Chin J Plant Ecol ›› 2010, Vol. 34 ›› Issue (10): 1227-1235.DOI: 10.3773/j.issn.1005-264x.2010.10.012

• Research Articles • Previous Articles     Next Articles

Effects of coal-fired flue gas desulfurated waste residue application on saline-alkali soil amelioration and oil-sunflower growth

WANG Bin1, XIAO Guo-Ju2, MAO Gui-Lian3, YUE Zi-Hui1, XU Xing1,*()   

  1. 1College of Agriculture, Ningxia University, Yinchuan 750021, China
    2Research & Development Center for Application of New Technology, Ningxia University, Yinchuan 750021, China
    3College of Life Sciences, Ningxia University, Yinchuan 750021,China
  • Received:2009-12-09 Accepted:2010-03-05 Online:2010-12-09 Published:2010-10-31
  • Contact: XU Xing

Abstract:

Aims Coal-fired flue gas desulfurated waste residue (abbreviated as desulfurated waste residue) may be a feasible approach to improving saline-alkali soil. Our objective was to explore the effects of desulfurated waste residue application on saline-alkali soil amelioration and growth of oil-sunflower (Helianthus annuus).

Methods Based on field and pot experiments, we studied soil properties (including pH and total salt content), and plant eco-physiological traits (root length and volume, leaf cell membrane permeability and oxidative protection enzyme systems) from 2006 to 2008. The field experiment was carried on alkali soil of Xidatan, Pingluo, Ningxia, and the desulfurated waste residue was added at ratios of 0, 11.25 × 103, 22.50 × 103, 33.75 × 103 and 45.00 × 103 kg·hm-2.

Important findings The application of desulfurated waste residue to alkali soil decreased soil pH, total salt content, oil-sunflower leaf cell membrane permeability and superoxide dismutase (SOD) activity and increased oil-sunflower root length and volume. Therefore, application of desulfurated waste residue can improve saline-alkali soil markedly and enhance the growth of oil-sunflower on such soil. The amelioration effect increased with time during the 3-year experiment period. Considering economic factors, the 11.25 × 103 kg·hm-2 treatment achieved the best amelioration effect.

Key words: coal-fired flue gas desulfurated waste residue, oil-sunflower, saline-alkali soil, soil amelioration