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    A strain of Klebsiella oxytoca was isolated from wheat root sphere in Shandong. Its Nitrogen—fixing activity is 2708.33nmC_2H_2/bottle/hr. with the method of reducing C_2H_2. The cultural and morphological characteristics, growth, physiological and biochemical properties of this steain were studied.
    从小麦根系分离筛选到产酸克雷伯氏杆菌(klebsiella oxytoca)一株用乙炔还原法测定其固氮酶活性为2708.33nmC_2H_4/管/小时,研究了菌株的培养和形态特征,生长和生理生化特性。
    We also found that growth activity of the strain HWZ2 was accelerated in co cultures with two other nitrogen fixing bacteria (GWZ1 and GWZ2) isolated from the rice root.
    同时发现HWZ2与水稻根系分离到的两株自生好养固氮菌GWZ1,GWZ2之间具有协同生长。
    Methods for CO_2 analysis (Soda lime absorption, IRGA and chromatograph analysis) and root separation methods (Excised root and trenched box) did not have a significant effect on Q_ 10 values of soil and root respiration (p>0.10), but in vitro measurements of stem respiration yielded a significantly higher Q_ 10 value than in vivo methods (p<0.05).
    不同的CO2 分析方法(碱吸收法,红外线测定技术和气相色谱方法)对土壤呼吸Q10值测定结果的影响不显著(p>0.10),根系分离方法(断根测定和壕沟隔断测定)也对根系呼吸的Q10值影响也不显著(p>0.10)。
    A SCREENING EXPERIMENT ON STRAINS OF AMMONIA EXCRETING NITROGEN-FIXING BACTERIA ISOLATED FROM RICE ROOTS
    水稻根系分离菌泌氨菌株的筛选试验
    Our experiment showed that ammonium microdiffusion apparatus as recommended by Burris in screening the strains of natural mutant among nitrogen-fixing organisms was feasible.
    本试验采用Burris推荐的氨微量扩散法,从309个水稻根系分离菌株中筛选具有泌氨特性的固氮菌自然突变菌株。
    A stain of plant Growth Promoting Rhizolbacteria (PGPR) was isolated from the roots of silage maize growing in Xining Dairy Farm. According to the morphological, cultural, physiological and biochemical characteristics, it was identified as Bacillus cereus, Which Stimulated the growth of silage maize seedling markedly.
    从西宁奶牛场青贮玉米根系分离出促生菌,依据形态、培养性状、生理生化特征,鉴定为蜡状芽胞杆菌(Bacillus cereus),该菌株能明显促进青贮玉米幼苗生长。
    Bacillus sp.strain C87,isolated from the root system
    从棉苗根系分离的99个芽孢杆菌中,筛选出对棉立枯病有控制作用和对棉苗有促生作用的C_(87)菌株。
 

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