• ISSN 1008-505X
  • CN 11-3996/S
孙静悦, 袁亮, 林治安, 张水勤, 赵秉强, 李燕婷. 氧化/磺化腐殖酸对潮土中Cu、Zn、Fe、Mn有效性的影响[J]. 植物营养与肥料学报, 2019, 25(9): 1495-1503. DOI: 10.11674/zwyf.18466
引用本文: 孙静悦, 袁亮, 林治安, 张水勤, 赵秉强, 李燕婷. 氧化/磺化腐殖酸对潮土中Cu、Zn、Fe、Mn有效性的影响[J]. 植物营养与肥料学报, 2019, 25(9): 1495-1503. DOI: 10.11674/zwyf.18466
SUN Jing-yue, YUAN Liang, LIN Zhi-an, ZHANG Shui-qin, ZHAO Bing-qiang, LI Yan-ting. Effects of oxidized/sulphonated humic acid on the availability of Cu, Zn, Feand Mn in fluvo-aquic soil[J]. Journal of Plant Nutrition and Fertilizers, 2019, 25(9): 1495-1503. DOI: 10.11674/zwyf.18466
Citation: SUN Jing-yue, YUAN Liang, LIN Zhi-an, ZHANG Shui-qin, ZHAO Bing-qiang, LI Yan-ting. Effects of oxidized/sulphonated humic acid on the availability of Cu, Zn, Feand Mn in fluvo-aquic soil[J]. Journal of Plant Nutrition and Fertilizers, 2019, 25(9): 1495-1503. DOI: 10.11674/zwyf.18466

氧化/磺化腐殖酸对潮土中Cu、Zn、Fe、Mn有效性的影响

Effects of oxidized/sulphonated humic acid on the availability of Cu, Zn, Feand Mn in fluvo-aquic soil

  • 摘要:
    目的 研究比较改性腐殖酸对潮土微量元素有效性的影响及其作用机理,以期为开发提高微量元素有效性的专用腐殖酸功能材料提供科学依据。
    方法 采用土壤培养法,将腐殖酸 (HA)、氧化腐殖酸 (YHA) 和磺化腐殖酸 (SHA) 分别按30、100、300 mg/kg用量与干土混匀装入培养瓶中,调节含水量至田间持水量的60%,置于25℃人工气候箱中进行恒温培养,并保持土壤湿度恒定。分别在培养第3、7、15、30、60天取样,测定土壤有效铜、锌、铁、锰含量。
    结果 三种腐殖酸对土壤Cu、Zn、Fe、Mn有效性的影响大小依次为HA>YHA>SHA。施用30~300 mg/kg 腐殖酸 (HA) 可显著提高土壤有效铜含量,特别是在15~30天内,土壤有效铜含量提升幅度可达51.3%,明显优于氧化腐殖酸和磺化腐殖酸;施用三种腐殖酸30~300 mg/kg可在15天内增加土壤有效锌含量,其中以腐殖酸 (HA) 效果最好,土壤有效锌含量增幅可达11.8%~20.3%,优于氧化腐殖酸、磺化腐殖酸;30~100 mg/kg用量下,施用腐殖酸 (HA) 可在15天内使土壤有效锰含量提升5.6%,效果优于氧化腐殖酸和磺化腐殖酸,300 mg/kg用量下,磺化腐殖酸可使土壤有效锰含量提升13.6%;施用30~300 mg/kg的腐殖酸 (HA) 一周后,土壤有效铁含量提高4.3%~7.2%,磺化腐殖酸或氧化腐殖酸用量分别在30 mg/kg和300 mg/kg时可提高土壤铁有效性。
    结论 施用腐殖酸可显著提升潮土铜的有效性,但对潮土锌、锰、铁有效性的影响呈现出阶段性变化,不同结构腐殖酸对潮土微量元素有效性的影响差异较大,以HA对元素有效性的影响最大。因此,腐殖酸应用于提升微量元素有效性时,需考虑腐殖酸本身性质及施用时期等因素。

     

    Abstract:
    Objectives The paper studied the effects and acting mechanism of humic acids with different structures on the availability of micronutrient elements, which will help choosing proper humic acids to make functional specific fertilizers containing micronutrient elements.
    Methods Indoor thermostatic incubation method was adopted using fluvo-aquic soil as tested material. The tested humic acids included the original humic acid (HA), oxidized humic acid (YHA) and sulfonated humic acid (SHA), each of them was mixed with dry soil in ratio of 30, 100 and 300 mg/kg, respectively. The soil water content was adjusted to 60% of the field water holding capacity before loaded into a culture bottle. The treated soils were cultured at 25℃ inside an artificial growth chamber. Samples were taken at the 3rd, 7th, 15th, 30th and 60th day of culture to determine the available copper, zinc, iron and manganese contents.
    Results The effects of three humic acids on the availability of Cu, Zn, Fe and Mn in soil were in order of HA>YHA>SHA. 1) HA of 30–300 mg/kg significantly increased the available Cu content in the soil, especially within 15–30 days it was increased by 51.3%, significantly higher than YHA and SHA did. 2) The available Zn content in the soil increased within 15 days of culture, the increase by 30–300 mg/kg HA were 11.8%–20.3%, significantly higher than those by YHA and SHA. 3) HA increased the soil available Mn content by 5.6% within 15 days' culture, and the increase was higher than that by YHA and SHA. SHA increased available Mn by 13.6% when the application rate was 300 mg/kg. 4) After applying 30–300 mg/kg HA, the soil available Fe content was increased by 4.3%–7.2%, and the application of SHA or YHA increased the iron availability of the soil only at 30 mg/kg and 300 mg/kg, respectively.
    Conclusions The application of humic acid can significantly improve the availability of copper in fluvo-aquic soil, but the effect on the availability of zinc, manganese and iron in fluvo-aquic soil shows a phase change. The effect of different structure humic acids on the availability of micronutrient elements in fluvo-aquic soil is quite different. HA has the greatest influence on the availability of those elements. In view of this, when humic acid is used to enhance the availability of micronutrient elements, factors such as the nature of the humic acid and the application period should be considered.

     

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