Methods Porous ceramics were used as immobilization carrier. Optimum conditions for nitrate-nitrogen removal of downflow fixed-bed bioreactor were studied.
方法采用多孔陶粒作反硝化细菌固定化载体，研究下流式固定床生物反应器的适宜脱氮条件；
An experiment in field and artificial penetration-filter pond test both were conducted to show factors affecting content of nitrate-nitrogen in soil in the present study.
采用田间试验及人工渗滤池试验方法，研究了土壤中硝态氮含量的影响因素。
The influence of bleeding sap and Nitrate-nitrogen, Amino acid in root sap of K4 which grown in the zone is researched in seed treatments and initial bloom stage after spraying on leaf with EDTA-Mn.
以“垦农4号”为材料，利用锰浸种和初花期叶面喷施，在小区试验的条件下研究了锰对大豆根系伤流量、伤流液中硝态氮和氨基酸含量调控的效应。
Even nitrogen, which is a gas in its elemental state, is normally absorbed from the soil as nitrate ions.
即使是元素状态为气体的氮，也通常作为硝酸根离子从土壤中被吸收。
Nitrate and water-soluble organic nitrogen were migrated with deionised water migrating and increased subsoil fertility.
硝酸盐和水溶性有机氮随着去离子水的迁移而迁移，并增加了土壤的肥力。
Then anaerobic bacteria take that nitrate and turn it into harmless nitrogen gas.
最后厌氧菌将硝酸盐转化成无害的气体氮。
The lights prevent production of a particular type of nitrogen-oxide molecule known as a nitrate radical, which forms from reactions of nitrogen dioxide with ozone.
这些照明灯阻止了一种特殊类型的二氧化氮水分子——它被认为是一种硝分子团——的生成，而二氧化氮水分子则是二氧化氮和臭氧的反应物。
Some phytoplankton can fix nitrogen and can grow in areas where nitrate concentrations are low.
一些浮游植物可以通过固氮在硝酸盐含量较低的地区生长。
Nitrate nitrogen removal from ground water by autotrophic denitrification in a packed bed reactor.
固定床自养反硝化去除地下水中的硝酸盐氮。
The final reduction product of nitrate nitrogen is ammonia nitrogen.
硝酸盐氮的最终还原产物为氨氮。
Nitrate nitrogen removal from ground water by autotroph IC denitrification in a packed bed reactor.
固定床自养反硝化去除地下水中的硝酸盐氮。
In nitrate fertilizer sources, the contents of nitrogen and nitrate in maize were highest.
而以硝态氮肥为氮源时，玉米叶片硝态氮含量和全氮含量最高。
This paper reports the effect of DCD in seedling stage to soil microorganism of bacteria, mold and actinomycetes, and the concentration changes of both ammonium nitrogen and nitrate nitrogen in soil.
实验研究了双氰胺在玉米苗期对土壤微生物细菌、霉菌和放线菌的影响，及对土壤中铵态氮和硝态氮贮量变化的影响。
Everybody concerned how to decrease the nitrate nitrogen content in vegetable increasingly.
如何降低蔬菜中的硝态氮含量受到人们日益广泛的关注。
Nitrate and water soluble organic nitrogen were migrated with deionised water migrating and increased subsoil fertility.
硝态氮和水溶性有机氮随灌溉水向下迁移，对底土具有培肥作用。
The nitrate nitrogen makes the vegetable nitrate quickly rising, the ammonium nitrogen especially the ammonia chloride nitrate decrease the nitrate content.
硝态氮使蔬菜硝酸盐含量迅速上升，铵态氮尤其氯化铵硝酸盐增加较少。
Coupling effects of water and fertilizers on translocation of nitrate nitrogen in protected land were studied with the design of quadratic orthogonal rotational combinations.
采用二次回归正交旋转组合设计，研究了水肥耦合效应对保护地土壤硝态氮运移的影响。
Field experiment was conducted for studying the effect of nitrogen forms on the yield of Chinese cabbage and the accumulation of nitrate.
通过田间试验研究了不同形态氮肥对大白菜产量及硝酸盐累积的影响。
The biomass of Chlorella vulgaris was increased without influence on its chlorophyll content when nitrate was used as nitrogen source.
在以硝酸盐为氮源时，谷氨酸可增加小球藻的生物量，对叶绿素含量无明显影响。
As to the whole quality of tobacco leaf, the blend 50% : 50% of nitrate nitrogen and nitrite nitrogen is the advisable choice.
从烟叶总体质量上讲，硝态氮与氨态氮的质量比为50%：50%是可取的肥料配比。
With the nitrogen application, the nitrate nitrogen contents in spinach leaves were only dramatically decreased by Mo application at growth prophase, the (decreasing) amplitude was 21.2%.
施氮条件下，施钼仅显著降低了菠菜生长前期叶片中硝态氮含量，降幅达21 2%。
The measurement of nitrate nitrogen and nitrite nitrogen in seawater has such disadvantages as many disturbing components, long time, poor repeatability and accuracy.
水体中尤其是海水中硝酸盐氮的测定较繁琐，干扰物质多，分析时间长，重现性差，准确性不高。
Some commercial laboratories use periodic nitrate nitrogen tests as guides .
许多商业性的试验室已应用定期的硝态氮分析作为指导。
A biomembrane packed bed reactor with sulfur and limestone as solid filling material for removal of nitrate nitrogen was studied.
研究了装填固体填料硫和石灰石的生物膜反应器对水中硝酸盐氮的去除。
The mycelia well utilized yeast meal and peptone, but not very well nitrate nitrogen and ammonium nitrogen.
在对氮源的利用上，供试香灰菌株对酵母粉、麸皮和蛋白胨的利用较好，对硝态氮和铵态氮的利用较差。
The dissolved nitrogen (DIN) concentrations in the Wujiang River basin were much higher than the global average values and the main form of nitrogen was nitrate nitrogen (NO3-N).
乌江流域溶解无机氮含量较世界平均水平高，其主要存在形式为硝态氮（NO_3-N）。
In water, nitrogen exists in form of organic nitrogen, ammonia nitrogen, nitrite and nitrate.
在水中，氮是以有机氮、氨态氮、亚硝酸氮和硝酸氮的形式存在的。
The experiment and theory all indicates that the effect of ammonium salt as the degumming nitrogen additive is better than the effect of nitrate as the degumming nitrogen additive.
试验和理论都表明，以铵盐作为含氮添加剂的脱胶效果要好于以硝酸盐作为含氮添加剂的脱胶效果。
Regress the load of nitrate, ammonium and total nitrogen by MQ equation.
对硝氮、氨氮、总氮产污负荷进行MQ回归，提炼回归方程。
Regress the load of nitrate, ammonium and total nitrogen by MQ equation.
对硝氮、氨氮、总氮产污负荷进行MQ回归，提炼回归方程。
应用推荐