热带作物学报2018，Vol.39Issue(1)：1-5,5.DOI:10.3969/j.issn.1000-2561.2018.01.001
追施氮肥水平对菜用甘薯产量、品质及硝酸盐积累的影响
Effects of Additional Nitrogen Fertilizer Application Level on Yield,Quality and Nitrate Accumulation of Vegetable Sweet Potato
摘要
Abstract
The effects of different nitrogen fertilizer application amount after harvest on the yield,quality and nitrate content changes of vegetable sweet potato were studied based on the cultivar'Xu cai shu 1'.The results showed that with the increase of nitrogen fertilizer application,the protein and nitrate content of vegetable sweet potato increased significantly,and the content of flavonoids,vitamin C,total sugar,polyphenol increased first and then decreased,while the reducing sugar content decreased continuously.The highest yield could be achieved after an application of 225.0 kg/hm2 nitrogen fertilizer.Better quality could be achieved for 75.0 kg/hm2 and 150.0 kg/hm2 nitragen application.Nitrate content would increase after nitrogen fertilizer application,reaching the highest at 7th day and then reduced to the CK in about 11 days.The SPAD value was significantly correlated with the amount of nitrogen fertilizer application,protein and nitrate content,which indirectly reflected the nitrogen level.It meant that suitable application of nitrogen fertilizer would promote both the productivity and quality,and the leaves should be harvested enough interval after application of nitrogen fertilizer.Leaf color value could provide references for rational fertilization.关键词
菜用甘薯/产量/营养品质/硝酸盐/叶色值Key words
vegetable sweet potato/yield/nutrient quality/nitrate/leaf color value分类
农业科技引用本文复制引用
张小贝,朱国鹏,陈艳丽,刘永华,万玲,占雷雷,孙言博,黎明艳..追施氮肥水平对菜用甘薯产量、品质及硝酸盐积累的影响[J].热带作物学报,2018,39(1):1-5,5.基金项目
海南省星火产业带项目:优质富硒菜用甘薯周年生产技术示范与推广(No.HNXH201530) （No.HNXH201530）
海南省自然科学基金:海南富硒地区甘薯硒的富集能力、赋存形态及分布规律(No.20163067). （No.20163067）
