查询词典 nitrogen

To obtain the best nutritional quality, the optimum nitrogen application is 125.8kg/hm~2 under middle density, during different development stage, the best C/N value were respectively 1.35-1.40, 1.17-1.25, 1.02-1.03, 0.62-0.71, 1.55-1.72, 0.98-1.02.8, Consequently, to obtain the unification between high yield and good quality, under the conditions of this study the optimum plant density is 60000 plant/hm2, the optimum nitrogen application is 120kg/hm2 to 180kg/hm2 under this density, it was obtained that at five-leaf, seven-leaf, ten-leaf, silking, lid after silking and harvest stage, the best C/N value were 1.27-1.63, 0.80-1.38, 0.81-1.07, 0.62-0.90, 1.39-1.72, 0.98-1.17, respectively.

在各生育时期适宜叶片碳氮比值分别为：1.35～1.40、1.17～1.25、1.02～1.03、0.62～0.71、1.55～1.72、0.98～1.02。 8、综合各因素，要达到甜玉米高产优质的统一，本试验推荐种植密度为60000株/hm~2，中密度下适宜施氮量为120～180kg/hm~2，叶片碳氮比值在五叶展、七叶展、十叶展、吐丝期、吐丝后11天、收获期动态变化为：1.27～1.63、0.80～1.38、0.81～1.07、0.62～0.90、1.39～1.72、0.98～1.17。

In addition, based on the fact that phosphorus is usually the limiting nutrient for nitrogen fixers, a novel method named "nitrogen fixing bacterial growth potential" test, for evaluating limiting nutrients, was developed.

此外，根据固氮菌的主要限制性因子是磷这一特性，设计了一种被称为&固氮细菌生长潜力试验&的评价水体限制性营养因子的新方法。

The results have shown that for fodders containing different protein levels, the excretion of nitrogen and phosphor was the lowest (34.05%) when the crude protein reached 30%,and the excretion increased gradually otherwise;and for fodders containing different protein qualities,the excretion of nitrogen was the highest,fed with fish meal.

因此测定鱼类氮、磷排泄对研究养殖鱼类对氮、磷的日粮需要和养殖水域环境污染具有重要意义。许多学者从事了这一研究。草鱼作为我国重要经济养殖鱼类，有着较大的养殖面积。草鱼氮、磷排泄情况的研究在国内还未见报道，在国外，C.G。

The results have shown that for fodders containing different protein levels, the excretion of nitrogen and phosphor was the lowest (34.05%) when the crude protein reached 30%,and the excretion increased gradually otherwise;and for fodders containing different protein qualities,the excretion of nitrogen was the highest,fed with fis...

当粗蛋白水平为30%时，氮、磷排泄率最低(34.05%)，粗蛋白高于或低于此值时，氮、磷排泄率呈增加趋势；对不同蛋白质量组：鱼粉组氮排泄率最高，而磷排泄率在各组无显著差异。

Furrow irrigation pattern ; cotton yield ; water use efficiency ; nitrogen use efficiency ; coupling effect of water and nitrogen

沟灌方式；棉花产量；水分利用效率；氮素利用效率；水氮耦合效应

During the fracturing for low pressure and low permeability gas reservoirs, there are some main problems in conventional hydroxypropylguar - organic boron cross-linking system: Firstly, the water-lock damage to low pressure and low permeability gas formations by filter liquor; Secondly, the reason for alkali-sensitive damage in alkali-sensitive reservoirs is that conventional hydroxypropylguar - organic boron cross-linking fracturing fluids were cross-linked under alkaline environment, while the permeability of reservoirs is reduced greatly; Thirdly, the formation pressure is low, and the energy of flow back is not enough, at present, the main measure in oil fields is "injecting with liquid nitrogen", but this technique increased the cost of fracturing, making great troubles in operating, and leaving the liquid nitrogen also is a big problem.

在低压低渗透气藏的压裂改造过程中，常规羟丙基胍胶-有机硼交联压裂液体系存在的主要问题，一是压裂液滤液对低压低渗透气层造成的水锁损害；二是常规羟丙基胍胶-有机硼压裂液是在碱性条件下交联的，对碱敏性储层造成碱敏损害，降低储层渗流能力；三是地层压力低，压裂液返排能量不足，当前各油田采取的措施主要是&液氮伴注&技术，但是&液氮伴注&技术增加了压裂的费用，而且液氮存放也存在较大问题。

See from the physiological index:All the tomatoes seedlings,Which have Solution culture Lacks of nitrogen , phosphorus , potassium and iron,It's Chlorophyll content、soluble sugar content、proteid content、nitrate reductase activity are all less than that have fully solution culture,These results indicate that nitrogen , phosphorus , potassium and iron have grave implications for plant growth.

从各生理指标来看：叶绿素含量、可溶性糖含量、蛋白质含量、硝酸还原酶活性，缺氮、缺钾、缺铁、缺磷培养的番茄幼苗均低于完全液培养的。以上结果表明缺氮、缺磷、缺钾、缺铁对植物生长有严重的影响。

Microbial biomass carbon and microbial biomass nitrogen, respiration CO2 and mineralized nitrogen in plant straw fertilized soil were determined under laboratory incubation conditions of constant temperature and moisture based on field above- ground yields of intercropped sweet maize straw and white clover straw.

根据田间甜玉米／白三叶草套种各作物的秸秆产量，在恒温恒湿条件下进行室内培养，探讨秸秆不同方式还田后土壤微生物量碳、微生物量氮、呼吸产生的CO2和矿化产生的无机氮的变化规律。

Trees have adsorption, absorption of pollutants or impede the spread of pollutants, trees absorb SO2, nitrogen oxide, hydrogen nitrogen compounds, Cl, fluorine compounds and Hg, Cr, and other heavy metals.

树木具有吸附、吸收污染物或阻碍污染物扩散的作用，树木吸收SO2、氮氧化合物、氮氢化合物、Cl、氟化合物和Hg、Cr等重金属。

Product purpose:(1) calcium carbide (CaC2), organic synthesis of the basic raw materials, Cyanamid, chlor-alkali products, the main raw materials;(2) polyvinyl chloride, used for light industry, construction materials, agriculture, packaging, medicine , electronic equipment, cars, daily necessities;(3) caustic soda, used in paper making, leather processing and textiles;(4) hydrochloric acid, used in paper making, cleaning, rare earth, organic chemical raw materials, fuel , food leather, metallurgy and other industries;(5) lime nitrogen (CaCN2), used in the manufacture of containers of cyanide, cyanides, alkaline drug fertilizer, lime nitrogen particles, soil particles slow-release fertilizer to improve the main raw material;(6) double Cyanamid (H2CN2 2, melamine in raw materials, synthetic pharmaceuticals, dyes intermediates.

产品用途：（1）电石（CaC2），有机合成的基本原料，氰胺、氯碱类产品的主原料；（2）聚氯乙烯，用于轻工业、建筑材料、农业、包装、医药、电子设备、汽车、日用品；（3）烧碱，用于造纸、皮革加工和纺织业；（4）盐酸，用于造纸、清洗、稀土、有机化工原料、燃料、食品皮革、冶金等行业；（5）石灰氮（CaCN2），用于制造氰容器、氰化物、碱性药肥、颗粒石灰氮、土壤改良型缓释颗粒肥的主要原料；（6）双氰胺(H2CN22 ，三聚氰胺的原料，是合成医药、染料的中间体。

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。