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应用生态学报 ›› 1998, Vol. 9 ›› Issue (2): 139-144.

• 研究论文 • 上一篇    下一篇

光照条件对土壤-植物系统氮素状况影响的研究

曾希柏1, 青长乐2, 谢德体2, 侯光炯2   

  1. 1. 中国农业科学院山区研究室, 北京100081;
    2. 西南农业大学资源环境学院, 重庆400716
  • 收稿日期:1997-01-13 修回日期:1997-04-10 出版日期:1998-03-25 发布日期:1998-03-25
  • 基金资助:

    四川省科委“八五”重大科技攻关项目

Effect of illumination on nitrogen status in soil plant system

Zeng Xibo1, Qing Changle2, Xie Deti2, Hou Guangjiong2   

  1. 1. Upland Research Center, Chinese Academy of Agricultural Sciences, Beijing 100081;
    2. Southwest Agricultural University, Chongqing 400716
  • Received:1997-01-13 Revised:1997-04-10 Online:1998-03-25 Published:1998-03-25

摘要: 应用盆栽试验,通过调节不同光照强度并控制其它条件相互一致的条件下,研究了光照条件对土壤植物系统N素状况以及作物(莴笋)产量的影响.结果表明,光照强度的改变会引起作物生长状况的相应变化,同时也导致土壤N素(NH4+-N、NO3--N)状况、作物吸收N量以及作物对N素吸收速度等的改变.在试验所处的光照强度范围内,光照较强时,则作物吸收N素的速度较快、吸收N量增加,且产量高,但土壤中相应的N素含量(NH4+-N、NO3--N)则只能维持在相对较低的水平;光照较弱时,则出现与此相反的情况.

关键词: 光照强度, 土壤N素, N素吸收, 缺铁, 亚适温, 番茄幼苗, 硝酸盐胁迫

Abstract: In a pot experiment, the effect of illumination intensity on soil nitrogen status and lettuce yield was studied. The results indicated that the change of illumination intensity can affect the growth of plant, the status of soil nitrogen (NH4+-N,NO3--N), and the Nuptake by plants. Within the range of tested intensity, the Nuptake and plant yield were increased with increasing illumination intensity, but the content of soil nitrogen (NH4+-N,NO3--N) was maintained at a relatively low level.

Key words: Illumination intensity, Soil nitrogen, Nitrogen uptake, iron deficiency, tomato seedlings, suboptimal temperature, NO3- stress