摘要： 采用基质盆栽试验研究了包膜尿素与普通尿素对甜瓜产量、氮素吸收和氮肥利用率的影响.包膜尿素-次性接触施肥于幼苗根部.结果表明:包膜尿素处理的甜瓜产量显著(P<0.01)高于常规施氮处理,增产19.2%-19-%;相比常规施氮,施用包膜尿素显著降低了果实硝酸盐含量(P<0.05);常规施氮处理的植株叶片叶绿素含量在追肥前后出现较大波动.而包膜尿素处理在甜瓜生长期间均比较稳定;甜瓜植株氮素吸收曲线与包膜尿素氮素释放规律吻合;施用包膜尿素较常规施氮提高氮肥利用率1.1～20.6个百分点.综上所述,施用包膜尿素能实现增产、提高氮肥利用率以及改善品质的目的,是一种有应用前景的新型肥料.

关键词: 甜瓜, 包膜尿素, 产量, 品质

Abstract: A pot experiment was conducted in order to investigate the effects of common urea and controlled2release urea under different conditions (with different dose and applied methods) on yields,quality,nitrogen uptake and N use efficiency of melon. Controlled2release urea (including 80 % S and 20 %L) was applied in touching placement way with by single basal application. The results showed that controlled2release urea can increase fruit yield,improve quality, heighten N use efficiency. Compared to common urea,applying controlled2release urea increased melon yield by 19. 2 % - 19. 4 %,decreased the content of nitrate in melon fruit,heightened N use efficiency by 1. 1 %. The chlorophyll fluctuation of leaf was small in the whole growing season with the treatment of controlled2release urea when compared to common ure2 a. The accumulation tendencies of dry weight and N uptake were very similar and could be described by ″ S″ curve,which was consistent with N release tendency of controlled release fertilizer. In sum,controlled2release urea is one kind of new fertilizer that has wide applied prospect.

Key words: Melon, Controlled2release urea, Y ield, N uptake, N use efficiency

中图分类号: 

• S145.6