摘要： 采用田间试验研究了不同控释氮肥品种（脲醛、线型和S型包衣尿素）一次性基施对大白菜产量、氮肥利用率和品质的影响。与常规施氮措施中尿素300kg/hm²的施用量相比，脲醛、线型和S型包衣尿素的施氮量分别为300，240（减量20%）和225kg/hm²（减量25%），其中S型包衣尿素处理中的化学氮肥由33%的普通尿素和67%的S型包衣尿素均匀混合而成。结果表明：在大白菜上施用氮肥（有机肥和化肥）均会不同程度地增产，其中施用有机肥增产8.22%，在有机肥的基础上施用化学氮肥的增产效果不明显，普通尿素、脲醛、线型和S型包衣尿素分别增产1.15%，4.27%，4.62%和4.97%。有机氮的利用率为33.0%，在有机肥基础上施用化学氮肥的利用率降低，普通尿素的氮肥利用率不到1%，脲醛、线型和S型包衣尿素的氮肥利用率分别为8.9%，13.1%和8.4%。施氮对大白菜的品质影响不大，各处理的鲜菜硝酸盐和Vc含量差异不明显。

关键词: 大白菜, 脲醛, 包衣尿素, 产量, 品质, 氮肥利用率

Abstract: Field experiments were conducted to investigate the impacts of different controlled release fertilizer types with single basal application on yield,NUE,quality of Chinese cabbage(Brassica penkinensis.).Controlled release fertilizers included urea formaldehyde,linear and sigmoid coated urea.Comparing to conventional N application rate of 300kg/ha as urea,urea formaldehyde,linear and sigmoid coated urea were applied at rates of 300,240(20% reduction) and 225kg/ha(25% reduction) respectively,and in the treatment with sigmoid coated urea,applied chemical N fertilizer is a mixture including 33% of urea and 67% of sigmoid coated urea.The results showed that N application(organic manure or chemical N fertilizer) increased the yield of Chinese cabbage,organic manure addition resulted in 8.22% yield increase,however,on the basis of organic manure,the yield was not increased remarkably with chemical N fertilization,the yield with urea,urea formaldehyde,linear and sigmoid coated urea increased 1.2%,4.27%,4.62% and 4.97% respectively.NUE of organic manure was 33.0%,whereas,on the basis of organic manure,NUE decreased with chemical N fertilization,NUE with urea was lower than 1%,for urea formaldehyde,linear and sigmoid coated urea,NUE was 8.9%,8.4% and 13.1% respectively.N fertilization had negligible impact on quality of Chinese cabbage,no significant difference of nitrate and vitamin C content was observed among all the treatments.

Key words: Chinese cabbage, Urea formaldehyde, Coated urea, Yield, Quality, NUE

中图分类号: 

• S634.1