白云石与哈茨木霉菌配施对酸性土壤pH和交换性能的影响

Effects of Dolomite and Trichoderma harzianum Additions on pH and Exchange Properties of Acidic Soil

    摘要
  • 摘要:
    目的 为探究改良剂对酸性棕红壤pH和阳离子交换性能的影响。
    方法 本研究设置白云石（D）和哈茨木霉菌（T）两种改良剂不同施用量（哈茨木霉菌用量水平为0、1.5、3 g kg−1，白云石用量水平为0、3、6 g kg−1），进行种植辣椒的盆栽试验，探究哈茨木霉菌与白云石对酸性棕红壤的改良效果。
    结果 在辣椒结果期，单施白云石处理相较对照处理土壤pH提高0.8 ~ 1.4个单位，提升效果随着白云石用量的增加而增加，交换性酸降低71.5% ~ 92.2%，交换性氢降低78.2% ~ 93.0%，交换性铝降低56.3% ~ 71.9%、交换性盐基离子总量提高19.3% ~ 40.4%，单施哈茨木霉菌处理相对照处理，交换性酸降低10.6% ~ 13.6%，交换性氢降低25.0% ~ 30.3%，交换性盐基离子总量提升18.3% ~ 29.4%，阳离子交换量提升4.9% ~ 13.5%，盐基饱和度提升27.9% ~ 34.1%。白云石（6 g kg−1）与哈茨木霉菌(3 g kg−1)共施处理相较其单施处理显著提升了土壤pH、交换性盐基离子、阳离子交换量和盐基饱和度。
    结论 添加白云石和哈茨木霉菌对提升酸性土壤pH，降低交换性酸含量，提高土壤阳离子交换性能有一定的积极作用，是有效的土壤改良剂。

     

    Abstract:
    Objective The aims were to investigate the effects of amendments on pH and exchange properties of acidic brown red soil.
    Method In this study, two kinds of amendments, dolomite (D) and Trichoderma harzianum (T), were set up with different application rates (the dosage levels of Trichoderma harzianum were 0, 1.5 and 3 g kg−1, and the dosage levels of dolomite were 0, 3 and 6 g kg−1). The pot experiment of pepper planting was carried out to explore the improvement effect of Trichoderma harzianum and dolomite on acid brown red soil.
    Result The results showed that the soil pH of single dolomite treatment increased by 0.8 - 1.4 units compared with the control treatment, and the effect increased with the increase of dolomite dosage, the exchangeable acid decreased by 71.5% - 92.2%, the exchangeable hydrogen decreased by 78.2% - 93.0%, the exchangeable aluminum decreased by 56.3% - 71.9%, and the total amount of exchangeable base ions increased by 19.3% - 40.4%. Compared with control treatment, the exchangeable acid decreased by 10.6% - 13.6%, the exchangeable hydrogen decreased by 25.0% - 30.3%, the total amount of exchangeable base ions increased by 18.3% - 29.4%, the cation exchange capacity increased by 4.9% - 13.5%, and the base saturation increased by 27.9% - 34.1%. The co-application of dolomite and Trichoderma harzianum significantly increased soil pH, exchangeable base ions, cation exchange capacity and base saturation compared with single application.
    Conclusion The addition of dolomite and Trichoderma harzianum has a certain positive effect on increasing the pH of acidic soil, reducing the contents of exchangeable acid, and improving the soil exchange performance. It is an effective soil amendment.

     

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