固氮

Certain N-fixing cyanobacteria also form a symbiotic relationship with the water fern Azolla in rice paddy systems.

一些固氮的兰细菌也能在水稻田里与水生蕨类红萍形成共生关系。

Azolla,a symbiosis of blue green alga and aquatic fern,widely distributesin rice paddy fields,lakes and swamps.

萍是固氮蓝藻与蕨类植物的共生体，广泛分布于稻田、湖泊及沼泽等水生生态系统。

Effects of boron on the growth, nutrition quality and nitrogen-fixing ability were studied in Chamaecrista rotundifolia. Compared with the control, the branch numbers, root and shoot biomass of C.

设立田间小区试验，探讨在红壤中施用不同浓度的硼肥对圆叶决明植株生长、牧草品质和根瘤固氮能力的影响。

Effects of boron on the growth, nutrition quality and nitrogen-fixing ability were studied in Chamaecrista rotundifolia. Compared with control,the branching numbers, root and shoot biomass of C.

设立田间小区试验，探讨在红壤中施用不同浓度的硼肥对圆叶决明植株生长、牧草品质和根瘤固氮能力的影响。

The biological N-fixation rate of Chamaecrista rotundifolia showed a trend of increasing and then decreasing, climbing to the peak of 29.50% at the N2 level (30 mg/kg) and then gradually decreasing, had a highly significant difference between the treatments. At a certain N level, the N absorption of C.

结果表明：圆叶决明生物固氮百分率随着施氮水平的增加呈先升高后下降的趋势，并在N2（30 mg/kg）水平下达到最高，为29.50％，之后逐渐下降，且各处理间差异极显著。

Purpose of the experiment was searching for the method of cutting reproduction of Elaeagnus mollis., providing a foundation for the clonic selection in the wild population, and offering sufficient quantity of clone stocks for studying the relation between growth and nitrogen—fixing root tubercle bacteria.

本试验的目的是研究翅果油树扦插繁殖方法，在其野生群体中进行无性系良种选育的效果，以及翅果油树生长与固氮根瘤菌之间的关系，为接种■氮根瘤菌提供足够数量的无性系苗木。

Coralloid roots A type of root regularly produced by cycads, which contains symbiotic nitrogen-fixing cyanobacteria in root nodules, giving the roots a knobbly coral-like appearance.

珊瑚状的根：由苏铁类植物产生的一种类型的根，根瘤中含有共生的固氮蓝细菌，使根形成珊瑚状的有节的形状。

Coriaria sinica ; nodulation ; nitrogen fixation ; photosynthesis

马桑；结瘤；固氮；光合作用

Endophytic diazotrophic bacteria existed in epiderm al cells,cortex cells,vascular tissue cells and intercellular

皮层细胞、维管组织细胞和细胞问隙中存在。关键词：水稻；内生固氮细菌；分离；分布

Sulfur can promote the formation of chlorophyll; sulfur involved in the process of nitrogen fixation, to increase the utilization rate of fertilizer; in cruciferous rape, peanuts propylene mustard oil, Liliaceae onions and garlic contained in Suanyou fat, such as sulfur compounds in human nutrition and medicine There are special effects to enhance the quality of these crops.

硫能促进叶绿素的形成；硫参与固氮过程，提高肥料利用率；十字花科中油菜、花生的丙烯芥子油，百合科葱、蒜中所含的蒜油等硫脂化合物在人体营养和医药方面有特殊的功效，提高这类作物的品质。

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。