华北农学报Issue(6)：189-194,6.DOI:10.7668/hbnxb.2014.06.032
施氮量对鲜食型甘薯产量、品质及氮素利用的影响
Effects of Nitrogen Application on Yield,Quality and Nitrogen Utilization of Fresh-eating Sweet Potato
摘要
Abstract
To investigate the effects of nitrogen application on yield,quality and nitrogen utilization of sweet po-tato to provide a theoretical reference for the sweet potato nitrogen management. The effects of nitrogen application on biological index,yield,quality and nitrogen utilization have been studied in the pot experiment. The cultivar of fresh-eating sweet potatos(Longshu 9 and Yanshu 25) were selected as experimental materials. The results showed that the biological index such as vine length,branch number,length of internode,petiole length and so on were in-creased with the increase of nitrogen application. Appropriate nitrogen application could significantly increase the tu-ber yield,commodity rate and tuber number of per plant,and increase the tuber soluble sugar and Vc content. The tuber soluble protein,crude protein and nitrate content increased with the increase of nitrogen application. Simulated by a quadratic curve:the yields of fresh-eating sweet potato reach their maxima under 166 . 60 mg/kg ( Longshu 9 ) and 153. 13 mg/kg(Yanshu 25). The nitrogen accumulation increased with the increase of nitrogen application,ni-trogen uptake efficiency and nitrogen use efficiency decreased with the increase of nitrogen application,the differ-ence of cultivars on nitrogen uptake efficiency showed that short vine cultivar ( Longshu 9 ) less than long vine culti-var (Yanshu 25),but the difference of cultivars on nitrogen use efficiency showed that short vine cultivar (Longshu 9 ) more than long vine cultivar ( Yanshu 25 ) . Reduce nitrogen application could increase the nitrogen use efficien-cy of fresh-eating sweet potato significantly.关键词
氮肥/鲜食型甘薯/产量/品质/氮素利用Key words
Nitrogen/Fresh-eating sweet potato/Yield/Quality/Nitrogen utilization分类
农业科技引用本文复制引用
高璐阳,房增国,史衍玺..施氮量对鲜食型甘薯产量、品质及氮素利用的影响[J].华北农学报,2014,(6):189-194,6.基金项目
国家甘薯产业技术体系营养与栽培生理岗位项目(CARS-11-B-14) （CARS-11-B-14）
山东省薯类产业创新团队裁培与土肥岗位项目(SDATI-10-011-08) （SDATI-10-011-08）
