文章摘要
吴昊,王奉博,王竞,顾晨,韩莹.海带水热碳化产物改良滨海盐碱土壤研究[J].,2019,59(4):343-349
海带水热碳化产物改良滨海盐碱土壤研究
Research on improvement of coastal saline-alkali soil by products from kelp via hydrothermal carbonization
  
DOI:10.7511/dllgxb201904003
中文关键词: 海带  水热炭  发酵液  土壤肥力
英文关键词: kelp  hydrochar  fermentation liquid  soil fertility
基金项目:国家自然科学基金资助项目(21876018).
作者单位
吴昊,王奉博,王竞,顾晨,韩莹  
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中文摘要:
      针对滨海盐碱土壤营养贫瘠的问题,利用海带水热碳化后的水热炭和水热碳化液改良土壤.水热炭最佳预处理工艺条件为温度50 ℃、洗涤时间5 min、料液比1∶10,经过此水洗工艺后的水热炭对种子发芽指数有明显的提升.水热碳化液经过5种不同方式发酵产生发酵液,确定流加10次的发酵液对土壤肥力提升效果最佳.结果表明:单独添加水热炭能明显提升土壤的速效氮、有效磷的含量,但是对速效钾的含量提升无明显作用,而单独添加发酵液可以同时提升土壤的速效氮、有效磷和速效钾的含量.通过考察土壤的蔗糖酶、脲酶和脱氢酶活性,说明水热炭和发酵液联合使用明显强于单独施用水热炭或发酵液的肥力效果.
英文摘要:
      Aiming at the problem of poor nutrition in coastal saline-alkali soil, hydrochar and hydrothermal carbonization liquid produced by hydrothermal carbonization of kelp are used to improve the fertility of soil.The optimum process conditions for pretreatment technology of hydrochar are as follows: temperature is 50 ℃, washing time is 5 min, and the ratio of solid to liquid is 1∶10. After the water washing process, the amendment of hydrochar can significantly increase the seed germination index. Fermentation liquid is generated from hydrothermal carbonization liquid via five different fermentation ways, and 10 times of liquid amendment exhibits the best soil fertility improvement effect.Results show that the addition of hydrochar alone can obviously increase the available nitrogen and phosphorus content of soil, whereas the improvement of available potassium content is negligible; however, the addition of fermentation liquid alone can simultaneously increase the available nitrogen, phosphorus and potassium content in soil. Based on soil enzymatic activities of sucrase, urease and dehydrogenase, it is found that the use of hydrochar or fermentation liquid alone shows weaker fertility effect than that when hydrochar is used in combination with fermentation liquid.
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