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中国农学通报 ›› 2018, Vol. 34 ›› Issue (22): 37-44.doi: 10.11924/j.issn.1000-6850.casb18030120

所属专题: 园艺

• 林学 园艺 园林 • 上一篇    下一篇

番茄临界氮浓度模型的建立及氮素营养诊断

赵 薇,张治平,缪旻珉   

  1. 扬州大学,扬州大学,扬州大学
  • 收稿日期:2018-03-24 修回日期:2018-05-10 接受日期:2018-05-25 出版日期:2018-08-07 发布日期:2018-08-07
  • 通讯作者: 缪旻珉
  • 基金资助:
    扬州市“绿杨金凤计划”创业领军人才项目。

Establishment of Tomato Critical Nitrogen Concentration Model and Diagnosis of Nitrogen Nutrition

  • Received:2018-03-24 Revised:2018-05-10 Accepted:2018-05-25 Online:2018-08-07 Published:2018-08-07

摘要: 为构建鲜食番茄临界氮浓度稀释曲线模型,在此模型基础上建立氮素吸收模型和氮营养指数模型,对鲜食番茄氮营养状况进行诊断。试验分别于2016 年、2017 年以鲜食番茄‘苏粉14 号’为试验材料,设置了5 个施氮水平,研究鲜食番茄地上部生物量与氮浓度的动态变化。结果表明,鲜食番茄地上部生物量随氮肥施用量的增加而增加,氮质量分数随着生长发育时间而降低;鲜食番茄临界氮浓度与地上部生物量之间符合幂函数的关系,%Nc=3.7574DW-0.155,相关系数R2=0.8505。氮素吸收模型与氮营养指数模型可对鲜食番茄的适宜施氮量与氮素丰缺状况进行诊断,本试验条件下番茄适宜施氮量为270.92~281.79 kg/hm2。

关键词: 水产科研人员, 水产科研人员, 项目管理, 国家公派出国留学项目, 特征分析

Abstract: [Objective][Method]To investigate the dynamic changes between aboveground biomass and nitrogen concentration and establish the fresh tomato critical nitrogen concentration dilution curve model, fresh tomato (Lycopersicon esculentumSMill.) cultivar Sufen 14 was treated by five nitrogen application rates in 2016 and 2017. Based on the established critical nitrogen concentration dilution curve model, the nitrogen absorption model and nitrogen nutrition index model were constructed. Also, the appropriate nitrogen application scope was calculated based on tomato nitrogen nutrition diagnosis. [Result]Results showed that the aboveground biomass of fresh tomato increased with the increase of nitrogen application rate, while the nitrogen content declined with the growth and development time. The relationship between the critical nitrogen concentration of fresh tomato and the aboveground biomass was in accordance with the power equation, Nc=3.7574DW-0.155, the correlation coefficient R2=0.8505. [Conclusion]Nitrogen absorption model and nitrogen nutrition index model could diagnose the suitable nitrogen application rate and nitrogen abundance condition of fresh tomato. The suitable nitrogen application scope of tomato under this test condition was 270.92 kg/hm2-281.79 kg/ hm2.