植物营养与肥料学报2013，19(6）：1494-1501 Journal of Plant Nutrition and Fertilizer
doi=10.11674/zwyf.2013.0626
甘薯叶光合特性与块根主要性状对氮素
供应形态的响应
唐忠厚"，2，李洪民，张爱君'，史新敏"，魏猛'，陈晓光'，丁艳锋（1中国农业科学院甘薯研究所，农业部甘薯生物学与遗传育种重点实验室，江苏徐州221131；
2南京农业大学农学院，南京210095）
摘要：为探明甘薯叶光合特性与块根主要性状对不同氮素形态供应的响应特点，以徐薯18为研究对象，在盆栽条件下，设置铵态氮、硝态氮和酰胺态氮3种氮素处理，研究不同形态氮素供应对甘薯叶光合特性、块根产量与品质性状影响的差异。结果表明，在移裁后30d和50d时，酰胺态氮处理叶片叶绿素含量（CCI)为最高，70d时，铵态氮处理的CCI最高；铵态氮处理显著提高叶片的光合速率与有效辐射(PAR）；氮素处理明显提高甘薯块根产量，其 0 高甘薯块根的淀粉率和蛋白质含量，而酰胺态氮处理增加可溶性糖和还原糖含量；铵态氮处理有利于增加甘薯淀粉最高粘度值（PKV）、崩解值（BDV）和回复值（CSV）.而硝态氮处理促进最低粘度值（HPV）和最终粘度值（CPV）的上升。
关键词：甘薯；氮素形态；叶光合特性；块根主要性状
中图分类号：S531;S143.1
文献标识码：A
文章编号：1008505X(2013)06149408
Responses of nitrogen supply forms on leaf photosynthetic characteristics
androotcharactersofsweetpotato
TANG Zhong-hou'-2, LI Hong-min', ZHANG Ai-jun', SHI Xin-min', WEI Meng",
CHEN Xiao-guang, DING Yan-feng
(I Sueet Potato Research Institute, Chinese Academy of Agricultural Sciences/Key Laboratory of Sueet Potato Biolog)
and Genetic Breeding, Ministry of Agriculture, Xuzhou, Jiangsu 221121, China; 2 College of Agronomy,Nanjing Agricultural University,Nanjing 210095,China)
ooasaaeieaaoeasosaroaeasae yield and quality of sweetpotato, a pot experiment was conducted with three nitrogen forms, NH,-N[(NH,),SO.) J, NO; -N(NaNO,) and CONH,-N(urea) using sweetpotato cv. Xushu18. The results showed the chlorophyll contents ( CCI) with CONH-N were the highest after 3O d and 5O d of planting, while CCI with the NH, -N was the highest in 7O d. The photosynthetic rate and photosynthetically active radiation (PAR) under the NH, -N treatment are the highest. The NHt -N treatment could promote more photosynthesis of sweetpotato leaves and the yield under the NH, -N treatment is higher than those of the NO; -N and CONH,-N treatments, increased by 10. 6% and 17. 2% , respectively. There are significant differences (P <0. 05) between the NH4 -N treatment and other treatments. Meanwhile, the starch content and protein content of sweetpotato roots under the NH -N treatment are the highest, while the soluble sugar content and reducing sugar content under the CONH-N treatment are the highest. The NH -N treatment promotes the values of peak viscosity , breakdown and consistence of
收稿日期：2013-01-29
接受日期：2013-05-06
基金项目：科技部“863"计划（2012AA101204）；农业部国家甘薯现代产业体系建设项目（CARS-11-07B）；江苏省科技支撑计划
（SBE201230424）项目资助，
作者简介：唐忠厚（1975一），男，安微似阳人，博士研究生，主要从事甘薯裁培生理与品质调控方面的研究。E-mail：zhonghoulang@sina.con