查询词典 nitrogen-free

Results show that microbial biomass carbon and microbial biomass nitrogen in fertilized soil peak in the first several days, and then decline. Incubating both sweet maize straw and white clover have the highest yield, maxima of 529.57 mgkg^(-1) and 75.50 mgkg^(-1) respectively. They also release respired CO2 the most among all treated soils. The best mineral nitrogen release is in white clover incubating, with a maximum of 29.81 mgkg^(-1) under a 26-day culture, and then keeping 1.60 times the control and reaching 2.48 times at 80-day culture. Sweet maize incubating has the least mineral nitrogen release. It is 13%~53% of the control under a 26-day culture, with a maximum of 7.51 mg kg^(-1). Soil nitrogen mineralization is insignificant under sweet maize incubating with urea in short-term.

研究发现，各施肥处理的土壤微生物量碳、微生物量氮均在培养前期出现峰值，后期平稳降低；甜玉米桔秆和白三叶草绿肥同时还田的土壤微生物量碳、微生物量氮在各培养时期均最大，峰值分别达529.57 mgkg^(-1)，和75.50 mgkg^(-1)，土壤呼吸产生的CO2最多；白三叶草绿肥单独还田有利于土壤无机氮的释放，培养第26d无机氮达到最大值，为29.81 mgkg^(-1)，之后一直在对照处理的1.60倍以上，第80d达到2.48倍；甜玉米秸秆单独还田不利于土壤无机氮的释放，培养的第26d至结束，甜玉米秸秆处理的无机氮为对照的13%~53%，最大为751 mgkg^(-1)；甜玉米秸秆配施尿素，短期内不利于土壤无机氮矿化。

Results show that microbial biomass carbon and microbial biomass nitrogen in fertilized soil peak in the first several days, and then decline. Intercropping Incubating both sweet maize straw and white clover have the highest yield, maxima of 529.57 mg·kg-1 and 75.50 mg·kg-1 respectively. They also release the most respired CO2 the most among all treated soils. The best mineral nitrogen release is in white clover intercroppingincubating, with a maximum of 29.81 mg·kg-1 under a 26-day culture, and then keeping 1.60 times the control and reaching 2.48 times at 80-day culture. Sweet maize incubatingintercropping has the least mineral nitrogen release. It is 13%~53% of the control under a 26-day culture, with a maximum of 7.51 mg·kg-1. Soil nitrogen mineralizatiomineralization is insignificant under sweet maize incubatingintercropping with urea in short-term.

研究发现，各施肥处理的土壤微生物量碳、微生物量氮均在培养前期出现峰值，后期平稳降低；甜玉米秸秆和白三叶草绿肥同时还田的土壤微生物量碳、微生物量氮在各培养时期均最大，峰值分别达529.57 mg·kg-1和75.50 mg·kg-1，土壤呼吸产生的CO2最多；白三叶草绿肥单独还田有利于土壤无机氮的释放，培养第26 d 无机氮达到最大值，为29.81 mg·kg-1，之后一直在对照处理的1.60倍以上，第80 d达到2.48倍；甜玉米秸秆单独还田不利于土壤无机氮的释放，培养的第26 d至结束，甜玉米秸秆处理的无机氮为对照的13%～53%，最大为7.51 mg·kg-1；甜玉米秸秆配施尿素，短期内不利于土壤无机氮矿化。

Influence of pretreatment process on nitrogen content of soybean protein fibre;2. Genotype differences of nitrogen content in cultivated rice seed.;3. Reasons affecting nitrogen content of lime nitrogen, which is produced by converter process is analyzed.

分析了转炉法生产石灰氮中影响石灰氮含氮量的原因，通过合理掺用催化剂、调整炉料细度、改造原料配料系统等方法，优化了生产工艺条件，稳定了炉料配比以及炉料的发气量，提高了石灰氮的含氮量，氮的质量分数稳定在22。

The observation and monitoring were carried out for one year. Improvements resulted from the project include suspended particles, transparency, concentration of chlorophyll A, total organic carbon, total nitrogen. Factors that did not show obvious improvement include electrical conduction, concentration of nitrate nitrogen, ammonia nitrogen, nitrous nitrogen, phosphate salts. Finally, factors that were influenced by environment include water level, temperature, pH, total phosphorus, chloride salts.

历经一年的试验，因设备投入而改善之因子为溶氧、浊度、悬浮固体、透明度、叶绿素a、总有机碳、总氮等7项，无明显变化之项目为导电度、硝酸盐氮、氨氮、亚硝酸盐氮、磷酸盐等5项，受环境影响因子为水位、水温、pH、总磷、氯盐等5项。

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。

According to nitrogen and phosphorus contents in grain, leaf and stem of wheat parent materials, 133 wheat parent materials were divided into nitrogen high-efficient parents, low-ability parents in absorbing nitrogen and nitrogen low-efficient parents and team were also divided into phosphorus lowefficient parents, phosphorus-wasted parents and phosphorus high-efficient parents, cluster analysis was adopted in the paper.

根据小麦亲本材料子粒、叶片和茎秆的氮、磷含量，采用聚类分析，将133份小麦亲本材料分成了氮高效、吸收氮能力差和氮低效3类，和磷高效、费磷和磷低效3类，同时还筛选出了7个氮素利用效率和磷素利用效率均较高的亲本。

Based on the Minqin oasis Daejeon cotton irrigation district, systems research and analysis of cotton under different irrigation water and nitrogen coupling effect, the main conclusions of the pilot study are as follows:(1) The coupling effect of water and nitrogen under different furrow irrigation patterns shows that water and nitrogen application rate increased in the three furrow irrigation patterns will help improve cotton yield, but FFI limit the effects of water and nitrogen play, AFI and CFI not significant differences in the effects of cotton yield.

试验研究取得主要结论如下：(1)不同沟灌方式棉花的水氮耦合效应研究表明，棉花产量效应表明，三种沟灌方式增加施氮量和灌水量均有利于棉花产量的提高，但FFI限制了水氮效应的发挥，AFI与CFI的棉花产量效应差异不显著。

Although effects of nitrogen fertilizer on nitrogen accumulation and nitrate reductase in tobacco leaf had been extensively studied, impacts of nitrogen fertilizer on flue-cured tobacco leaf nitrogen metabolism in dry land and paddy field were not well documented.

试验采用裂区设计，以硝态氮和铵态氮两种氮素形态为主处理、5个供氮水平为副处理，在大田条件下研究了水田与旱地烤烟在团棵、旺长、脚叶采烤、腰叶采烤和顶叶采烤等5个生育期烟叶的总氮浓度、硝酸还原酶和谷酰胺合成酶活性的氮肥效应。

But when it came to different summer-sown maize, the straw of normal summer-sown maize absorbed less nitrogen absorption than grain did, while the straw of high oil summer-sown maize absorbed more nitrogen absorption than grain did. This it to say, high oil summer-sown maize need more nitrogen, when use N2, the nitrogen redundance was not happened, not like normal summer-sown maize.

但就各器官来说，普通夏玉米和高油夏玉米高氮时的表现有差异，前者全年籽粒化肥氮吸收量低于秸秆，而后者高于秸秆，表明高油夏玉米需氮量多，高氮时没有发生氮素冗余，而普通夏玉米却发生了氮素冗余，致使吸收的氮更多地残留在秸秆中。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。