nitrate n 中文意思是什麼
nitrate n
解釋
硝態氮-
The annual productive capacity of the major products are : 13. 8 thousand tons of melamine, 400 thousand tons of urea, 100 thousand tons of calcium carbide, 4000 tons of dicyanamide, 11 thousand tons of white carbon black, 10 thousand tons of edible liquid co2, 20 thousand tons of calcium cyanamide, 30 thousand tons of methanol, 10 thousand tons of formaldehyde, 50 thousand tons of n. p. k. compound fertilizer, 200 tons of guanidine nitrate and 500 tons dissolved acetylene. the calcium carbide is the fine quality product awarded by the state
主要產品生產裝置能力為：年產總氨28萬噸，實物尿素45萬噸三聚氰胺1 . 35萬噸精甲醇3萬噸食品二氧化碳1萬噸電石10萬噸石灰氮2萬噸雙氰胺4000噸溶解乙炔500噸甲醛5萬噸白炭黑1 . 2萬噸熱電廠裝機容量3 . 6萬千瓦，年發電3億千瓦時，供熱450萬吉焦耳機械廠年機加工量2000噸綜合廠復混肥5萬噸。 -
Management of n in agricultural ecosystem is one of the most essential factors for agricultural sustainability. injudicious use of nitrogen fertilizer has induced a crucial environmental problem, which includes volatilization of nox to the atmosphere, acid rain, induced leaching of soil nutrients, changes in the global n cycle, and nitrate pollution of groundwater
農田生態系統中長期單一、過量偏施化學肥料特別是化學氮肥，造成農產品品質下降，肥料利用率低，不僅增加了農業生產成本，還嚴重污染環境，已成為農業可持續發展的一個重要制約因子。 -
On the nitrate - n accumulated characteristics in deep soil layer of winter wheat field in taihang piedmont
太行山山前平原冬小麥田深層土體硝態氮累積特徵研究 -
Influence of nitrate - n space time differentiation to ch. cabbage nitrate content in black soil
黑土土壤硝態氮時空變異對蔬菜硝酸鹽含量的影響 -
In addition, the growth of phytoplankton could be influenced on by the ratio of nitrate and phosphate ( n / p )
磷可能是東海原甲藻及中肋骨條藻生長的限制因子。 -
Ii mercury nitrate n - hydrate
N -水合硝酸汞 -
When inadequate n was added, the chloroplast structure in mesophyll cell was damaged in ear leaf, the amount of carbohydrate decreased in mestome sheath, and excessive n - redistribution and n - transportation to grain from vegetative mass appeared, which resulted in earlier leaf senescence. excessive n application led to too high activity of nitrate reductase, excessive vigorous nitrogen metabolism and too much exhaustion of carbohydrate in ear leaf, which resulted in the lack of enough carbohydrate in the lower leaf, meanwhile, the expansive chloroplast grana lamellae in leaf mesophyll cell and starch grain without nuclear in mestome sheath cell was observed, which led to the decrease of chlorophyll content and photosythetic capacity in maize leaf, then the early senescence occured
氮肥用量不足導致穗葉葉肉細胞葉綠體結構性差，維管束鞘細胞碳水化合物累積減少，營養體氮素再分配率大而引起葉片早衰；而過量供氮則導致生長後期硝酸還原酶活性過高，氮素代謝過旺，消耗了大量碳水化合物，以致下位葉不能得到充足的碳水化合物供應而提早脫落，同時葉肉細胞葉綠體片層結構膨脹，呈「肉汁化」特徵，維管束鞘細胞澱粉粒大量消耗，無核澱粉粒出現，從而葉片葉綠素含量下降，光合能力降低而出現早衰。 -
However, except nitrate, the nitrogen concentration including nitrite, ammonia, don, pn and tn in spring 1998 were higher than those in autumn 1997, with the average concentration of 4. 9714. 65, 0. 67 ?. 20, 0. 7210. 30, 9. 2516. 88, 7. 3014. 42 and 22. 9 ? 0. 2 mol / dm3 in autumn, and 4. 5812. 39, 0. 70 + 0. 14, 2. 2611. 05, 9. 8814. 92, 7. 8816. 21 and 25. 318. 94 mol / dm3 in spring, respectively. the n / p ratio in autumn 1997 was 13. 217. 54 in average which a little lower than redfield ratio, nevertheless in spring 1998 the value was as high as 25. 6113. 0, much hi gher than redfield ratio. there shows a clear seasonal variation of phosphorus structure in two seasons, but the nitrogen structure almost unchanged
