固氮

The Cyanobacteria and soil bacteria such as Azotobacter, which carry out BNF without plant involvement, are examples of free-living nitrogen fixing organisms.

兰细菌和土壤细菌如固氮菌都是自生固氮微生物的代表，它们可以在没有植物介入下进行生物固氮。

The greatest amount of BNF by free-living nitrogen-fixing organisms may be in the flood waters of paddy rice production.

自生型固氮微生物进行的生物固氮量最大的可能是在淹水的水稻田里。

Partner in nitrogen fixation, e.g. signal transduction and symbiotic genes induction.

的兴趣在研究共生固氮发育过程俩伙伴间的相互作用、信号传导和共生固氮基因的表达。

Breeding of nitrogen-fixing bacteria is the basis for nitrogen-fixing microbial fertilization.

固氮微生物菌种选育是固氮微生物肥料生产应用的基础。

The nodulation and nitrogen fixation of Casuarina-Frankia symbiont varied in response to different water stress.

中度水分胁迫对木麻黄结瘤固氮影响不大，强度水分胁迫使木麻黄的结瘤量、固氮酶活性、固氮量显著降低。

Using the closed chamber method,〓 fluxes of various soil-soybean systems(unplanted,planted with unnodulated and planted with nodulated soybean) and theenvironmental factors were measured at the Shenyang Experimental Station ofEcology (41°42'N, 122°23'E)of Chinese Academy Sciences in 1994,1996 and 1997.Also,the 〓 emissions of soybean plant and soybean nodule were studied in thelaboratory.

于中国科学院沈阳生态试验站(4l°32′N，122°23′E)，采用封闭式箱法对不结瘤固氮、结瘤固氮的大豆-土壤系统以及裸地的〓排放通量及主要环境因子进行了多年系统的原位观测，并在实验室条件下，对大豆植株及其根瘤的〓排放进行了研究。

On the base of study on arbuscular endomycorrhiza of Alnus of Changbai Mountain and nitrogen-fixing woods of Northeast of China, the paper attempted to reveal the DNA molecular polymorphism of the symbiotic arbuscular endomycorrhizal fungi for the effect that make better use of the fungi resource.

本项研究利用分子生物学技术和研究方法对中国吉林长白山地区非豆科固氮植物以及东北地区固氮树木的丛枝菌根真菌DNA分子多态性及其与宿主植物之间的相互关系等进行初步研究，旨在利用分子生态学理论和研究方法揭示丛枝菌根真菌多样性及其与宿主植物之间相互适应和协同进化的一般规律，为更好地保护和利用这一重要的微生物资源提供理论依据。

While two herbicides had no significant effects on the growth of three cyanobacteria at low concentrations (0.01~0.001mg/L), they made damage to cells and affect cyanobacteria's growth at high concentrations (10~100mg/L). EC_(50) values of three cyanobacteria were showed below: Anabaena azollae, 3.172 mg/L; Anabaena azotic, 3.654 mg/L and Anabaena flos-aquae, 3.377mg/L Nitrogenase activities of three species also showed different tolerant capabilities to the two herbicides under 10% vol.

在低浓度(0.01~0.001mg/L)的2种除草剂的作用下，3种固氮蓝藻的生长没有受到明显的影响，而在高浓度下(10~100mg/L)，固氮蓝藻藻细胞在形态上出现受损症状，同时生长速率也受到明显的抑制。120h时，满江红鱼腥藻，水华鱼腥藻及固氮鱼腥藻的EC_(50)值分别为3.172， 3.654及3.377mg/L。

In this study, differences among tolerant capabilities of three species of nitrogen-fixation cyanobacteria (Anabaena azollae, Anabaena flos-aquae, Anabaena azotic) to two new sulfonylurea (Monosulfuron and Monosulfuron ester) were studied, which could be used to further explain the resistant mechanism to sulfonylurea herbicides and how these herbicides take effect.

本文以满江红鱼腥藻、固氮鱼腥藻及水华鱼腥藻为代表，利用环境毒理学的研究手段，通过研究3种固氮蓝藻对2种磺酰脲类除草剂---单嘧磺隆、单嘧磺酯的耐药性差异来揭示对磺酰脲类除草剂产生抗药性和耐药性的机理。

These results show counteractive effects of burning on N fixation of C.

结果表明，在个体尺度上，与对照相比，火烧区中地衣体烧损的坚韧胶衣固氮活性降低了42.3%，而无烧损的个体固氮活性则升高了28.4%。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。