| 尚进,平清伟,盛雪茹,张健,李娜,王兵.玉米秸秆乙酸法水解液对盐碱土的改良效果研究[J].中国造纸学报,2025,(2):17-25 |
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| 玉米秸秆乙酸法水解液对盐碱土的改良效果研究 |
| Study on the Effect of Acetic Acid Hydrolysate of Corn Stalk on the Improvement of Saline-sodic Soil |
| 投稿时间：2024-12-28 修订日期：2025-03-09 |
| DOI：10.11981/j.issn.1000-6842.2025.02.17 |
| 中文关键词: 玉米秸秆 水解液 乙酸 生物质基盐碱土改良剂 |
| Key Words:corn stalk hydrolysate acetic acid bio-based saline-sodic soil amendment |
| 基金项目:辽宁省振兴人才培养计划（XLYC1802025）。 |
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| 中文摘要: |
| 探讨了在玉米秸秆乙酸法水解的过程中，水解温度对水解残渣、水解液和水解液固形物的理化性质的影响，以及水解液对盐碱土的改良效果。结果表明，在乙酸水溶液体积分数20%、固液比1∶10（g∶mL）、pH值=2.4和水解时间1 h的条件下，提高水解温度可促进水解液中糖类物质的积累，当水解温度140 ℃时，水解液中总糖（葡萄糖、木糖和阿拉伯糖之和）含量达到最大值7.34 g/L；当水解温度160 ℃时，纤维素、半纤维素和木质素的溶出率分别达28.65%、84.55%和16.77%。此外，水解液含有丰富有机质，且具有较低的pH值，将稀释100倍的水解液作为盐碱土改良剂，可有效降低盐碱土pH值、电导率（EC）和交换性钠百分比（ESP），增加土壤有机质含量（SOM）；3个培养周期后，盐碱土从中度盐化-钠质土转变为轻度盐化土，改良效果较显著。 |
| 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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