There was a negative correlation between the nitrogenase activities of nitrogen fixing bacteria in root and that in leaf and stem.
此外，甘蔗根、茎、叶中固氮菌的固氮酶活性之间关系较为密切，根中固氮菌的固氮酶活性与叶片和茎中的都呈负相关。
In the nitrogen-free Pot experiment, the nodulating competitive ability of the parental and marked strains and their nitrogen fixing efficiency were tested.
通过砂培试验研究了标记基因对受体菌株的竞争结瘤能力和固氮有效性的影响。
Human activities such as fossil fuel combustion, nitrogen fertilizer production and cultivation of nitrogen fixing crops are the main sources of reactive n.
人类活动，如燃料燃烧、氮肥生产、固氮植物的培育和畜牧业的集约经营等是引起全球活性氮增加的主要原因。
One crucial part of this cycle-the fixing of pure nitrogen from the atmosphere into useful nitrogen-containing chemicals-depends more or less entirely on living things (lightning helps a bit).
氮循环的一个关键组成部分就是——在大气中，将纯净的氮固定为成含氮化合物的形式——这或多或少要完全依赖于生物(闪电仅起一点儿作用)。
Fixing nitrogen is an energy intensive process and it wasn't entirely clear exactly how the bacterium produces the energy it needs in order to perform.
固氮是一个加强能源的过程，而细菌为了完成任务而获取能量的过程目前尚不清楚。
Nitrogen for plant nutrition is mainly obtained from three sources: nitrogen-fixing plant, rain water and manure.
氮素是植物必要的营养元素之一，其主要来源有：生物固氮作用、降雨和灌溉水以及人工施肥。
Actinorhizal Plants are a kind of important natural nitrogen-fixing resources, and they have high value in reforestation as pioneer and accompanying species.
放线菌根瘤植物是自然界中一类重要的固氮资源，作为先锋树种和伴生树种在造林中有重要的应用价值。
Cyanobacteria are the only known organisms capable of fixing both CARBON DIOXIDE (in the presence of light) and NITROGEN.
氰基细菌是已知唯一能够固定二氧化碳(有光情况下)和氮的微生物。
The biological effect of protectively applied nitrogen on nodulation N-fixing activity, nitrogen forms in Xyloid liquid, and amount of assimilated nitrogen in soybean were studied.
从大豆结瘤、固氮活性、木质部溶质氮形态以及植株同化氮量论证了保护性施氮的生物学效应。
Environmental factors are always one of the major reasons why the symbiotic nitrogen-fixing system of rhizobia and legumes cannot come into full play in agricultural production.
环境因子的限制一直是豆科植物-根瘤菌共生固氮体系没有在农业生产中充分发挥作用的重要原因之一。
Although there is 34,500 tons of gaseous nitrogen in the air column above each acre of the earth's surface, this cannot be used by plants until it has been fixed by nitrogen-fixing bacteria and algae.
虽然在地球表面每英亩空气柱中有34,500吨气态氮，但是如果这些气态氮不被固氮菌和藻类固定，是不能被植物利用的。
Continuing treatments with acid, alkali and heating, a strain whose capability of nitrogen-fixing increase 458.65% comparing with the starting strain was obtained.
对其用酸碱及温度继续处理，得到一株抗性变异株，其固氮能力较出发菌株分别提高458.65%。
The effect of cellulose-decomposing fungus(CDF) mixed with associative nitrogen-fixing bacterium(ANFB) to cellulose-decomposing has been studied.
从纤维素分解菌与联合固氮菌的接种配比，研究了混合培养对滤纸分解的影响。
Microbes were degrading hydrocarbons, some appeared to be capable of oxidising methane, and there were genes active in the process of fixing, or converting from a gas, both nitrogen and carbon.
微生物在分解碳氢化合物，有些还能生成沼气，同时有基因在活跃地固定或转换含有氮和碳的气体。
Symbiotic nitrogen-fixing bacteria invade the root hairs of host plants, where they multiply and stimulate the formation of root nodules, enlargements of plant cells and bacteria in close association.
共生的固氮菌侵袭宿主植物的根毛，并在此繁殖和促进根瘤的形成、植物细胞和亲密共生细菌的扩大。
Symbiotic nitrogen-fixing bacteria invade the root hairs of host plants, where they multiply and stimulate the formation of root nodules, enlargements of plant cells and bacteria in close association.
共生的固氮菌侵袭宿主植物的根毛，并在此繁殖和促进根瘤的形成、植物细胞和亲密共生细菌的扩大。
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