查询词典 nitrogen cycle

With the increase of nitrogen fertilizer applied in field, the content of chlorophyll, soluble protein, ammoniac nitrogen and nitrate nitrogen in functional leaves increased, but the content of soluble sugar and starch declined.

硝态氮含量受到增镀营养的抑制外，功能叶片叶绿素、可溶蛋白、氨基态氮、可溶糖含量的积累也或多或少受到增按营养的促进。

So we understand to once and actually usually take place of the bad factory house adds plant egg white(soybean egg white etc. corn egg white) in the origin should be the milk powder of animality egg white, this is already the first floor to cheat and commit crime, dishonest at least, but the widespread phenomenon in the in view of the fact industry, and have no obvious side effect to the human body, therefore is connive;But the protein content in the original inferior product very low, unexpectedly meet more unscrupulous plant egg white raw material to provide a company, add three gather cyanotype An, result in as a result currently result;Here our for the time being imagining is the beperhaps havior of the supplier, perhaps is three deer companies have intention to add, the basic reason for add lies in a current Kai surname settle nitrogen protein measurement method can test an always organic nitrogen content, rather than the nitrogen content in the particular protein, therefore, the method blemish was fume by the cupidity the exploitation that the milk powder manufactories of heart speculate, make the false and inferior product deceive to reach to mark, because they know three chlorine cyanotype An toxicities are again very small, disguise a protein content to reach a mark in the examination, but they didn't thought of that the toxicity is pimping three chlorine cyanotype An exactly will bring serious Bi to baby kid to wet system stone calculus, we even can guess, other adults of three deers use a milk powder in must also imply in great quantities similar chemistry product, just the adult will not get instant results of is endanger by body.

那么我们了解一下，实际上经常发生的不良厂家在本应该是动物性蛋白的奶粉里添加植物蛋白，这已经是第一层欺骗和犯罪，至少是不诚实了，但由于是业内的普遍现象，且对人体无明显副作用，因此被默许；而本来劣质产品中蛋白质含量就很低，没想到遇到更缺德的植物蛋白原料提供商，添加三聚氰胺，结果造成目前后果；这里我们姑且想象也许是供应商的行为，也许是三鹿公司有意添加，添加的根本原因在于现行的凯氏定氮蛋白质测定方法只能测试总有机氮含量，而非特定的蛋白质中氮含量，因此，方法缺陷被利欲熏心的奶粉制造商们所投机利用，使伪劣产品蒙混达标，因为他们知道三氯氰胺毒性很小，又能在检测中伪装蛋白质含量达标，但他们就没有想到毒性很小的三氯氰胺却恰恰会对婴幼儿造成严重的泌尿系统结石，我们甚至可以猜测，其它三鹿的成人用奶粉中一定也含有大量类似化学制剂，只是成人不会立竿见影的受到身体危害。

Nitrogen hydrate samples were synthesized using liquid nitrogen and powder ice at 16 MPa and 253K. The confocal laser Raman spectroscopy was used to investigate the characteristics of nitrogen clathrate hydrates.

在253K和16Mpa的压力下，于实验室内合成了氮气水合物，用显微共焦拉曼光谱对其N-N和O-H键伸缩振动的光谱特征进行了研究。

Chemical nitrogen fertilizer applied was an absolutely necessarily technical and measure in red soil region for the purpose of improving quality of corm and wheat. The impact of chemical nitrogen fertilizer on quality of corm and wheat was better than that of organic nitrogen fertilizers.

为提高红壤旱地玉米和小麦子粒的品质，使用化学氮肥是一项必不可少的技术措施，同时化学氮肥对玉米和小麦子粒品质提高效果大于有机氮。

In this paper,the research history and status were summarized.The processes of soil nitrogen input,interior transformation and output,including litter return,fertilization,atmosphere desposition,ammonification nitrogen fixation,ammonification,nitrification,denitrification,plant uptake,NH 3 volatilization and NO 3- leaching,were introduced.Finally,the tendency of study on soil nitrogen...

