固氮

This system raised soil fertility and soil productivity through increased biological nitrogen fixation and by providing cattle manure.

这一体系通过豆科作物的生物固氮作用和牛粪还田使土壤肥力和土壤生产力得到提高。

N dilution method was used for screening soybean lines with high nitrogen fixation ability.

应用15N稀释法筛选出了具有高固氮能力的大豆品种和品系。

It would be meaningful to screen Rhizobium strains with high symbiotic nitrogen fixation activity for developing microbial manure agents.

是营养价值很高的饲用作物，也是北京地区大力发展的牧草品种之一，筛选与之共生固氮的根瘤菌，用于微生物肥料的生产，具有重要意义。

Among the blue-green algae are many species of nitrogen fixation.

许多种蓝藻有固氮的能力。

Mycorhizae perform the function of nitrogen fixation and storage.

菌根起着固氮和贮氮的作用。

The soil nitrogen status is a function of the processes of nitrogen fixation , microbial decomposition, nitrification and denitrification

土壤氮状况是一个固氮、微生物分解、硝酸化和脱氮过程的作用。

Moreover, the ability to develop a symbiotic relationship resulting in nitrogen fixation varies markedly among strains of Rhizobium.

而且，不同的根瘤菌中这种共生关系和固氮能力明显不同。

Effects of Boron on the Growth, Nutrients and Nitrogen-Fixing Ability of Chamaecrista rotundifolia

施硼对圆叶决明植株生长、养分含量及固氮能力的影响。

This research will be helpful for getting better knowledge of the evolution of Frankia strains, and provide scientific materials for protecting and utilizing of this nitrogen-fixing symbiotic resource.

该研究可加深对Frankia菌起源与进化的认识，并为保护和利用这一固氮共生资源提供科学依据。

Objective］ With Hippophae and Elaeagnus root nodules as research objects, the species diversity of nitrogen-fixing actinomycetes was studied.

［目的］以沙棘和沙枣根瘤为研究对象，深入研究固氮放线菌物种的多样性。

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。