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300 kg/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225 kg/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。
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 300 kg/ha as urea, urea formaldehyde, linear and sigmoid coated urea were applied at rates of 300, 240（20% reduction） and 225 kg/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.
出处
《华北农学报》
CSCD
北大核心
2006年第3期41-45,共5页
Acta Agriculturae Boreali-Sinica
基金
北京市科委项目(955421700)
国家科技部攻关项目(2002BA516A03)
北京市科技新星项目(2005B37)
关键词
大白菜
脲醛
包衣尿素
产量
品质
氮肥利用率
Chinese cabbage
Urea formaldehyde
Coated urea
Yield
Quality
NUE
作者简介
曹兵（1970-），男，湖北公安人，助理研究员，在读博士，主要从事新型缓控释肥研究与开发工作。