本文综述了森林土壤氮素转化与循环的研究历程和现状；介绍了凋落物的归还、施肥、大气沉降、自生固氮、氨化、硝化、反硝化、植物吸收、NH3 的挥发、NO3 -淋溶等土壤氮素输入、转化和输出的途径和过程；最后从研究目标、研究方法、研究对象和研究内容 4个方面归纳了森林土壤氮素转化与循环的发展趋势。

The phytoplankton community was mainly composed of Cyanophyceae, Euglenophyceae, Bacillariophyceae, and Chlorophyceae, and the dominant species were Oscillatoria subtillissima, Dactylococcopsis irregularis, Euglena caudata, Melosira granulata, Cyclotella meneghiniana, Chlorella vulgaris, and Scenedesmus quadricauda. The main environmental factors affecting the distribution of phytoplankton species in July were ammonium-nitrogen, dissolved oxygen, water temperature, and total phosphorus, while those in September were pH, water temperature, dissolved oxygen, transparency, and total nitrogen. Water transparency and zooplankton were the main factors affecting the biomass of Cryptophyceae, Pyrrophyceae, and Bacillariophyceae; while nitrogen, phosphorous, and dissolved oxygen were the main factors affecting the biomass of Cyanophyceae, Euglenophyceae, and Chlorophyceae.

结果表明：调查期间共鉴定出浮游植物384种，隶属于8门，浮游植物密度范围为2.01×105～57.60×105 cells·L-1；群落组成以蓝藻、裸藻、硅藻和绿藻为主，主要优势种有细微颤藻、无常蓝纤维藻、尾裸藻、颗粒直链藻、梅尼小环藻、普通小球藻、四尾栅藻等；7月影响浮游植物分布的主要环境因子依次为铵态氮、溶解氧、水温和总磷，而9月的pH值、水温、溶解氧、透明度和总氮含量对浮游植物的分布产生影响较大；其中，透明度和浮游动物量是影响隐藻、甲藻和硅藻藻类生物量的主要环境因子，而蓝藻、裸藻、绿藻主要受水体氮磷营养盐浓度和溶解氧的影响。

The paper reviews home and overseas research works on exhumation and use of nitrogen-fixing resource, genetics engineering of nitrogen fixation, and biochemistry of nitrogenase and chemical modeling of biological nitrogen fixation, and describe the prospect of biological nitrog...

本文从固氮资源的发掘和利用、固氮的遗传工程以及固氮酶生物化学和化学模拟生物固氮三方面对国内外的研究进展进行了全面的阐述，并对生物固氮研究的前景进行了展望。

Highter nitrogen, potassium and magnesium levels decreased the absorber of nitrogen, potassium and magnesium.4 Mutual effects of N- K, N—Mg and K-Mg had positive compound effect on the yield and fecula contents of pumpkin when nitrogen, potassium and magnesium were at proper level.

氮—钾、氮—镁、钾—镁互作对南瓜产量和淀粉含量在适当水平表现为正互作效应，而在高水平下表现为负互作效应。

The soil had great population of bacteria, but the fungi quantity is excessive which may cause the multiplication of germina. As base-fertilizer, the slowed-release fatty had positive influence on soil fast-effect nutrient, but the organism quality is small, the soil enzyme activity with microorganism activity both low. Soil EC, total nitrogen, available nitrogen, available phosphorus and organic matters were significantly negative related to the soil pH. Soil total nitrogen was positive significantly related to soil available nutrient.

土壤中pH值与土壤EC值、土壤全氮、速效氮、速效磷、有机质含量呈显著负相关，土壤全氮含量与土壤速效养分含量有极显著正相关关系，而且土壤有机质含量与土壤速效养分之间也有相互促进的作用，所以土壤养分的平衡效果非常重要，有机肥处理后土壤养分全面，肥力较高。

In nitrogen and phosphorus mixed pollution water, in thewater that the concentration of nitrogen is 21mg/L and the concentration of phosphorus is155mg/L, Eichharnia crassipes and Hosta ventricosa can grow normally. In the water that theconcentration of nitrogen is 210mg/L and the concentration of phosphorus is 31mg/L, thephysiological indicators of Hosta ventricosa is good but the physiological indicators of Eichhomiacrassipes is worse than the other treatment and the root of Eichharnia crassipes was rot when itwas planted in the 7th day, and on the 11th day the plants wilt symptoms, it noted that thistreatment affected the growth of Eichharnia crassipes.

在氮磷复合污染的水体中，凤眼莲和紫萼玉簪在氮浓度21mg／L，磷浓度155mg／L水体中都能够正常生长，而在氮浓度210mg／L，磷浓度31mg／L水体中，紫萼玉簪生长正常，而凤眼莲的生理指标比在其它处理中要差，并且凤眼莲在种植的第7天出现根部腐烂，11天时植株枯萎的症状，说明氮浓度210mg／L，磷浓度31mg／L复合污染在一定程度上影响植物的正常生长。

The Master of Science degree program in Economics features a curriculum that is flexibl...

在经济学理学硕士学位的课程计划的特点是灵活而全面的方法，在理论和应用课程培训工作。

This module is used for constructing and visualizing 3D models.

该模块是用于建设和可视化的三维模型。