2种氮源与双氰胺配施对温室芹菜氮素吸收和营养品质的影响  

Effects of 2 Kinds of Nitrogen Sources with DCD Application on Nitrogen Uptake and Nutritional Quality of Greenhouse Celery

作　　者：郭艳杰[1,2] 王小敏[1,2] 牛翠云 赵英男[1,2] 张丽娟[1,2] 李博文[1,2] 

机构地区：[1]河北农业大学资源与环境科学学院,河北保定071001 [2]河北省农田生态环境重点实验室,河北保定071001

出　　处：《水土保持学报》2016年第2期149-154,共6页Journal of Soil and Water Conservation

基　　金：国家科技支撑计划项目(2012BAD15B02;2015BAD23B01)

摘　　要：采用盆栽试验研究了2种不同氮源（尿素氮、农家肥氮）与硝化抑制剂双氰胺（DCD）配施后对温室芹菜氮素吸收和营养品质的影响。结果表明：尿素（Urea）和腐熟牛粪（Dung）分别与DCD配施在一定程度上均可促进芹菜产量的提高和品质的改善,减少土壤中硝态氮含量,降低芹菜体内硝酸盐累积,显著提高氮素利用率。与单施肥料相比,Urea＋DCD和Dung＋DCD可使土壤中铵态氮含量增加22.71%~92.97%,硝态氮含量降低12.28%~56.73%;可使芹菜茎、叶吸氮量分别增加29.24%~74.89%,30.89%~66.33%,地上部氮素利用率分别提高到16.85%和30.30%。同时,Urea＋DCD和Dung＋DCD还可促进芹菜产量和株高的增加,但差异未达到显著性水平（P〉0.05）。芹菜体内硝酸盐含量则分别降低37.05%,17.18%（茎）,25.21%和7.63%（叶）,并且还能显著提高芹菜中可溶性糖、蛋白质、游离氨基酸和Vc含量。综合比较可知,尿素和DCD配施在减少氮素损失,降低芹菜体内硝酸盐含量以及提高营养品质方面的综合效果较佳。A pot experiment was carried out to study the effects of 2kinds of nitrogen sources（urea-N and dung-N）with DCD application on nitrogen uptake,yield and nutritional quality of greenhouse celery.The results showed that the 2different nitrogen fertilizers（urea and cow dung）with DCD application could improve the yield and nutritional quality of celery to some extent,decrease the content of nitrate in the soil and the accumulation of nitrate in the celery,and consequently reduce the nitrogen losses and improve the nitrogen utilization efficiency significantly.Compared with the single fertilizer treatments,urea and cow dung with DCD application could increase the content of ammonium by 22.71% to 92.97% and reduce the content of nitrate by12.28%to 56.73%.Meanwhile,the nitrogen uptake amounts in the stem and leaf of celery were increased by29.24%to 74.89%and 30.89%to 66.33%,respectively,and the nitrogen utilization efficiency of stem and leaf of celery were increased by 16.85%and 30.30%,respectively.Treatments of Urea＋DCD and Dung＋DCD could also improve the yield and plant height of celery,but the differences were not significant（P〉0.05）.However,the contents of nitrate of celery were reduced by 37.05%and 17.18%in stem,and by 25.21%and 7.63%in leaf.In addition,the contents of soluble sugar,soluble protein,free amino and Vc were also increased significantly.Overall,the combined application of urea with DCD showed better effects in reducing nitrogen losses,decreasing nitrate accumulation in celery,and improving the nutritional quality of celery.

关 键 词：尿素 腐熟牛粪 芹菜 双氰胺(DCD) 氮素吸收 营养品质 

分 类 号：S626[农业科学—园艺学] S636.3