Journal of Integrative Agriculture ›› 2014, Vol. 13 ›› Issue (9): 2049-2060.DOI: 10.1016/S2095-3119(13)60692-9

• 论文 • 上一篇    

Effects of Chlorination on Soil Chemical Properties and Nitrogen Uptake for Tomato Drip Irrigated with Secondary Sewage Effluent

 LI Yan-feng, LI Jiu-sheng, ZHANG Hang   

  1. 1、State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, P.R.China
    2、National Center of Efficient Irrigation Engineering and Technolo gy Research-Beijing, Beijing 100048, P.R.China
  • 收稿日期:2013-09-24 出版日期:2014-09-22 发布日期:2014-09-24
  • 通讯作者: LI Jiu-sheng, Tel: +86-10-68786545, Fax: +86-10-68451169, E-mail: lijs@iwhr.com
  • 作者简介:LI Yan-feng, E-mail: liyf@iwhr.com
  • 基金资助:

    This work was financially supported by the National Natural Science Foundation of China (50779078 and 50909101).

Effects of Chlorination on Soil Chemical Properties and Nitrogen Uptake for Tomato Drip Irrigated with Secondary Sewage Effluent

 LI Yan-feng, LI Jiu-sheng, ZHANG Hang   

  1. 1、State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, P.R.China
    2、National Center of Efficient Irrigation Engineering and Technolo gy Research-Beijing, Beijing 100048, P.R.China
  • Received:2013-09-24 Online:2014-09-22 Published:2014-09-24
  • Contact: LI Jiu-sheng, Tel: +86-10-68786545, Fax: +86-10-68451169, E-mail: lijs@iwhr.com
  • About author:LI Yan-feng, E-mail: liyf@iwhr.com
  • Supported by:

    This work was financially supported by the National Natural Science Foundation of China (50779078 and 50909101).

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摘要： Chlorination is usually an economical method for treating clogging in drip emitters during sewage application. Appropriate assessment of the responses of soil and crop is essential for determining an optimal chlorination scheme. During 2008 to 2009, field experiments were conducted in a solar-heated greenhouse for tomato drip irrigated with secondary sewage effluent, to investigate the influences of chlorine injection intervals and levels on soil chemical properties and nitrogen uptake. Injection intervals ranging from two to eight weeks and injection concentrations ranging from 2 to 50 mg L-1 were used. A salinity factor and a nutrient factor were extracted from the pool of the nine soil chemical constituents using factor analysis method. The results demonstrated that chlorination practices increased the residual Cl in the soil, resulting in an increased salinity factor, especially for the frequent chlorination at a high injection concentration. Chlorination weakened the accumulation of nutrients factor in the upper soil layer. Nitrogen uptake of the tomato plants also was inhibited by the increased salinity in the upper soil layer caused by high chlorination levels. In order to reduce the unfavorable effect on soil chemical properties and nitrogen uptake, chlorination scheme with concentrations of lower than 20 mg L-1 was recommended.

关键词: chlorination , drip irrigation , soil chemical properties , nitrogen uptake , sewage effluent

Abstract: Chlorination is usually an economical method for treating clogging in drip emitters during sewage application. Appropriate assessment of the responses of soil and crop is essential for determining an optimal chlorination scheme. During 2008 to 2009, field experiments were conducted in a solar-heated greenhouse for tomato drip irrigated with secondary sewage effluent, to investigate the influences of chlorine injection intervals and levels on soil chemical properties and nitrogen uptake. Injection intervals ranging from two to eight weeks and injection concentrations ranging from 2 to 50 mg L-1 were used. A salinity factor and a nutrient factor were extracted from the pool of the nine soil chemical constituents using factor analysis method. The results demonstrated that chlorination practices increased the residual Cl in the soil, resulting in an increased salinity factor, especially for the frequent chlorination at a high injection concentration. Chlorination weakened the accumulation of nutrients factor in the upper soil layer. Nitrogen uptake of the tomato plants also was inhibited by the increased salinity in the upper soil layer caused by high chlorination levels. In order to reduce the unfavorable effect on soil chemical properties and nitrogen uptake, chlorination scheme with concentrations of lower than 20 mg L-1 was recommended.

Key words: chlorination , drip irrigation , soil chemical properties , nitrogen uptake , sewage effluent