Fundamental Study for the Development of Soil Conditioning Agent from Lignin

木质素土壤改良剂开发的基础研究

• 批准号: 09460075
• 负责人: MESHITSUKA Gyosuke
• 金额: $ 7.17万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09460075/
• 关键词: Lignin; Soil conditioning agent; Aluminium ions; Acid soil; Forest; Alkaline-Oxygen treatment; Muconic acid structure; Sequestering metal ions; ラジカルスルホン化; アルカリ性酵素酸化; ラジカルスルフォン化

It is a serious problem for the reforestation of damaged area especially in the South East Asia that plant growth is extremely inhibited because of acidic soil. This is basically due to the high concentration of aluminium ions dissolved into the soil water from soil because of acidic condition . In the sound soil in the forest, humic substances in the surface soil may have a function to control the concentration of dissolved aluminium. In this research, new soil conditioning agents were tried to prepare from industrial lignin (kraft lignin) by alkaline-oxygen oxidation and radical sulfonation treatments.It was clearly confirmed that growth inhibition of radish root because of aluminium ions was completely removed by the addition of a modified lignin to the culture medium. Effect of aluminium ions of 5ppm, in which the growth of radish root is practically prohibited at pH4.5, was removed by 120ppm of alkaline-oxygen treated haft lignin.As far as the function mechanism of a modified lignin, it was interesting to note that adsorption of aluminium ions to the tip of root was inhibited by the addition of a modified lignin.

酸性土壤严重抑制植物生长，这对受损地区的重新造林是一个严重的问题，特别是在东南亚。这主要是由于酸性条件下，土壤中溶解到土壤水中的铝离子浓度高。在森林的健康土壤中，表层土壤中的腐殖物质可能具有控制溶解铝浓度的作用。本研究以工业木质素（硫酸盐木质素）为原料，通过碱氧氧化和自由基磺化处理，制备了新型土壤调理剂，并在培养基中加入改性木质素，彻底消除了铝离子对萝卜根生长的抑制作用。在pH 4.5条件下，5ppm铝离子对萝卜根的生长有抑制作用，120ppm碱氧处理过的木质素可消除铝离子对萝卜根生长的抑制作用，其作用机理是抑制铝离子在萝卜根尖的吸附。

项目成果

T. Yokoyama, Y. Matsumoto, G. Meshitsuka: "Reaction Selectivity Of Active Oxygen Species Produced by Oxygen-Alkali Oxidation Of a Phenolic Compound"J. Wood Sci. 44. 421-422 (1998)

T. Yokoyama，Y. Matsumoto，G. Meshitsuka：“酚类化合物的氧碱氧化产生的活性氧的反应选择性”J。