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| Effects of biochar on growth and yield of tomato under waterlogging |
| GAO Yang1,SHAO Guangcheng1*,CHEN Changren2,XU Wen3,LIU Zhengjun4,HUANG Doudou5 |
| 1. College of Agricultural Science and Engineering, Hohai University, Nanjing, Jiangsu 210098, China; 2. Hongze Lake Water Conservancy Project Management Office, Hongze, Jiangsu 223100, China; 3. The Ecological Environment and Water Bureau of Jiangbei New Area Management Committee, Pukou, Jiangsu 210043, China; 4. Huaian Water Resources Bureau, Huaian, Jiangsu 223200, China; 5. Jinping Street Office, Fenghua, Zhejiang 315500, China |
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Abstract To explore the possibility of applying biochar to alleviate crop waterlogging stress in agricultural production in southern China, soil column experiments were conducted,systematically studying the effects of different biochar application rate on morphological index, physiological index, yield and WUE(water use efficiency)of tomato suffering from waterlogging. The results showed that at 5% biochar application rate, except for the main root length, root tip number, root shoot ratio and chlorophyll fluorescence parameters, other morphological and physiological indexes were significantly increased, relative to the control. Biochar′s effect on tomato dry matter accumulation was more obvious, and when biochar application rate reached 3%, root dry weight and the total dry matter were greatly higher than the control, increased by 0.11 g·strain-1 and 2.37 g·strain-1, respectively. Biochar addition did not have a significant influence on tomato yield. Only when biochar was applied at the rate of 10%, the tomato yield was significantly higher than the control, while the increase in WUE reached 120%. Overall, 5% biochar application rate is more reasonable and economical, suitable for practical agricultural production.
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Received: 18 April 2019
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