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.
XU Jun xiang
,
XU Qiu ming
,
NI Xiao hui
,
CAo Bing
. Effect of Controlled-release Urea on Melon Yield,N Uptake and N Use Efficiency[J]. Acta Agriculturae Boreali-Sinica, 2009
, 24(3)
: 215
-218
.
DOI: 10.7668/hbnxb.2009.03.045
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