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Chinese Journal of Applied Ecology ›› 1998, Vol. 9 ›› Issue (2): 139-144.

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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

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