| Effect of biochar and humic acid on physical and chemical properties of saline\|alkali soil |
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| DOI：10.7606/j.issn.1000-7601.2020.06.17 |
| Key Words: saline\|alkali soil soil physical and chemical properties biochar humic acid combined application |
| Author Name | Affiliation | | HAN Jianhong | School of Energy and Environment, Inner Mongolia University of Science and Technology, Baotou, Inner Mongolia 014010, China | | SUN Yibo | School of Energy and Environment, Inner Mongolia University of Science and Technology, Baotou, Inner Mongolia 014010, China | | ZHANG Lianke | School of Energy and Environment, Inner Mongolia University of Science and Technology, Baotou, Inner Mongolia 014010, China | | WANG Weida | School of Energy and Environment, Inner Mongolia University of Science and Technology, Baotou, Inner Mongolia 014010, China | | LI Yumei | School of Energy and Environment, Inner Mongolia University of Science and Technology, Baotou, Inner Mongolia 014010, China | | SUN Peng | School of Energy and Environment, Inner Mongolia University of Science and Technology, Baotou, Inner Mongolia 014010, China |
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| Abstract: |
| In order to explore a new type of saline\|alkali soil amendment, corn and sunflower straws were selected to make biochar and humic acid. Five amendment types including corn straw biochar (A), mixed straw biochar (A1), humic acid (B), corn straw biochar + humic acid (AB), mixed straw biochar+humic acid (A21B), were mixed with the soil and also the original soil as CK.Then, the improvement of medium saline\|alkali index and fertility index were evaluated. The results showed that both biochar and humic acid improved soil salinity and fertility. The combined application of biochar and humic acid had more obvious effects on soil pH, electrical conductivity (EC), exchangeable sodium percentage (ESP), and soil nutrients. The effect of mixed biochar and humic acid (A21B) was the best. Compared with CK group, the soil pH of A21B group significantly decreased by 10.8%, while the EC decreased by 55.0%, and ESP decreased by 9.8%. The available K, P, N, and organic matter of A21B increased by 59.77%, 210%, 178%, and 180%, respectively. In summary, mixed application of biochar and humic acid had a significant effect on improving saline\|alkali soil. |
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