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The result of study showed:1 The effect of some inorganic urea inhibitor enzyme indicated boracic acid inhibits the activeness of urea enzyme in soil well, delayed the speed of urea hydrolysis in the soil and decreased the volatilization of ammonia , boracic acid,can be chosen as a inorganic urea enzyme inhibitor.2 The effect of some organic urea inhibitor enzyme showed that the dissociative Humic Acids of turfy soil and weathered coal inhibit the activeness of urea enzyme in soil well.

室内模拟试验，对几种缓释氮肥的释氮研究表明，和其它几种氮肥相比，PCF和PSF的控氮时间都较长。 6。盆栽试验表明，PCF的释氮效果比其它缓释氮肥的要好，且在油菜生育的各个时期，释氮都较充足，是适合油菜的良好缓释氮肥。

As an innovative technology, biodenitrification had been widely studied and applied at home and abroad,it provides a feasible and forehanded way for the environmental denitrification.

生物脱氮作为一种新兴技术，已经在国内外开展了广泛的研究和应用，为环境领域的脱氮处理提供了一个实用而节能的新途径，因此，集中对生物脱氮技术在废气和废水中的应用进行了介绍，分别介绍了这两个方面的进展，并简单比较了各种技术的优缺点，还探讨了生物脱氮技术的今后发展方向。

Study on single-stage biodenitrification by immobilized cells;2. As an innovative technology, biodenitrification had been widely studied and applied at home and abroad,it provides a feasible and forehanded way for the environmental denitrification.

生物脱氮作为一种新兴技术，已经在国内外开展了广泛的研究和应用，为环境领域的脱氮处理提供了一个实用而节能的新途径，因此，集中对生物脱氮技术在废气和废水中的应用进行了介绍，分别介绍了这两个方面的进展，并简单比较了各种技术的优缺点，还探讨了生物脱氮技术的今后发展方向。

It was found that the homogeneous orientation tendency of azobenzene was a common phenomenon in the self-assembled films fabricated by electrostatic layer-by-layer dipping process of the side-chain azo polyelectrolytes and poly(diallyldimethyl ammonium chloride); substituents that link to azobenzene have influences on the orientation of azobenzene in self-assembled films,which could be attributed to charge interaction and dipolar interaction between the chromophores and the polycation substrates.

研究表明，侧链型偶氮聚电解质自组装膜中偶氮生色团普遍存在一定程度的沿面取向。偶氮生色团所带端基的类型对其在自组装膜中的取向程度有较大的影响，这主要取决于偶氮生色团与聚阳离子基底的电荷相互作用和极性相互作用等。

It was found that the homogeneous oriention tendency of azobenzene was a common phenomenon in the self-assembled films fabriemed by electrostatic layer-by-layer dipping process of the side-chain azo polyeleetrolytes and poly (diallyldimethyl armnonium chloride):suhstituents that link to azobenzene have influences on the orientmion of azobenzene in self-assembled films,which could be attributed to charge interaction and dipolar interaction between the ehromophores and the polycation substrates.

研究表明，侧链型偶氮聚电解质自组装膜中偶氮生色团普遍存在一定程度的沿面取向。偶氮生色团所带端基的类型对其在自组装膜中的取向程度有较大的影响，这主要取决于偶氮生色团与聚阳离子基底的电荷相互作用和极性相互作用等。

The result showed there existed significant differences among families in seedling growth, dry matter accumulation, leaf shape as well as root parameters at high and low nitrogen levels. Remarkable reduction in seedling height, dry matter accumulation, leaf and root parameters were observed under low nitrogen stress, whereas larger proportion of photosynthesis production was allocated into roots to promote nitrogen absorption. Family variation in seeding growth, leaf and root parameters were increased under low nitrogen stress in comparison with high nitrogen level, which would be benefit to discriminate superior L. chinense families with high nitrogen efficiency. Nitrogen efficiency of different L.

结果表明：不同氮素水平下，马褂木苗的生长、干物质积累、叶片和根系等性状皆存在显著的家系遗传差异；低氮胁迫将显著抑制马褂木苗叶片发育和根系生长，影响苗高生长和干物质积累，但低氮素水平下生产的光合产物则较多地分配至地下根系部分以促进对氮素的吸收利用；与高氮处理比较，低氮胁迫加大了苗木生长、叶片和根系参数等家系遗传分化，有利于鉴别高氮效率的马褂木优良家系。

Field experiment was conducted to investigate the effect of nitrogen application rate on fresh grass yield and quality of oat. The results showed that fresh and dry grass yield of oat "Baoluo" increased with the increment of N application rate from 112.5 to 135kg/hm^2. At the same time, content of crude protein, total phosphorus, total calcium and crude ash in dry grass were improved, but content of crude fibre was decreased.

田间试验表明，燕麦新品种&保罗&在施氮量为90~135kg/hm^2，的情况下，其植株鲜草和干草产量随着施氮量的增加而增加；干草中粗蛋白质、全磷、全钙、粗灰分含量随着施氮量的增加而提高，粗纤维含量则随着施氮量的增加而降低。

In order to increase the peak depth of nitrogen atoms during the nitrogen plasma ion implantation of Ti-6Al-4V alloy, the rare earth metal yttrium was used to increase the implantation and diffusion depth of nitrogen atoms. In the experiment, the yttrium ions were implanted under the voltage of 20 kV firstly, and then the nitrogen ions were implanted under 30 kV.

为了提高氮离子体浸没离子注入Ti-6Al-4V合金时氮原子的峰值深度，利用钇来增加氮在基体中的注入深度和扩散深度，先用20 kV的电压进行钇离子体浸没离子注入处理，然后用30 kV的电压进行氮离子体浸没离子注入处理。

WANG Lang-ping, TANG Bao-yin, WANG Xiao-feng, WANG Song-yan, LIU Ai-guo, TIAN Xiu-bo (National Key Laboratory of Advanced Welding Production and Technology, Harbin Institute of Technology, Harbin 150001, China)Abstract: In order to increase the peak depth of nitrogen atoms during the nitrogen plasma ion implantation of Ti-6Al-4V alloy, the rare earth metal yttrium was used to increase the implantation and diffusion depth of nitrogen atoms. In the experiment, the yttrium ions were implanted under the voltage of 20 kV firstly, and then the nitrogen ions were implanted under 30 kV.

为了提高氮等离子体浸没离子注入Ti-6Al-4V合金时氮原子的峰值深度，利用钇来增加氮在基体中的注入深度和扩散深度，先用20 kV的电压进行钇等离子体浸没离子注入处理，然后用30 kV的电压进行氮等离子体浸没离子注入处理。

When the plant N level was below 2%, the leaf starch accumulation kept stable, but the sugar content in leaf and starch content in lower layer leaf increased. When the plant N level was between 2. 0% and 2. 8%, the activity of SPS and leaf soluble sugar content were the greatest, which was favorable to the transportation of the accumulated matter from the leaf to the grain.

随植株氮水平提高，叶绿素总含量提高，但叶绿素b的提高速度快于叶绿素a；当植株叶片含氮率在2％以下时，随植株氮水平提高，水稻叶片淀粉积累不仅没有减少，相反叶片中的糖含量和下层叶的淀粉含量还有显著提高；当植株叶片含氮率在2.0％到2.8％的适宜水平时，叶片SPS酶活力和可溶性糖含量最高，有利于叶片中积累物质向籽粒转运。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。