区盐碱地小麦根际联合固氮菌分离及部分特性研究
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* 国际原子能机构(International Atomic Energy Agency,IAEA)项目(CPR/5/014);中国科学院“百人计划”项目资助


ISOLATION AND CHARACTERISTICS OF ASSOCIATIVE SYMBIOTIC NITROGEN BACTERIA FROM RHIZOSPHERE OF WHEAT IN SALINE SOIL IN LANZHOU AREA
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    摘要:

    结合气相色谱仪和高效液相色谱仪,利用乙炔还原等方法对兰州地区盐碱地小麦根际联合固氮菌进行分离和固氮酶活性、溶磷性、分泌植物激素特性研究。结果表明:从小麦根际分离获得的12株联合固氮菌株固氮酶活性差异较大(C2H4,1246~6516nmol h-1ml-1),具有较高固氮酶活性的菌株较少(C2H4大于500nmol h-1ml-1的菌株只有4株);固氮菌株中有2株具有溶磷性,其溶磷强度(P)分别为1630μgml-1和982μgml-1;9株固氮菌株可分泌IAA,但分泌IAA浓度相对较低(140~1513μg ml-1),大于10μ gml-1的菌株只有2株。从菌株固氮酶活性、溶磷性和分泌植物生长素特性看,Pseudomonas sp.ChW1、Azotobacter sp.ChW5、Zoogloea sp.ChW6、Azotobacter chroococcum ChW11和Azospirillus sp.ChW15等在研制小麦菌肥方面具有较大的开发潜力。

    Abstract:

    Studies on isolation and characteristics of nitrogenase activity, phosphate solubilizing power and auxin (IAA) producing of associat ive symbiotic nitrogen bacteria (ASNB) from wheat rhizosphere in saline soil were carried out in Lanzhou area, Northwest China.The results show there are 12 ASNB strains obtained; Nitrogenase activities of the strains vary distinctly (C2H4, 124.6~651.6 nmol h-1 ml-1); Among the strains, two show phosphate solubilizing power with capacity reaching 16.30 g ml-1 and 9.82 g ml-1, respectively; nine show ability to produce auxin (IAA) although the ability varies with the strains (IAA concentration 1.40~15.13 g ml-1).In the view of nitrogenase activity, phosphoru-s solubilizing power and IAA producing, Pseudomonas sp.ChW1, Azotobacter sp.ChW5, Zoogloea sp.ChW6 Azotobacter chroococcum ChW11 and Azospirillus sp.ChW15 show higher potential as biofertilizer inoculums for wheat in the area.

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姚拓,龙瑞军,王刚,胡自治.兰州地区盐碱地小麦根际联合固氮菌分离及部分特性研究[J].土壤学报,2004,41(3):444-448. DOI:10.11766/trxb200305230318 Yao Tuo, Long Ruijun, Wang Gang, Hu Zizhi. ISOLATION AND CHARACTERISTICS OF ASSOCIATIVE SYMBIOTIC NITROGEN BACTERIA FROM RHIZOSPHERE OF WHEAT IN SALINE SOIL IN LANZHOU AREA[J]. Acta Pedologica Sinica,2004,41(3):444-448.

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  • 收稿日期:2003-05-23
  • 最后修改日期:2003-11-10
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  • 在线发布日期: 2013-02-25
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