对彭阳县种植马铃薯控释氮肥与普通氮肥最佳施用比例试验研究，结果表明，控

对彭阳县种植马铃薯控释氮肥与普通氮肥最佳施用比例试验研究，结果表明，控释氮肥与普通氮比例为40∶60，即667 m2施氮肥39.0 kg（控释氮肥16.2 kg、普通氮肥22.8 kg）增产增收效果明显，产量最高，为2 017.0 kg/667 m2，增产544.6 kg/667 m2，增长36.99%，肥料产投比为1.85。实现目标产量1 700～1 800 kg/667 m2，一次性基施控释氮肥与普通氮肥（比例为40∶60）35～40 kg/667 m2，或直接施用控释氮肥35 kg/667 m2，产量与效益最佳。

对彭阳县种植马铃薯控释氮肥与普通氮肥最佳施用比例试验研究，结果表明，控释氮肥与普通氮比例为40∶60，即667 m2施氮肥39.0 kg（控释氮肥16.2 kg、普通氮肥22.8 kg）增产增收效果明显，产量最高，为2 017.0 kg/667 m2，增产544.6 kg/667 m2，增长36.99%，肥料产投比为1.85。 实现目标产量1 700～1 800 kg/667 m2，一次性基施控释氮肥与普通氮肥（比例为40∶60）35～40 kg/667 m2，或直接施用控释氮肥35 kg/667 m2，产量与效益最佳。

The results showed that the ratio of controlled-release nitrogen to common nitrogen was 40:60, i.e. 39.0 kg (16.2 kg of controlled-release nitrogen and 22.8 kg of common nitrogen) of 667 M2 had a significant increase in yield and income, the highest yield was 2 017.0 kg / 667 m2, 544.6 kg / 667 m2, an increase of 36.99%, and the ratio of fertilizer production and investment was 1.85. To achieve the target yield of 1700-1800 kg / 667 m2, 35-40 kg / 667 m2 of one-time basal application of controlled-release nitrogen fertilizer and common nitrogen fertilizer (40:60), or 35 kg / 667 m2 of direct application of controlled-release nitrogen fertilizer, the yield and benefit are the best.<br>