Effects of ozone-treated domestic sludge on hydroponic lettuce growth and nutrition

doi:10.1016/S2095-3119(17)61868-9

Journal of Integrative Agriculture ›› 2018, Vol. 17 ›› Issue (03): 593-602.DOI: 10.1016/S2095-3119(17)61868-9

收稿日期:2017-09-26 出版日期:2018-03-20 发布日期:2018-03-01

Effects of ozone-treated domestic sludge on hydroponic lettuce growth and nutrition

YANG Peng^{1, 2}, GUO Yan-zhi³, QIU Ling¹

¹ College of Agronomy, Northwest A&F University, Yangling 712100, P.R.China
² Agro-environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, P.R.China
³ Institute of Food and Nutrition Development, Ministry of Agriculture, Beijing 100081, P.R.China

Received:2017-09-26 Online:2018-03-20 Published:2018-03-01
Contact: Correspondence GUO Yan-zhi, E-mail: guoyanzhi@caas.cn; QIU Ling, E-mail: QL2871@126.com
About author:YANG Peng, E-mail: yp15926@163.com
Supported by:
The work was financially supported by the Special Fund for Agro-scientific Research in the Public Interest, China (20130310104), and the Key Technology R&D Program of Tianjin, China (12ZCZDNC09600).

摘要/Abstract

Abstract: Here, the ozone-treated domestic sludge was diluted up to four different multiples and utilized as a nutritional source for hydroponic lettuce growth. Additionally, lettuce was cultured using the modified Hoagland nutrient solution as a control. The effects of ozone-treated domestic sludge on lettuce growth and nutrition were studied. Results showed that the lettuce treated with modified Hoagland inorganic nutrient solution had increased leaf number, plant height, fresh weight and dry weight compared to those treated with the ozone-treated domestic sludge dilution (P<0.05). However, the lettuce cultivated with the 2-fold ozone-treated sludge dilution showed significantly higher (P<0.05) contents of chlorophyll, soluble sugar and ascorbic acid (Vc) compared to that treated with modified Hoagland nutrient solution. And the nitrate concentration in the lettuce cultured with the 2-fold ozone-treated sludge dilution was 53.93% less than that cultured with the modified Hoagland nutrient solution, which was a significant improvement (P<0.05). This study suggested that the 2-fold ozone-treated sludge dilution is optimal for lettuce hydroponic nutrient requirements.

Key words: domestic sludge , ozone , lettuce , growth characteristics , quality , hydroponic

. [J]. Journal of Integrative Agriculture, 2018, 17(03): 593-602.

YANG Peng, GUO Yan-zhi, QIU Ling. Effects of ozone-treated domestic sludge on hydroponic lettuce growth and nutrition[J]. Journal of Integrative Agriculture, 2018, 17(03): 593-602.

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Effects of ozone-treated domestic sludge on hydroponic lettuce growth and nutrition

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