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以15N标记尿素及用其制成的有机-矿质材料控释尿素为供试肥料,探讨其在黑土水稻田上使用后水稻对N的吸收利用及水稻产量的变化。结果表明:控释尿素比普通尿素氮肥利用率提高了3.64%～19.92%,土壤中N的残留量增加6.37%～20.86%,可提高水稻产量8.66%～25.70%。
15N urea and its controlled-release organic-mineral controlled release urea were used as fertilizers to investigate the uptake and utilization of N and their changes in rice yield after being used on black soil paddy fields. The results showed that the content of controlled release urea increased 3.64% -19.92% compared with that of common urea nitrogen, the content of N in soil increased 6.37% -20.86%, and the yield of rice increased 8.66% -25.70%.