中国农业科学 ›› 2013, Vol. 46 ›› Issue (15): 3293-3304.doi: 10.3864/j.issn.0578-1752.2013.15.025

• 研究简报 • 上一篇    

亚低温下水分对番茄幼苗干物质积累与养分吸收的影响

 徐菲1, 李建明12, 吴普特12, 张大龙1, 赵志华1, 李俊1   

  1. 1.西北农林科技大学园艺学院,陕西杨凌 712100
    2.中国科学院水土保持研究所,陕西杨凌 712100
  • 收稿日期:2012-09-25 出版日期:2013-08-01 发布日期:2013-05-30
  • 通讯作者: 通信作者李建明,E-mail:lijianming66@163.com
  • 作者简介:徐菲,E-mail:xufei1125@126.com
  • 基金资助:

    国家“十二五”科技支撑计划项目(2011BAD29B01)、国家“863”计划项目(2011AA100504)

Effects of Water on Dry Matter Accumulation and Nutrition Absorption of Tomato Seedling Under Sub-Low Temperature

 XU  Fei-1, LI  Jian-Ming-12, WU  Pu-Te-12, ZHANG  Da-Long-1, ZHAO  Zhi-Hua-1, LI  Jun-1   

  1. 1.College of Horticulture, Northwest A&F University, Yangling 712100, Shaanxi
    2.Institute of Soil and Water Conservation of Chinese Academy of Sciences,Yangling 712100, Shaanxi
  • Received:2012-09-25 Online:2013-08-01 Published:2013-05-30

摘要: 【目的】揭示亚低温条件下水分对番茄幼苗氮钾营养元素吸收与分配的影响,为冬季温室番茄水肥科学管理提供依据。【方法】以番茄为材料,在温室内采用盆栽的方式,以适温( 18—30℃ )环境为对照,研究亚低温(4—20℃ )条件下,灌溉补充蒸腾蒸发量(ET) 分别为 60%、80%、100%和 120% 的水分对温室番茄幼苗干物质积累分配及养分吸收分配的影响。【结果】与适温相比,亚低温下番茄幼苗根、茎、叶干物质的积累量随着补充水分的减少逐渐降低,且处理时间越长降低得越多;干物质向叶片分配的比例减少,向根茎中的分配比例增大;亚低温下番茄幼苗植株中N、K的总含量降低,N总量随着补充水分的减少而减少,K总量在补充100% ET时最大;亚低温使番茄幼苗根茎叶中N的含量增加,K的含量降低;根茎中N的含量随着补充水分的减少而降低,叶片中N的含量在补充100% ET 时最高,根茎叶片中K的含量在补充60% ET时最高。亚低温下补充的水分小于80% ET时,根茎叶中N的积累量显著下降;随着处理时间的延长,N向叶片中的分配率降低,根茎中的分配率升高。随着生长时间的延长,番茄幼苗K向叶片中的分配率先降低后升高,根中的分配率大于适温下生长的番茄,且随补充的水分减少而逐渐升高。亚低温下补充100% ET水分叶片水势最大。【结论】在亚低温条件下补充100% ET水分有利于番茄幼苗干物质的积累以及对氮、钾元素的吸收。亚低温下番茄幼苗植株N的总量受水分影响较大,K总量受温度的影响较大。

关键词: 番茄 , 亚低温 , 水分胁迫 , 干物质积累 , 氮 ,

Abstract: 【Objective】 This study aims at discovering the effects of water on nitrogen and potassium nutrient absorption and distribution by tomato seedling growing at sub-low temperature, so as to provide a theoretical basis for nutrient management of greenhouse tomato cultivation in winter. 【Method】 With potted tomato plants in greenhouse as the experiment materials, and with the plants under normal temperature (18-30℃) and 100%ET as control treatment, the influences of supplement 60%, 80%, 100% and 120% of ET of irrigation amount on the nutrition absorption and the influence of the distribution in tomato under sub-low temperature (4-20℃) in greenhouse were investigated. 【Result】 Compared with the control treatment, dry matter accumulation in root, stem and leaf of tomato seedlings decreased with the decrease of ET water under sub-low temperature, and the longer the treatment time, the more reduction. The distribution proportion of dry matter in leaf decreased, but that in the stem and root increased. Under sub-low temperature the total content of N and K in tomato seedlings was lower than the control, the amount of N element reduced when the supplementary water dropped. The amount of K element was the highest with 100% ET of irrigation amount. The sub-low temperature increased the N content but reduced the K content in leaf, stem, and root. N content in the roots and stem reduced with the supplementary of water. N content in the leaf was the highest when 100% ET of irrigation amount was supplied, while that in the root and stem was the highest when 60% ET of irrigation amount was supplied. When the water supplied was less than 80% ET under low temperature, the accumulation of N in root, stem and leaf decreased significantly. As the treatment time prolonged, the distribution rate of N in the leaf was reduced, while that in the root and stem increased. When the growth time prolonged, the distribution rate of K in leaf decreased first but then rose. The distribution rate in root was larger than that in the control treatment, and rose when the supplementary water reduced. Under sub-low temperature, leaf water potential was the highest when 100% ET of water was supplied. 【Conclusion】 Under the sub-low temperature condition, supplying 100% ET water favors dry matter accumulation and absorption of nitrogen and potassium by tomato seedling. Total nitrogen is influenced greatly by water amount and total K is influenced greatly by temperature.

Key words: tomato , sub-low temperature , water stress , dry matter accumulation , nitrogen , potassium