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园艺学报 ›› 2002, Vol. 29 ›› Issue (2): 149-152.

• 研究论文 • 上一篇    下一篇

钙素对叶用莴苣营养吸收和生长发育的影响

范双喜1;伊东正2   

  1. ( 1 北京农学院园艺系, 北京102206; 2 千叶大学园艺学部, 日本松户市271648)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2002-04-25 发布日期:2002-04-25

Effects of Calcium on Nutrient Absorption and Growth and Development ofLactuca sativa var. longifolia Lam. in Nutrient Film Technique Culture

Fan Shuangxi1 and Ito Tadashi2
  

  1. ( 1Department of Horticulture, Beij ing Agricultural College, Beij ing 102206, China; 2Faculty of Horticultur e, Chiba University,Matsudo 271648, Jap an)
  • Received:1900-01-01 Revised:1900-01-01 Online:2002-04-25 Published:2002-04-25

摘要: 采用NFT 栽培, 研究了叶用莴苣钙素与主要无机成分间的相互关系, 以及对叶用莴苣生长发
育的影响。结果表明, 缺钙胁迫引起叶绿素含量降低, 缘腐病发病率上升, 叶片干、鲜样质量降低。生长中后期, 特别是新生内叶易发生钙素营养失调症。营养液中钙浓度过高会降低钾、镁的吸收, 而对氮、磷吸收影响不大。提高营养液中NH4+ -N 比例会抑制钙吸收, 降低其有效性。

关键词: NFT 水培, 莴苣, 缺钙胁迫, 营养特性, 生长发育

Abstract: Mutual relations between calcium ( Ca) and other main elements and the effects of Ca on the growth and development of lettuce in NFT culture were studied. Results showed that Ca deficiency resulted in a reduct ion of
Chlorophyll, an increase in the incidence of tipbum and a decrease of both fresh and dry weigh, all these changes are the major reasons of low yield and bad quality. During the mid􀀁 and later growing period, Ca disturbance was easily appeared in inner leaves of plant. Assimilation of potassium ( K) and magnesium (Mg) was retarded by excessive Ca, while that of nitrogen ( N) and phosphor ( P) was little affected. Ca was less effect ive if the proportion of NH4+ -N in nutrient solution was increased.

Key words: Natrient film technique, Calcium, Lettuce, Nutrive peculiarity, Growth and development

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