| Effects of biochar with biogas slurry application on soil nutrient environment in tomato root zone |
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| DOI：10.7606/j.issn.1000-7601.2023.04.10 |
| Key Words: biochar biogas slurry soil nutrients tomato analytic hierarchy process |
| Author Name | Affiliation | | ZHENG Jian | College of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou, Gansu 730050, China
Gansu Province Key Laboratory of Biomass and Solar Energy Complementary Energy Supply System, Lanzhou, Gansu 730050, China
Northwest Collaborative Innovation Center of Low Carbon Town Support Technology, Lanzhou, Gansu 730050, China | | YANG Shaohong | College of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou, Gansu 730050, China
Gansu Province Key Laboratory of Biomass and Solar Energy Complementary Energy Supply System, Lanzhou, Gansu 730050, China | | SU Zhipeng | College of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou, Gansu 730050, China
Gansu Province Key Laboratory of Biomass and Solar Energy Complementary Energy Supply System, Lanzhou, Gansu 730050, China | | LIU Junyan | College of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou, Gansu 730050, China
Gansu Province Key Laboratory of Biomass and Solar Energy Complementary Energy Supply System, Lanzhou, Gansu 730050, China | | ZHANG Ping’an | College of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou, Gansu 730050, China |
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| Abstract: |
| Combining strong adsorption characteristics of biochar with green and organic characteristics of biogas slurry, this experiment was to investigate the effects of biochar application on retention of nutrients in the crop root zone during biogas slurry irrigation. The field trials were conducted during two seasons of 2019 and 2020. The experiment was performed by setting one conventional chemical fertilizer treatment (CF) and four biogas slurry\|biochar treatments of biochar concentration of 20%, and T0, T0.5, T1.0, and T2.0 treatments with biochar application rates of 0%, 0.5%, 1.0%, 2.0%, mass ratio. Analytic hierarchy process (AHP) was used to evaluate the soil environment. The results showed that at a concentration of 20%, the total nitrogen, nitrate\|nitrogen, ammonium\|nitrogen and organic matter contents of the soil in the root zone of tomato from 0 to 60 cm and the pH of the soil from 0 to 40 cm increased gradually with the amount of biochar applied. The total nitrogen, nitrate\|nitrogen, ammonium\|nitrogen and organic matter contents of the soil in the T2.0 treatment were higher than those in the other treatments. The results of the AHP on the soil nutrient environment quality of the tomato root zone under the combined application of biochar and biogas slurry showed that the order of the effects of each treatment on the soil nutrient environment quality in the root zone was: T2.0>T1.0>T0.5>T0>CF. Different biochar application rates combined with biogas slurry not only increased the soil nutrient content in the tomato root zone, but also improved the soil nutrient environment quality in the tomato root zone. Overall, T2.0 treatment had the best effects on increasing the soil nutrient content in the tomato root zone and improving the soil nutrient environment quality. |
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