在甘肃省马铃薯主产区研究了3种新型尿素对马铃薯产量及氮肥吸收效率的影响。结果表明，在施N 225 kg/hm2条件下，与普通尿素比较，控失尿素可提高马铃薯产量18.01%，提高氮肥吸收效率23.4百分点；腐植酸尿素可提高马铃薯产量15.73%，提高氮肥吸收效率14.5百分点；力谋仕增效尿素提高马铃薯产量7.30%，提高氮肥吸收效率29.3百分点。

The effects of three new types of urea on potato yield and absorption efficiency of nitrogen fertilizer were studied in the main potato producing areas of Gansu Province. The results showed that compared with the conventional application of common urea， the controlled loss of urea could increase potato yield by 18.01% and nitrogen absorption efficiency by 23.4 percentage points compared with ordinary urea under the condition of N application of 225 kg/hm2， the potato yield and nitrogen absorption efficiency were increased by 15.73% and 14.5 percentage points respectively under the application of humic acid urea， the potato yield and nitrogen absorption efficiency were increased by 7.30% and 29.3 percentage points respectively under the application of Limoushi efficiency urea.

S532

甘肃省农业科学院农业科技创新专项计划(2017GAAS26)。