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The changes of population density of Rhizosphere bacteria, fungi and actinomyces, and the types and population density of nitrogen-fixing bacteria, phosphobacteria and potassium-bacteria in different types of soils were studied.

研究了不同肥力烟区根际细菌、真菌和根际放线菌的数量变化,以及固氮细菌、磷细菌和钾细菌的数量和种类的变化。

The amount of ammonfying took absolute dominance while that of cellulolytic was the lowest. Aerobe azotobacter played an important role in fixing nitrogen while aerobe bacteria was vital in fibrin-dissolving.

氨化细菌总数处于绝对的优势,纤维素分解菌的数量最少,好气固氮菌在固氮活动中起主要作用,纤维素的分解主要是好气性菌在起作用。

Terrestrial microorganisms play a vital role in soil nitrogen cycling. They participate in important ecological processes such as nitrogen fixation, ammonification, nitrification and denitrification.

土壤微生物在土壤氮循环中发挥着不可替代的作用,参与了包括固氮作用、氨化作用、硝化作用和反硝化作用等重要生态过程。

The discoveries of the hemoglobin genes which encode the hemoglobins related to symbiotic nitrogen fixation in legumes and those not related to symbiotic nitrogen fixation in legumes andnon-legumes including cereals , make reseajrchers have a new look, resulting in two kinds of planthemoglobins: symbiotic and nonsymbiotic hemoglobins.

对这两种血红蛋白的性质、功能、基因结构及表达等方面的研究不仅对共生固氮中植物与微生物的相互关系和固氮工程研究;而且对植物细胞的呼吸代谢和耐涝机理等研究有重要价值。

Two relatively recent independent developments stand behind (stand behind:后援,做后盾) the current major research effort on nitrogen fixation, the process by which bacteria symbiotically render leguminous plants independent of nitrogen fertilizer.

两项相对近期且互为独立的事态发展激励了研究者目前对固氮作用进行重大的研究努力,而所谓固氮作用,是指细菌通过这一过程,以共生关系的手段,致使豆科植物独立于氮肥。

It has been proved that azotobacter CN-2 has a higher activity of nitrogen fixation in pure slant culture. Inoculated to wheat seen, the azotobacter can live in the rhizosphere, which has a higher activity of nitrogen fixation and improves nitrogen supplement to plant. Weight and nitrogen content of dry wheat seeding have been increased.

证实固氮菌CN-2具有较高的斜面纯培养物固氮活性,小麦播种时接种固氮菌,可以定殖在小麦苗根际并有较高的固氮活性,能显著改善小麦氮素供应,使苗干重、苗含氮量比对照均有较大幅度的提高。

Like rhizobia, the nitrogen-fixing endophyte Frankia elicits the formation of specialized root nodule structures which house BNF processes.

像根瘤菌一样,固氮的内寄生弗兰克氏菌能够诱发特殊的根瘤结构,在其中进行生物固氮过程。

The results indicated: the nitrogen of root,stem and leaf was mainly from soil and fertilizer nitrogen at growth stage,and the nitrogen from root nodule azotification started and increased at later growth...

结果表明,在大豆生育前期土壤氮和肥料氮是根、茎、叶片氮素的主要来源,在生育后期根瘤固氮开始增加;随生长大豆荚果氮素中土壤氮所占比例逐渐减小,根瘤固氮所占比例逐渐增加,并在收获期(R8)达到总量的70.6%,肥料氮所占比例一直很低。

The results indicated: the nitrogen of root,stem and leaf was mainly from soil and fertilizer nitrogen at growth stage,and the nitrogen from root nodule azotification started and increased at later growth stage.

结果表明,在大豆生育前期土壤氮和肥料氮是根、茎、叶片氮素的主要来源,在生育后期根瘤固氮开始增加;随生长大豆荚果氮素中土壤氮所占比例逐渐减小,根瘤固氮所占比例逐渐增加,并在收获期(R8)达到总量的70.6%,肥料氮所占比例一直很低。

The investigation deals,with the nitrogen fixation of some blue-green algae isolated from the soils of rice fields.Samples of algae-bearing soils were collected from rice fields in the provinces of Hupeh,Hunan and Kiangsi.

湖北、湖南和江西等地采集的稻田蓝藻经过分离、培养、缺氮培养初步找到可能固氮的蓝藻后,进一步得出了无菌的纯培养的蓝藻藻种,经过试验和用微量凯氏法测定其产生的氮量,确定了四种蓝藻系固氮蓝藻。

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