自生固氮菌

自生固氮菌的生态分布及其对农药抗性的研究

Research on Ecogeographical Distribution of Abiogenous Azotobacter and Its Resistance to Pesticide

自生固氮菌第二固氮酶的研究&Ⅰ.菌种的分离和鉴定

Studies on the second nitrogenase of Azotobacter 1 . the selection and identification of strain

根际土壤中自生固氮菌和硝化细菌的数量和脲酶的酶活性显著相关，P细菌和磷酸酶活性显著相关，说明这些菌对酶活的产生贡献比较大。

This suggested , these bacterial contributed enzyme activity .

自生固氮菌是植物根际促生细菌（PGPR）的重要组成成分，并且可以将大气中的N2通过生物固氮作用供给植物生长，提高植物对氮素的利用。

Free-living nitrogen fixation bacteria are important plant growth-promoting rhizobacteria ( PGPR ), and they can supply plants with N by bio-nitrogen fixation .

自生固氮菌的固氮能力及其对春小麦生长发育的影响

Nitrogen fixation ability of azotobacter and its effect on growth of spring wheat

其中，根际好气性自生固氮菌、磷细菌和钾细菌三个生理类群的数量顺序为钾细菌＞磷细菌＞自生固氮菌。

The quantitative sequence was : silicate bacteria > phosphorus bacteria > aerobic azotobacter .

解磷解钾自生固氮菌的分离筛选及鉴定

Screening and Identification of the Bacterium Which Have High Efficiency on Resolving Phosphorus and Potassium and in Nitrogen Fixation

4种土壤微生物生理类群对混合稀土抑制敏感性依大小排序为：纤维素分解菌氨化细菌硝化细菌自生固氮菌。

The sensitivity of these four consortia to the inhibition of REEs was in an order : bacteria decomposing cellulose ammonifying bacteria nitrifying bacteria nitrogen fixation bacteria .

结果表明，外源低剂量稀土的持续积累会对土壤氨化细菌、硝化细菌、纤维素分解菌和自生固氮菌产生刺激、抑制、再刺激的交替作用。

The continuous accumulation of REEs exhibited alternative effects of stimulation , inhibition and re-stimulation on soil ammonifying bacteria , nitrifying bacteria , nitrogen fixation bacteria and bacteria decomposing cellulose .

结果表明：不同茶树品种根系对磷、钾细菌均有明显的根际效应，但对自生固氮菌则为负效应；

The results showed that the roots of three species of tea exert a positive rhizosphere effect on the phosphobacteria and postassibacteria , and negative rhizosphere effect on the Azotobacter .

结果表明，土壤表层固氮细菌数量随土壤污染的增高而不同程度减少，亚表层自生固氮菌数量无明显变化。

The results showed that the number of nitrogen-fixing bacteria population in soil surface was decreased with the contamination level increasing , while that in soil subsurface had no marked change .

而且氨化细菌、好气性自生固氮菌、好气性纤维素分解菌、嫌气性纤维素分解菌分别高56.7、10.90、4.23、7.02倍。

And the community numbers of ammonifying bacteria , aerobic azotobacter , aerobic cellulose degradation bacteria and anaerobic cellulose degradation bacteria were 56.7 , 10.90 , 4.23 and 7.02 times higher than those of cK .