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- The dynamics of soil nitrate nitrogen leaching and contamination of the groundwater in high-yield farmland 高产农田土壤硝态氮淋失与地下水污染动态研究
- nitrate nitrogen leaching 硝态氮淋溶
- Some commercial laboratories use periodic nitrate nitrogen tests as guides. 许多商业性的试验室已应用定期的硝态氮分析作为指导。
- The quantity of ammonia volatilization and nitrogen leaching losses were reduced by 54.0% and 32.5% in CRNF treatment than in urea. 控释氮肥处理的氨挥发量比尿素降低54.;0%25;氮淋失量降低32
- In many plants, including most tree crops, nitrate nitrogen does not usually occur in the leaves. 在一些植物中,包括绝大多数的木本作物,硝态氮并非经常存在于叶片中。
- Nitrate nitrogen removal from ground water by autotrophic denitrification in a packed bed reactor. 固定床自养反硝化去除地下水中的硝酸盐氮。
- We got the relative compound standard indeterminacy of nitrate nitrogen content in water,8. 采用酚二磺酸分光光度法对水中硝酸盐氮进行不确定度评定。
- Rhoads F M.A comparison of ammonium and nitrate nitrogen for cigar wrapper tobacco[J],Agron.J. 李智勇;刘思英;丁一;等.;氮肥种类和形态对烤烟生育及产质的影响[J]
- The same result was observed under hydroponic condition with nitrate nitrogen in which glutamate or serine was added. 水培条件下,以铵态氮或尿素等作唯一氮源时,荞麦中草酸含量远低于以硝态氮培养的;
- Blanched gourd did not show such a pattern.Low temperature storage appeared to be favorable for the control of nitrate nitrogen in veg... 低温处理有利于控制蔬菜中硝态氮的含量,但对可溶性总糖含量的影响却较小。
- In order to establish an easy,rapid and practical method of determination of nitrate nitrogen in quality controlled water,thymol was applied. 用麝香草酚法测定水中硝酸盐氮,并与标准方法酚二磺酸法进行对照,所测结果经统计学处理,两种方法无显著性差异,精密度、准确度等各项指标符合分析标准。
- The results indicated that adding DCD significantly increased ammonium content and decreased nitrate nitrogen content at the same time. 结果表明,添加DCD明显提高了相应处理的铵态氮含量,降低了硝态氮含量。
- Pot and water culture experiments were conducted to study the regulation effects of nitrate nitrogen on chromium toxicity to Brassica campestris L. 通过盆栽和水培试验,探讨了硝态氮对小白菜铬污染毒性的调控作用。
- Near infrared reflectance spectroscopy is being available for testing total nitrogen, ammonia nitrogen, nitrate nitrogen and moisture with high precision. 因此,可以用比重计法、电导仪法以及近红外光谱法快速预测畜禽粪便中的肥料成分含量。
- The measurement of nitrate nitrogen and nitrite nitrogen in seawater has such disadvantages as many disturbing components,long time,poor repeatability and accuracy. 水体中尤其是海水中硝酸盐氮的测定较繁琐,干扰物质多,分析时间长,重现性差,准确性不高。
- A large amount of nitrogen that is not absorbed by crops enters as nitrate nitrogen into soils of the aeration zone after nitrification by microbial processes. 大量的氮素没有被农作物吸收,经微生物硝化作用后,以硝态氮的形式进入包气带土体,使包气带土体普遍受到氮素不同程度的污染。
- Testing - Hole on the Nitrogen Leaching Loss in the Winter Wheat 冬小麦氮素渗漏淋失规律测坑研究
- Oxalate content in leaves of buckwheat seedlings cultured under hydroponic condition with ammonium nitrogen or urea as the only nitrogen source was much lower than that with nitrate nitrogen. 而乙醇酸与乙醛酸则显著提高其草酸含量,表明荞麦叶片草酸合成主要来自乙醇酸途径,而非来自抗坏血酸等途径。
- Keywords DMPP;transformation;nitrogen leaching;water environment; 迁移转化;氮素淋溶;水环境;
- This paper reports the effect of DCD in seedling stage to soil microorganism of bacteria,mold and actinomycetes,and the concentration changes of both ammonium nitrogen and nitrate nitrogen in soil. 实验研究了双氰胺在玉米苗期对土壤微生物细菌、霉菌和放线菌的影响,及对土壤中铵态氮和硝态氮贮量变化的影响。