氮的

The teatments of urea application rate reduced by 5%～15% and added compound nitrogen fertilizer synergists,the growth and nitrogen content of maize were not significat changed,and the total ~(15)N uptake and nitrogen uptake by maize were the same as CK_2 or increased a little.

氮素减量5%~15%时配施复合氮肥增效剂对玉米生长和含氮量影响不显著，15N和吸氮总量与不施增效剂的处理相当或有所提高。

N plus P addition gave some improved leaf N and P concentration, N ~ P ratio, and nutrient resorption efficiency.

氮、磷同添使叶片氮、磷浓度、化学计量比及其再吸收效率表现出不同程度的提高。

Pseudoacacia and Caragana were significantly (P.05) better than A. fruticosa in pH, lactate content and ammonia-N/total-N ratio, so that their fermentation quality was better. In addition, they were high in crude protein and low in neutral detergent fiber and acid detergent fiber, showing that they were abundant in nutritive components. A. fruticosa was the inferior silage in every evaluation in the experiment. The mixed silage of R. pseudoacacia and Caragana was the best, and the mixed silage with A. fruticosa was not recommendable. There were no obvious changes in the time before and after silaging in nutritive value of these three kinds of plants, it showed that the silage technology was good.

结果表明：刺槐、柠条青贮伺料在pH值、乳酸含量、氨态氮／总氮比值方面均显著地(P.05)好于紫穗槐处理，发酵品质良好，且粗蛋白含量高，中性洗涤纤维和酸性洗涤纤维含量低，营养价值高；而紫穗槐青贮品质在各项评定中均较差；在混合青贮中刺槐和柠条青贮混合品质最佳，与紫穗槐混合的两种混合饲料品质较差；刺槐、柠条、紫穗槐在青贮前后营养品质均无明显降低，青贮饲料品质等级均为良好，青贮效果较优。

Recently studies provided evidence for the presence of animal-like nitric oxide synthase and NADPH oxidases in plants.

最近的研究认为，在环境条件胁迫下，植物体也能通过类似哺乳动物体内NADPH氧化酶和一氧化氮合酶途径产生活性氧和一氧化氮。

Observation data were analyzed with focus on concentrations of nitrogen oxidants and nitrogen deposition flux.

本文对观测得到的数据资料进行分析，定量给出了农田生态系统大气氮化物浓度和氮沉降通量。

Table 2 Effects of nitrate/ammonium ratio in solution culture on the accumulation of oxalates of different forms in leaves

表2 硝态氮/铵态氮比例对叶片、叶柄和地上部不同形态草酸累积量的影响 mg/ plant， FW

The effective diffusivity of nitrogen in nitrided metal manganese at different temperature is computed by mathematic diffusion model.

在上述渗氮条件下，各试样的渗氮结果均可较好地用扩散模型反映其相关规律。

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速龙工业炉有限公司主要提供的产品有：井式气体氮化炉，真空脉冲氮化炉，井式渗碳炉，井式淬火炉，回火炉，真空炉，高频加热机，中频加热机，工业炉用电热丝，工业电炉配件，真空泵，金相试试验机，络氏硬度计，维氏硬度计等工业炉及相关配件。

Liquid nitriding utilizes molten cyanide salts and, as in gas nitriding, the temperature is held below the transformation range.

液体渗氮利用熔化的氰化物盐，就像气体渗氮，温度保持在低于转化范围内。

4 Mechanisms of the effects on yield and quality With the application of nitrogen, the chlorophyll content, NRase activity, photosynthesis rate, fluorescence parameters in the ear leaves of spring-sown maize and summer-sown maize were affected dramatically, which could affect the yield and quality of maize.

3.4 不同施氮水平产量和品质差异的生理学基础春夏玉米套作时，施氮处理显著影响春、夏玉米穗位叶叶绿素含量、硝酸还原酶活性、光合速率、荧光参数等，从而影响产量和品质。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