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- Abstract Urea occurs ubiquitously in nature and acts as a rapidly available nitrogen (N) source for the growth of many organisms, including plants. 摘要 尿素普遍存在于自然界，其既是生物氮代谢的重要中间产物，也是易于被许多生物如植物利用的生长氮源。
- The high altitude areas were rich in organic matter, available nitrogen (N) and available (potassium) K contents and deficient in phosphorous. [方法]对湖北宣恩烟叶产区不同海拔的植烟土壤主要养分的含量状况进行分析。
- The available nitrogen and phosphorus contents in root rhizosphere were greater than those in bulk soil, while its content of the available potassium was lower. 根际碱解氮和有效磷含量高于非根际土壤，其速效钾含量却低于非根际土壤。
- Activities of polyphnol oxidase and urease have negative correlation with organic matter, available nitrogen, available phosphorus and available potassium. 而多酚氧化酶和脲酶活性与土壤有机质，氮、磷、钾的有效性呈负相关。
- MT's fermentation kinetics are steady and its alcohol tolerance is high, however, it will benefit from a balanced nutrient strategy especially in low available nitrogen musts with high potential alcohol. 摩的酒精发酵动力学的稳定和宽容是高的,但是它将从战略均衡的营养特别低酒精高潜力务必速效氮。
- The results showed that the index of organic matter, total nitrogen, total phosphorus, available Nitrogen, Phosphorus and Potassium in 16-year-old organic tea garden were higher than those of 10-year-old and 4-year-old. 结果表明，16年生有机茶园土壤在有机质、全氮、全磷、速效氮、速效钾等各项指标上均高于10年生和4年生有机茶园土壤。
- The experiments in pot culture were conducted to study the effects of Anaerobic Fermentation Residues (AFR) on nitrate accumulation in rape and available nitrogen in soil in order to provide new way for the comprehensive utilization of biogas engineering. 研究沼气发酵产生的厌氧发酵残余物 (沼液、沼渣 ,以下简称沼肥 )在培肥土壤过程中土壤速效氮的变化及对油菜硝酸盐含量的影响 ,为沼气综合利用提供新的理论和技术依据。
- As to the soil of tailing deposit, what it lacks most is the readily available nitrogen fertilizer which will be indispensable during land reclamation with the nitrogen-fixation vegetation planted. 尾矿库最缺乏的土壤营养元素为速效氮，土地复垦时应着重考虑施加氮肥或者种植固氮植物。
- The N0 value, available nitrogen, hydrolizable nitrogen, amino acid-nitrogen and mineralizable nitrogen had very significant positive relation with nitrogen absorption contents of maize. 土壤N0值、碱解氮、酸解总氮、氨基酸态氮、可矿化氮与玉米植株吸氮量间呈极显著正相关；
- Air consists chiefly of nitrogen. 空气主要由氮气组成。
- His eloquence did not avail against the facts. 他的雄辩在事实面前不起什么作用。
- Joe tried to pull the heavy cart, but to no avail. 乔想拉那部笨重的大车，但是拉不动。
- Nitrogen forms most of the Earth's air. 地球上空气的大部分成分是氮气。
- Nothing could avail the dying patient. 没有任何东西能挽救那个濒死者
- The lamp is full of gaseous nitrogen. 灯里充满了气体氮。
- Deodorants are available as aerosols or roll-ons. 除臭剂有喷雾装或滚抹装。
- Nitrogen forms about 78% of the earth's atmosphere. 氮约占地球大气的百分之七十八。
- The advice we got was of no avail. 我们得到的建议完全没用。
- Such a statement will not avail. 这样的声明没有什么用。
- The medicine did not avail against the disease. 这种药对这种病没有产生疗效。
