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作物学报 ›› 2014, Vol. 40 ›› Issue (03): 542-549.doi: 10.3724/SP.J.1006.2014.00542

• 耕作栽培·生理生化 • 上一篇    下一篇

耐低钾和钾高效型甘薯品种(系)的筛选及评价指标

唐忠厚1,2,张允刚1,魏猛1,陈晓光1,史新敏1,张爱君1,李洪民1,丁艳锋2   

  1. 江苏徐州 221131; 2南京农业大学农学院, 江苏南京 210095
  • 收稿日期:2013-08-06 修回日期:2013-12-14 出版日期:2014-03-12 网络出版日期:2014-01-16
  • 通讯作者: 唐忠厚, E-mail: zhonghoutang@sina.com, Tel: 0516-82028152
  • 基金资助:

    本研究由江苏省科技支撑计划项目(SBE2012336)，国家高技术研究发展计划(863计划)项目(2012AA101204)和国家现代农业产业技术体系建设专项(CARS-11-B-13)资助。

Screening and Evaluation Indicators for Low Potassium-Tolerant and Potassium Efficient Sweetpotato (Ipomoea batatas L.) Varieties (Lines)

TANG Zhong-Hou1,2,*,ZHANG Yun-Gang1,WEI Meng1,CHEN Xiao-Guang1,SHI Xin-Min1,ZHANG Ai-Jun1,LI Hong-Min1,DING Yan-Feng2   

  1. 1 Sweetpotato Research Institute, Chinese Academy of Agricultural Sciences / Xuzhou Sweetpotato Research Center, Jiangsu / Key Laboratory of Sweetpotato Biology and Genetic Breeding, Ministry of Agriculture, Xuzhou 221121, China; 2 College of Agronomy, Nanjing agricultural university, Nanjing 210095, China
  • Received:2013-08-06 Revised:2013-12-14 Published:2014-03-12 Published online:2014-01-16
  • Contact: 唐忠厚, E-mail: zhonghoutang@sina.com, Tel: 0516-82028152

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摘要：

甘薯植株生长和块根形成与钾营养吸收利用密切相关。本研究以31份不同类型优质甘薯品种(系)为材料, 利用长期肥料定位试验田2个钾肥水平处理(氮磷处理与氮磷钾处理), 探讨耐低钾与钾高效型甘薯材料的筛选及评价指标。结果表明, 该试验条件下, 不同甘薯品种(系)块根产量差异达显著水平(P<0.05); 供试材料的钾敏感指数变幅在0.40~0.98之间, 差异达显著水平(P<0.05), 经聚类分析, 可分为低敏感型、适度敏感型、敏感型和高度敏感型; 品种(系)两处理下钾累计量与钾浓度差异均达显著或极显著水平; 氮磷钾处理下, 块根钾利用效率与整株钾利用效率变幅分别为58.92~384.9 g g–1和42.03~ 165.52 g g–1, 品种(系)差异均达显著水平(P<0.05); 相关性分析显示, 不同甘薯材料间整株总钾累积量、钾浓度、产量性状指标、钾利用效率与钾敏感性间均有一定相关性。长期肥料定位试验田可用于不同钾营养效率甘薯品种(系)的筛选, 块根钾利用效率与钾敏感性可作为筛选耐低钾与钾高效利用型甘薯材料的2个主要指标。

关键词: 甘薯品种(系), 耐低钾, 钾高效, 筛选

Abstract:

Potassium (K) uptake and utilization are closely related to plant growth and storage root formation of sweetpotato. In this paper, 31 good quality sweetpotato varieties (lines), NP plot (treatment of nitrogen and phosphorus) and NPK plot (treatment of nitrogen, phosphorus and potassium) were used to screen low K-tolerant and K efficient sweetpotato varieties (lines) in a long-term fertilization plots. The results showed that there was a significant difference (P<0.05) among storage root yield of sweetpotato varieties (lines). The variation of K sensitivity index (relative root weigh, RRW) was from 0.40 to 0.98, with a significant difference (P<0.05). Varieties (lines) were divided into four types (low sensitive, moderately sensitive, sensitive and highly sensitive) by cluster analysis. There were significant differences of total K accumulation amount (TKAA) and K concentration under two treatments of varieties (lines). Under NPK treatment, K utilization efficiencies (KUE) of root and whole plant were from 58.92 to 384.9 g g–1 and from 42.03 to 165.52 g g–1 with significant difference between these materials (P<0.05), respectively. Correlation analysis showed that there were some correlations of TKAA, K concentration, root yield, KUE, and RRW among varieties (lines). It is a feasible method for screening different fertilization efficiency sweetpotato varieties (lines) through long-term fertilization experiment. KUE and RRW as two major indicators can be used for screening low potassium (K)-tolerant and K efficient sweetpotato materials.

Key words: Sweetpotato varieties (lines), Low potassium-tolerant, Potassium efficient, Screening

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