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作物学报 ›› 2012, Vol. 38 ›› Issue (09): 1728-1733.doi: 10.3724/SP.J.1006.2012.01728

• 研究简报 • 上一篇    下一篇

不同氮水平下多效唑对食用型甘薯光合和淀粉积累的影响

陈晓光1,2，李洪民1，张爱君1，史新敏1，唐忠厚1，魏猛1，史春余2,*   

  1. 1中国农业科学院甘薯研究所 / 甘薯生物学与遗传育种重点实验室, 江苏徐州221121；2山东农业大学 / 作物生物学国家重点实验室，山东泰安271018
  • 收稿日期:2011-12-16 修回日期:2012-04-20 出版日期:2012-09-12 网络出版日期:2012-06-04
  • 通讯作者: 史春余, E-mail: scyu@sdau.edu.cn, Tel: 0538-8246259
  • 基金资助:

    本研究由国家自然科学基金项目(31000689)和国家甘薯产业技术体系北方薯区栽培岗位资助。

Effect of Paclobutrazol under Different N-Application Rates on Photosynthesis and Starch Accumulation in Edible Sweetpotato

CHEN Xiao-Gang1,2,LI Hong-Min1,ZHANG Ai-Jun1,SHI Xin-Min1,TANG Zhong-Hou1,WEI Meng1,SHI Chun-Yu2,*   

  1. 1 Key Laboratory of sweetpotato biology and genetic breeding, Sweetpotato Research Institute, Chinese Academy of Agricultural Sciences, Xuzhou 221121, China; 2 National Key Laboratory of Biology, Agronomy College, Shandong Agricultural University, Tai’an 271018, China
  • Received:2011-12-16 Revised:2012-04-20 Published:2012-09-12 Published online:2012-06-04
  • Contact: 史春余, E-mail: scyu@sdau.edu.cn, Tel: 0538-8246259

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1605

被引次数

87

摘要： 在大田条件下，以北京553为试验材料，设置施低氮(N 120 kg hm–2)和施高氮(N 240 kg hm–2) 2个处理，每个处理下设置3个多效唑喷施浓度，研究不同施氮水平下喷施多效唑对食用甘薯光合特性和块根淀粉积累的影响。结果表明, 增施氮肥能够提高叶片叶绿素含量和光合速率，但减少干物质在块根中的分配率，降低块根淀粉积累速率，显著降低了单薯重、淀粉产量和鲜薯产量，降幅分别为8.0%、30.7%和20.5%；喷施多效唑可以提高叶片叶绿素含量和光合速率，促进碳水化合物向块根的运转，提高干物质在块根中的分配，提高淀粉积累速率，显著增加单薯重、淀粉产量和鲜薯产量，平均增幅分别为18.6%、32.5%和46.1%。说明在高氮条件下喷施多效唑对甘薯块根淀粉积累和产量的提高具有明显的调节作用。

关键词: 食用型甘薯, 多效唑, 氮肥, 淀粉积累, 光合特性

Abstract: A field experiment was conducted to study the effects on leaf photosynthesis, root tuber starch accumulation and yield in edible sweetpotato (Ipomoea batatas L. Lam cv. Beijing 553) with two nitrogen treatments (120 and 240 kg ha–1) and three paclobutrazol (PP333 ) spraying levels (0, 100, and 200 mg ha–1). The result showed that increasing nitrogen application boosted Pn and chlorophyll content, reduced dry matter allocation in root tuber and starch accumulation rate, and significantly reduced the fresh weight per lump of root tuber(by 8.0%) and the starch yield and root tuber yield (by 30.7% and 20.5%). Spraying PP333 improved Pn and chlorophyll content, accelerated the transportation of carbohydrate from leaf to root tuber and enhanced its allocation in root tuber, the starch accumulation rate, significantly the fresh weight per lump of root tuber (by 18.6%) and the yield of starch and fresh weight of root tuber(by 46.1% and 32.5%). It was indicated that both starch accumulation and yield could be regulated by PP333 under high nitrogen application rate.

Key words: Edible sweepotato, Paclobutrazol, Nitrogen fertilization, Starch accumulation, Photosynthesis

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