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1)  soil NH_4~+-N content
铵态氮含量
2)  nitrate nitrogen concentration
硝态氮含量
1.
In order to study the water quality and response to influencing factors in typical watersheds of Three Gorges area between 2004 and 2005,the variation characteristics of nitrate nitrogen concentration were analyzed under heterogeneous landscape condition through continuous observation with method of dividing into sub-watersheds in Quxi watershed(the first-grade branch,located in Three Gorges).
为了解三峡地区典型农业流域水体水质状况以及对流域各影响因素的响应,在2004年和2005年间,对三峡库区内长江一级支流曲溪的水体硝态氮含量进行了连续监测,利用划分子流域的方法,分析了该流域异质景观条件下溪流水硝态氮含量的变化特征。
3)  soil NO-3-N content
土壤硝态氮含量
1.
The effects of irrigation amount on grain quality,yield and soil NO-3-N content were studied with strong gluten wheat "Jimai 20" and middle gluten wheat "Taishan 23" by setting four irrigation amount treatments(with 0 mm,180 mm,240 mm,300 mm irrigation amount respectively) under field condition.
选用强筋小麦济麦20和中筋小麦泰山23两个品种,在大田条件下设置不灌水(0 mm)、灌水180 mm,240mm和300 mm 4个处理,研究了灌水量对籽粒品质和产量及土壤硝态氮含量的影响。
4)  critical nitrate N concentration(CNC)
硝态氮临界含量
5)  amino nitrogen content
氨基态氮含量
1.
The optimum technical condition was determined by detecting the amino nitrogen contents in enzymatic hydrolysate of soybean protein isolated which was pH7.
通过测定大豆分离蛋白酶解液氨基态氮含量,确定中性蛋白酶水解大豆分离蛋白制备活性多肽的的最佳工艺条件:最适pH为7。
2.
By determining the amino nitrogen content of enzymolysis liquid, it could be concluded that the best conditions for the hydrolysis of chicken albumen were: substrate pH8.
通过测定蛋清酶解液氨基态氮含量,确定中性蛋白酶水解蛋清制备活性多肽的适宜条件为pH为8。
6)  ammonium nitrogen
铵态氮
1.
The comparative analysis of ammonium nitrogen and rapidly available potassium between meadow soil and yellow red soil of Mount Wuyi;
武夷山草甸土与黄红壤铵态氮和速效钾对比分析
2.
The response of dry matter accumulation,turgor pressure and photosynthetic rate in cucumber seedlings to nitrate and ammonium nitrogen;
黄瓜幼苗干物质积累、膨压及光合速率对铵态氮和硝态氮的响应
3.
Effects of different proportions of ammonium nitrogen and nitric nitrogen on the yield and quality of the tobacco;
铵态氮与硝态氮不同配比对烟叶产量和质量的影响
补充资料:铵态氮
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性质:以铵离子(NH4+)形态存在于土壤、植物和肥料中的氮素,常用符号NH4+—N表示。硫酸铵、氯化铵、碳酸氢铵、液氧、氨水都是铵态氮肥。土壤中的铵态氮可被土壤胶体吸附,呈交换性铵状态氮肥。土壤中的铵氮可被土壤胶体吸附,呈交换性铵状态存在,也可溶解在土壤溶液中,能直接被植物吸收利用,属于速效性氮素。通常土壤中铵态氮的含量为1.4~30mg/kg,在东北黑土中可达50 mg/kg以上。土壤铵态可通过硝化作用而转化为硝态氮,每吸收一个铵离子(NH4+),即产生一个氢离子(H+),形成的氨进入植物体内后与呼吸基质时产生的酮酸化合,生成多种氨基酸和酰胺,并进一步合成蛋白质。因此,正常生育的植物体内不存在游离的铵态氮。铵态氮肥是速效性肥料,可作基肥和追肥用。但由于铵盐中阴离子不同,应根据土壤作物、气候等条件选择适宜的铵态氮肥。如氯化铵,因含有氯离子,不宜用于盐渍土或忌氯作物。

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