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| Study on the Effect of Acetic Acid Hydrolysate of Corn Stalk on the Improvement of Saline-sodic Soil |
| Received:December 28, 2024 Revised:March 09, 2025 |
| DOI：10.11981/j.issn.1000-6842.2025.02.17 |
| Key Words:corn stalk;hydrolysate;acetic acid;bio-based saline-sodic soil amendment |
| Fund Project:辽宁省振兴人才培养计划（XLYC1802025）。 |
| Author Name | Affiliation | Postcode | | SHANG Jin* | School of Light Industry and Chemical Engineering， Dalian Polytechnic University， Dalian， Liaoning Province， 116034 | 116034 | | PING Qingwei* | School of Light Industry and Chemical Engineering， Dalian Polytechnic University， Dalian， Liaoning Province， 116034 | 116034 | | SHENG Xueru | School of Light Industry and Chemical Engineering， Dalian Polytechnic University， Dalian， Liaoning Province， 116034 | 116034 | | ZHANG Jian | School of Light Industry and Chemical Engineering， Dalian Polytechnic University， Dalian， Liaoning Province， 116034 | 116034 | | LI Na | School of Light Industry and Chemical Engineering， Dalian Polytechnic University， Dalian， Liaoning Province， 116034 | 116034 | | WANG Bing | School of Light Industry and Chemical Engineering， Dalian Polytechnic University， Dalian， Liaoning Province， 116034 | 116034 |
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| Abstract: |
| This study investigated the effects of hydrolysis temperature on the physicochemical properties of hydrolysis residues， hydrolysate， and solid in the hydrolysate during the acetic acid hydrolysis of corn stalk， as well as the soil improvement effects of the hydrolysate on saline-sodic soil. The results indicated that under conditions of acetic acid water-soluble liquid with volume fraction of 20%， a solid-liquid ratio of 1∶10 （g∶mL）， a pH value of 2.4， and a hydrolysis time of 1 h， increasing the hydrolysis temperature promoted the accumulation of sugars in the hydrolysate， with the maximum total sugar （including glucose， xylose， and arabinose） content of 7.34 g/L at 140 ℃； at 160 ℃， the solubility rates of cellulose， hemicellulose， and lignin reached 28.65%， 84.55%， and 16.77%， respectively. Additionally， the hydrolysate contained abundant organic matter and had a low pH value. When diluted 100-fold and used as a soil conditioner for saline-alkali soil， it effectively reduced the pH value， electrical conductivity （EC）， and exchangeable sodium percentage （ESP） of the soil， while increasing the soil organic matter content （SOM）. After three cultivation cycles， the saline-sodic soil transformed from moderately saline-sodic soil to slightly saline-sodic soil， demonstrating significant improvement effects. |
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