| Effects of combined application of biochar and organic fertilizer on maize yield and soil nutrients in saline\|alkali soils |
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| DOI：10.7606/j.issn.1000-7601.2026.02.22 |
| Key Words: maize biochar organic fertilizer saline\|alkali soil soil nutrients yield |
| Author Name | Affiliation | | GENG Weidong | Yili Kazakh Autonomous Prefecture Agricultural Technology Extension Station, Yining, Xinjiang 835000, China | | WANG Jinxin | Institute of Agricultural Resources and Environment, Xinjiang Academy of Agricultural Sciences, Urumqi, Xinjiang 830091, China | | LI Meining | Yili Vocational and Technical College, Yining, Xinjiang 835000, China | | ZHANG Dongmei | Yili Kazakh Autonomous Prefecture Agricultural Technology Extension Station, Yining, Xinjiang 835000, China |
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| Abstract: |
| In order to investigate the effects of combined application of biochar and organic fertilizer on maize yield and soil nutrients in saline alkali land, a single\|factor experimental design was adopted, with a total of five treatments: CK (traditional fertilization, N 226 kg·hm-2, P2O5 138 kg·hm-2, K2O 18.75 kg·hm-2), T1 (traditional fertilization + organic fertilizer 3.75 t·hm-2), T2 (traditional fertilization + biochar 2.5 t·hm-2+ organic fertilizer 3.75 t·hm-2), T3 (traditional fertilization + biochar 5.0 t·hm-2+ organic fertilizer 3.75 t·hm-2), T4 (traditional fertilization + biochar 7.5 t·hm-2+ organic fertilizer 3.75 t·hm-2). The results showed that: (1) The combination of biochar and organic fertilizer had a significant yield\|increasing effect, with yield\|increasing rates ranging from 8.77% to 16.41% for each treatment, with T4 treatment showing the most significant yield\|increasing effect (16.41%). T2 processing has the highest economic benefits, with a net profit increase of 711.94 CNY·hm-2 compared to CK. (2) In terms of reducing soil salinity and adjusting soil pH value, the application of biochar was more effective than the application of organic fertilizer alone. The soil desalination rate of the T3 treatment could reach 23.85%, and the pH was the lowest (7.64). (3) In terms of improving available nutrients, increasing organic matter and total nitrogen content, T4 treatment had the best effect, with hydrolyzed nitrogen, available phosphorus, available potassium, organic matter, and total nitrogen content reaching their maximum values, increasing by 38.41%, 122.03%, 47.96%, 42.84%, and 17.86%, respectively, compared to CK. In summary, the combination of 2.5 t·hm-2 biochar and 3.75 t·hm-2 organic fertilizer is most beneficial for improving yield and economic benefits. The combination of 5 t·hm-2 biochar and 3.75 t·hm-2 organic fertilizer can be used to reduce soil salinity and adjust pH value. The combined application of conventional fertilization with 7.5 t·hm-2 biochar and 3.75 t·hm-2 organic fertilizer is recommended for enhancing available nutrients and increasing organic matter and total nitrogen content. |
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