总氮量的定义是水中各种形态无机和有机氮的总量。包括NO3-、NO2-和NH4+等无机氮和蛋白质、氨基酸和有机胺等有机氮,以每升水含氮毫克数计算。常被用来表示水体受营养物质污染的程度。其测定有助于评价水体被污染和自净状况。地表水中氮、磷物质超标时,微生物大量繁殖,浮游生物生长旺盛,出现富营养化状态。
4 常规性质检测[8] 采用pH计测定酸碱度;采用重量法(GB/72677.2-81)测定水分;采用凯氏定氮法测定总氮量(total nitrogen,TN);采用石蜡油—重铬酸钾氧化法总有机碳量(total organic carbon,TOC),计算C/N值. 腐熟剂:蘸着辣根吃牛排 1.
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... ammonia nitrogen氨氮;氨型氮,氨基氮 nitrogen content含氮量;总氮量 total nitrogen总氮,总氮量 ...
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棉花总吸氮量随著追氮量的增加而增加,但花铃期吸氮量占总吸氮量的比例呈下降趋势。
The total absorption of nitrogen increased with the amount of nitrogen topdressing, but the proportion of absorption nitrogen during the blooming period to total nitrogen were downtrend.
抽穗期施氮肥可提高小麦籽粒的全氮含量、总可溶性蛋白质量及游离态氨基酸与游离态赖氨酸量等。
Applying nitrogen fertilizer at heading stage could enhance contents of total nitrogen, total soluble protein, free amino acids and free lysine in wheat grains.
而由于稀土元素在先期脱氧中大量氧化,其脱氮效果较弱,稀土元素对熔敷金属的总含氮量的影响不显著。
The effect of Re element addition on the nitrogen content in the weld was insignificant due to the oxidization from the early deoxidization stage.
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