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【目的】评价SODm增效尿素在棉花产量和提高氮肥利用率的效果。【方法】采用田间小区试验,研究SODm增效尿素对棉花品质、产量、氮肥利用率的影响以及棉花在不同生育期吸收氮的差异。【结果】SODm增效尿素有明显的增产效果。在与普通尿素用量相同的情况下,可使棉花增产13.3%。SODm增效尿素施用量比普通尿素减少25%时也可以增加产量,棉花增产6.2%。无论是施普通尿素还是SODm增效尿素对棉花的品质影响都不大。SODm增效尿素与普通尿素施用量相同情况下,可增收3 403.6元/hm2;当SODm的施用量比普通尿素减少25%时可增收1 808.0元/hm2。【结论】SODm增效尿素可以促进棉花植株对肥料和土壤中氮素的吸收,增加产量,提高氮肥利用率。
【Objective】 To evaluate the effect of SODm synergistic urea on cotton yield and nitrogen use efficiency. 【Method】 Field experiments were conducted to investigate the effects of SODm-enhanced urea on cotton quality, yield and nitrogen use efficiency, and the differences in nitrogen uptake by cotton at different growth stages. 【Result】 SODm synergistic urea had obvious yield increase effect. In the same amount of urea and normal circumstances, can increase the yield of cotton 13.3%. Yields of SODm synergistic urea can also be increased by 25% compared to normal urea, with a 6.2% increase in cotton yield. Whether it is ordinary urea or SODm synergistic urea on the quality of cotton are not large. Under the same application rate of SODm synergistic urea and ordinary urea, an increase of 3 403.6 yuan / hm2; when the application rate of SODm 25% than ordinary urea can be increased by 1 808.0 yuan / hm2. 【Conclusion】 SODm synergistic urea can promote cotton plants to absorb nitrogen in fertilizers and soil, increase yield and improve nitrogen use efficiency.