固氮的

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。

The swainsonine mainly originated from the metabolism of Oxytropis endophyte, and its concentration was related with the nitrogen fixation of nodule, but not genetic characteristics.

棘豆中苦马豆素主要来源于内生菌的代谢产物，其含量与根瘤菌固氮作用有密切关系，而与遗传无关。

The 0-40cm soil layer soil mean value looked that mixes by the interlacing broadcasts the lawn soil ulmin, the alkaline hydrolysis nitrogen content to be highest; The fast-acting phosphorus, the fast-acting potassium are highest by the unicast awnless brome lawn content; The colleague mixes broadcasts lawn pH to be biggest.

无芒雀麦对土壤要求不严，耐贫瘠、严寒，耐碱性也较强，需氮较多，适宜与紫花苜蓿、沙打旺、野豌豆、百脉根、红三叶等豆科牧草混播，借助豆科牧草固氮作用，促进无芒雀麦良好生长[4]。本实验就是无芒雀麦单播草地和与紫花苜蓿混播草地对土壤理化性质的影响进行比较。

Often there are poor or no responses to Azospirillum inocula.

也经常有关于固氮螺菌接种剂效果不好或没有效果的报道。

The symbiosis formed by rhizobia and legume host plays an important role in agriculture.

根瘤菌与豆科植物形成的共生固氮体系在农业生产中具有重要作用。

Laboratory cultures of the rhizobia can fix ??only under special cultural conditions.

实验室培养的根瘤菌只有在特殊培养条件下才能固氮。

The research aimed to probe into the nitrogenfixationand absorption of different absorbents to soil.

探究不同吸附剂对土壤的固氮吸附作用。

In bacteroids, g enes essential f or sy mbiotic nitrogen f ixation are in duced.

为了进一步揭示nifA 在共生固氮体系中的功能，我们以固

Do the terminally differentiated bacteroids constitute a step towards a N2-fixing organelle?

在一定时期分化形成类菌体是否是形成固氮器官的必经步骤？

The Frankia-actinorhizal plant root nodule symbiosis occurs in 8 families of angiosperms.

固氮放线菌Frankia是能够诱导大范围的放线菌根植物产生根瘤放线菌。

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。