在甘肃省马铃薯主产区研究了控失尿素、腐植酸尿素、含锌尿素、聚能网尿素对马铃薯产量和经济效益的影响。结果表明，不同尿素品种在马铃薯上的肥效反应为控失尿素 ＞ 腐殖酸尿素 ＞ 聚能网尿素 ＞ 含锌尿素 ＞ 普通尿素。其中控失尿素一次性施入后马铃薯产量为33 611.11 kg/hm2，较不施肥处理增产63.6%；较普通尿素处理增产24.7%，肥料产量贡献率提高11.9%，新增净产值30.1%。

The effect of four types urea on yield and economic benefit of potato is studied in Gansu. The results shows that fertilizer efficiency of different new typs urea are different，efficiency of controlled urea ＞ efficiency of humic acid urea ＞ efficiency of amino acid urea ＞ efficiency of zinc urea ＞ efficiency of common urea. The yield under the treat of onetime application of controlled urea is 33 611.11 kg/hm2， which increased 63.6% compared with no fertilization. And the yield， contribution rate of fertilizer and economic benefit respectively improved 24.7%， 11.9% and 30.1% compared to the conventional application of common urea.

S532

农业部植物营养与肥料重点实验室开放基金“不同尿素品种在甘肃省玉米、马铃薯肥效反应”(APF2015030)。