两种形态尿素氮肥在青菜上施用效果研究

Effect of Two Forms of Urea Nitrogen Fertilizer Pakchoi

以上海青为试验材料,研究在沙壤土条件下,用缓效氮素和普通尿素对上海青的肥料效应。结果表明:(1)上海青生物量随施用普通尿素用量的增加而增加,随施用缓效氮肥用量的增加而减少,处理4的上海青生物量最高;(2)上海青体内硝态氮含量都低于国家蔬菜熟食标准,符合国家蔬菜安全生产要求,随纯氮(N)用量的增加,上海青体内硝态氮积累也增加,以处理4的硝态氮含量较高;(3)不同氮肥处理所吸收氮的量都比空白高,对氮肥利用率最高是处理5,各处理间氮肥的利用率均有明显差异。本研究探讨通过普通尿素和缓效尿素处理,对上海青产量、硝态氮含量、肥料利用率等的影响,这对指导当地在上海青的生产过程中不同氮肥的合理施用有指导作用和实际意义。

With green vegetables as test materials, research in arid-belt conditions, slowly and with nitrogen ordinary urea fertilizer effect of green vegetables. Green vegetables biomass of ordinary urea production with the increase of the content of the increase, with the application of nitrogen fertilizer slowly decreased, but with （treat 4） green vegetables biomass in the highest. Green vegetables body nitrate in vegetables cooked food is lower than the national standard, national vegetable production safety requirements, with pure nitrogen （N） the increase of the content of the green vegetables body nitrate accumulation also increased to （treat 4） of nitrate in high. Different nitrogen absorbed by the amount of nitrogen treatment than blank high, the nitrogen use efficiency is highest （treat 5）, the nitrogen utilization efficiency between treatment all have obvious difference. This study discussed by ordinary urea gentle effect urea process, on Green vegetables yield and nitrate content, the influence of the fertilizer utilization ratio and so on, the guidance in the production process of Green vegetables local with different nitrogen fertilizer is used rationally guiding role and practical significance.