nh4

The NH4 + content changes with the growth stage differently between the two varieties .

NH4+含量随生育期的变化两品种间差异较大。

The substitution of NH4 - would be more complete under sufficient water .

水充足时NH4~+取代更彻底；

The amount of NH4 + - N release increased with the temperature rising .

随着温度的升高，NH4+-N的释放量增大。

Great removal efficiency on both NH4 + - N and BOD5 .

在颗粒污泥的形成过程中，对氨氮和BOD5都有很好的去除效果。

Contrast result analysis of the experiments of the transition and adsorption of NH4 + in porous medium

孔隙介质NH4~+迁移吸附实验结果对比分析

The NR activity in leaves remained low in NH4 + - N treatment alone .

而单一铵态氮处理下幼苗叶片的NR活性则一直维持偏低水平。

The freshly fixed NH4 came mainly from the mineralization of organic nitrogen in soil .

这部分增加的固定态按主要来自土壤有机氮矿化补充。

An investigation of Photoelectrochemical synthesis of ammonia ( nh4 + ) using tio_2 powder systems

TiO2粉末体系光电化学生成氨（NH4~+）的研究

The content of free total organic acids increased with the enhancement of NH4 + - N ratio .

而随着NH4+-N比例增加，半夏块茎中总有机酸呈现上升的趋势。

The groundwater is polluted to varying degree by NH4 + in Tianjin City .

天津市地下水不同程度地受到NH4+污染。

The organic matter , NH4 + - N , available N content have conspicuously increased ;

土壤有机质、铵态氮和速效氮含量有所增加；

Which could be alleviated or even eliminated by NH4 + - N.

NH4~+-N有利于改善花生的铁营养状况，可缓和甚至消除NO3~&N和HCO3~-引起的生理性缺铁。

Perfect removal efficiency of NH4 + - N was also obtained and the average removal efficiency was 96.5 % .

对NH4+-N也有较好的去除效果，平均去除率为96.5%。

But the concentration of NH4 + decreased to the very low level in 7-10 days after fertilizer was applied .

而田表水层中铵态氮浓度在施肥后第7&10天左右均降至很低水平。

In the acidic soil , high NH4 + concentration of long term may result in toxicity to plant roots .

酸性条件下，土壤中较长时间保持高浓度的NH4+，会对植物根系产生毒害作用。

Enhanced aeration can improve the removal of NH4 + - N and TN effectively .

局部强化曝气措施可以有效提高总氮和氨氮的去除率。

Langmuir equation could well reflect NH4 + adsorption reaction of soil , and correlation coefficients were highly significant .

采用Langmuir方程均能很好的反映各处理土壤对NH4+的吸附反应，相关系数均达极显著水平。

As the decomposition of organic nitrogenous , the concentration of NH4 + - N increased .

随着秸秆分解的程度加深，土壤中铵态氮的含量增加，土壤硝化势增强。

Characteristics of NH4 + transport during water infiltration and redistribution have been studied with the soil column destruction method .

利用土柱切割法研究（土娄）土水分入渗、再分布过程反应性溶质（NH4+）运移特征。

Crude protein was mainly made up of NH4 - N and 13 . 57 % free amino acids .

其中粗蛋白主要以铵态氮形式出现和13.57%游离氨基酸组成。

The ion NH4 derived from ammonia ; behaves in many respects like an alkali metal ion .

从氨中衍生而来的离子NH，其化学性质类似碱金属离子。

When the initial phosphate concentration was low , the influence of NH4 + - Nwas high .

当初始磷浓度越低时，化粪池废水中氨氮对磷酸铵镁结晶反应的影响较大。

However , researchers have just many studies for NH4 + relatively at present , gas phase ammonia is currently no studied .

但是，目前研究者仅针对水中NH4+研究的相对较多，而气相氨无人研究。

Study on Effects of Salinity and pH on NH4 + Release in East Chongming Tidal Flat Sediment

盐度和pH对崇明东滩沉积物中NH4~+释放的影响研究

The NH4 + - N desorption capacity of sandy soil increased after application of composite straw amelioration materials .

施入秸秆复合改良材料使沙质土壤对NH4+-N的解吸能力有所增加。

Aerobic and anaerobic ammonium oxidation rates increased with increasing NH4 + - N concentration in a certain range .

好氧氨氧化和厌氧氨氧化速率在一定范围内随NH4+-N浓度增加而增加。

NH4 diffusion speed was the factor controlling the NH4 adsorbing and desorbing rates .

穿过水膜的扩散速度控制NH4+的吸附一解吸速率；

NH3 and NH4 + - N concentration in the process of consistent and mutually influence each other .

NH3和NH4+-N浓度变化过程基本一致，并彼此相互影响。

The results indicated that both of low pH and NH4 + - N accelerated the vessel development in maize root .

结果表明：低pH和铵态氮都能促进玉米主胚根导管的发育；

It is also discovered that foreign nitrogen source ( NH4 ) 2SO4 can increase ethanol concentration in fermentation .

另外，添加外源氮源硫酸铵能够提高发酵液的乙醇浓度。