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应用生态学报 ›› 2004, Vol. ›› Issue (4): 667-672.

• 研究论文 • 上一篇    下一篇

氮和钙交互作用对番茄氮素吸收的影响

娄春荣1, 韩晓日2, 肖千明1, 孙文涛1, 邱卫文1, 付仲鑫3   

  1. 1. 辽宁省农业科学院土壤肥料研究所, 沈阳 110161;
    2. 沈阳农业大学土地与环境学院, 沈阳 110161;
    3. 辽宁省农业科学院植物保护研究所, 沈阳 110161
  • 收稿日期:2002-03-12 修回日期:2003-04-10
  • 基金资助:
    中国科学院知识创新重大项目(KZCX24134);中国科学院沈阳生态实验站基金资助项目

Interactive effect of N and Ca on N uptake by tomato

LOU Chunrong1, HAN Xiaori2, XIAO Qianming1, SUN Wentao1, QIU Weiwen1, FU Zhongxin 3   

  1. 1. Institute of Soil and Fertilizer, Liaoning Agricultural Academy of Sciences, Shenyang 110161, China;
    2. College of Land and Environment, Shenyang Agricultural University, Shenyang 110161, China;
    3. Institute of Plant Protection, Liaoning Agricultural Academ
  • Received:2002-03-12 Revised:2003-04-10

摘要: 以沈阳草甸土为栽培基质,采用二次D-饱和最优设计,进行番茄N、Ca两因素效应的盆栽试验.结果表明,在本试验条件下,番茄茎、叶、果实中氮素含量随生育期的进展而下降,氮肥对番茄果实中NO33--N含量影响呈直线正效应,但各处理番茄果实中NO33--N含量均不超过可生食标准.适量施用钙肥有利于控制果实中NO33--N含量.氮肥对番茄植株地上部分和果实中N含量影响均符合报酬递减律.氮肥和钙肥对番茄N素积累符合报酬递减律;番茄从开花期到果实膨大期属N素最大效应期.番茄叶片硝酸还原酶活性受氮素影响较大.N、Ca配合施用,有利于提高番茄叶片硝酸还原酶活性,钙素可降低硝酸还原酶活性.土壤中NO33--N含量和电导率EC值均随氮肥施用增加而提高.

关键词: 番茄, 氮肥, 养分吸收, 钙肥

Abstract: To study the effect of fertilizer N and Ca on tomato plant,a pot experiment was conducted with meadow soil in Shenyang.The results showed that under the experimental condition,the N contents in stems,leaves and fruits decreased gradually along with the growth stages.For all treatments,the NO33--N content in fruits,which was within the raw eatable standard,had a positive correlation to N fertilization level.Adequate application of Ca was useful to control the NO33--N content.The response of N contents in stems,leaves and fruits to fertilizer N and Ca was in line with the law of diminishing marginal returns.From flowering stage to fruit expanding stage,the response of fertilizer N was most activated.The nitrate reductase activity in leaves might be greatly affected by fertilizer N,while adequate Ca fertilization could decrease it.A combined application of N and Ca could promote the nitrate reductase activity. Both soil NO33--N content and electric conductivity (EC) were increased with the increasing amount of applied fertilizer N.

Key words: Tomato, Nitrogen fertilizer, Nutrient uptake, Calcium fertilizer

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