中国水稻科学

中国水稻科学

• 研究简报 • 上一篇    下一篇

不同氮钾条件下水稻基因型氮、钾积累利用差异

李华; 杨肖娥; 罗安程   

  1. 浙江大学 环境与资源学院; 浙江 杭州 310029
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2002-01-10 发布日期:2002-01-10

Genotypic Difference in N and K Accumulation under Different N Sources and K Levels in Rice (Oryza sativa L.)

LI Hua; YANG Xiao-e; LUO An-cheng

  

  1. （Institute of Agricultural Chemistry; College of Natural Resource and Environmental Sciences; Zhejiang University; Hangzhou 310029; China）
  • Received:1900-01-01 Revised:1900-01-01 Online:2002-01-10 Published:2002-01-10

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摘要： 采用营养液培养法研究了不同氮源和钾水平对杂交稻及其父母本和常规稻氮、钾吸收和积累的影响。研究结果表明 ,3种氮源对水稻氮钾营养吸收、积累利用的影响程度与钾营养状况及水稻品种有关。与常规稻相比 ,杂交稻对硝态氮的营养特性具有明显杂种优势 ,硝态氮营养可有效地促进杂交稻钾的吸收、积累 ,且其营养特性与父母本密切相关。

关键词: 氮素, 钾素, 杂交水稻, 常规稻, 养分利用效率

Abstract:

Hydroponics experiment was carried out in greenhouse to study the accumulation and use efficiency of nitrogen and potassium in hybrid rice and its parent lines, and conventional rice supplied with three nitrogen resources, NO3-, NH4+, and NO3-+NH4+, and with three K supply levels.The results showed that nitrogen and potassium concentration and accumulation were different among four genotypes. Compared with conventional rice, hybrid rice had greater response to N sources at the high potassium level. The heterosis of hybrid rice is better demonstrated with NO3--N under high K supply level than either NH4+/NO3- or NH4+-N.

Key words: nitrogen, potassium, hybrid rice, conventional rice, nutrient use efficiency