兩個季節海水中磷的結構變化明顯，秋季磷主要以pp （ 54 ）為主，而春季長江口營養鹽、石油烴對海洋生態系統影響及動力學研究主要以po4一p （ 51 % ）為主;兩季節氮的結構基本一致，溶解氮都以don為主，分別為40 %和39 % :秋季no3一n比例較春季略高（ 22 % ） ，而春季nh4一n比例較秋季略高（ 9 % ） 。 -
It is significant for reducing the product cost and improving the comprehensive property of the superabsorbent composite. using ammonium eerie nitrate and n, n ' - methylene - bis - acrylamide as an initiator and crosslink agent respectively, a superabsorbent composite is prepared by graft polymerization of acrylamide on starch at the presence of clay suspension, followed by hydrolyzing, washing, drying, grounding and filtering
本文以硝酸鈰銨為引發劑， n ， n -亞甲基雙丙烯酰胺為交聯劑，使澱粉、粘土接枝共聚丙烯酰胺，經過水解，洗滌，乾燥，粉碎制得粘土-澱粉接枝共聚丙烯酰胺的超吸水性復合材料。 -
Standard method for examination of nitrate in air of residential areas - reduction of the cadmium column - spectrophotometry of n - 1 - naphthyl ethylene diamine hydrochloride
居住區大氣中硝酸鹽檢驗標準方法鎘柱還原-鹽酸萘乙二胺分光光度法 -
We use time domain reflectometry ( tdr ) to simultaneously estimate volumetric soil water content, soil solution electrical conductivity, and soil nitrate concentrations in combination with porous ceramic cup solution samplers to follow no3 - n transport in soil exposed to different irrigation, fertilizer quota and temperature. the experiment was conducted with nondestructive soil colums
本研究中以原狀土為研究對象，利用時域反射技術隨時測定土壤含水量和電導率的特點結合多孔陶瓷杯抽濾技術，研究在不同灌水、施肥和溫度下硝態氮的變化。 -
Nitrate content of rape and coriander increased with higher nitrogenous fertilizer application and lower water supply. nitrogen leaching in the soil increased with higher nitrogenous fertilizer application and water supply in column and micro - plot experiments, especially on higher irrigation and higher nitrogenous fertilizer. there was little nitrogen leaching when n application was below 135 kg / hm2, but n use at a rate of 270 kg / hm2 increased nitrogen leaching in the soil
在一定的施氮量下，硝態氮的積累峰值隨著灌水量的增加而下移， 150mm灌水量下田區試驗和模擬土柱試驗0 100cm土體內硝態氮的積累峰值分別出現在0 30cm和50 70cm ； 250mm灌水量下分別出現在40 60cm和60 80cm ； 350mm灌水量下田區試驗中0 100cm土體硝態氮沒有出現峰值，而模擬土柱試驗在80 100cm則有明顯的積累。 -
It is a serious issue that water and nitrogen input rates are unreasonable high in vegetable production in china, which may increase nitrate accumulation in vegetable and ground water contamination. in result, these will be harmful to people ' s health. the objectives of this paper which based on column % pot and micro - plot experiments were to compare the effects of different water and nitrogen supply strategies on nitrogen leaching in the soil profile and nitrate accumulation in vegetable as a base for the n and water recommendations in vegetable production
針對蔬菜生產中水氮投入過量造成蔬菜品質下降、地下水硝酸鹽含量超標，水、肥資源的浪費以及給人體健康造成的潛在性威脅的實際情況，以油菜和芫荽為研究對象採用模擬土柱、盆栽和田間微區試驗相結合方法系統監測了蔬菜生育期內硝酸鹽含量的動態變化以及收獲后不同土層土壤硝態氮的殘留量，研究了水氮對蔬菜硝酸鹽累積的影響及對土壤硝態氮殘留的效應。
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