ABSTRACT This study investigated the influence of leonardite on coastal saline soil YX1 (very slightly saline), YX2 (slightly saline) and YX3(strongly saline) with 0/10/30/50 g/kg addition dosage during the 81-day incubation. Changes of pH, electrical conductivity, soil texture, micromorphology, functional groups and mineral constituents of soil were discussed. Results showed that the application of leonardite enhanced the urea hydrolysis, increased the activities of urease and phosphatase in the coastal saline soil. The urease and phosphatase activity reached the maximum on the 8th incubation day. Leonardite raised C and N content in the soil colloid as well as the C/N value. However, leonardite had limited effects on the soil texture and mineral components during the incubation period. The application of leonardite would promote the activity of soil micro-organisms and relative enzyme to improve the soil ecosystem. It could benefit the amelioration of coastal saline soil, and provide the theoretical direction for agricultural production.

中文翻译：

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风化岩对滨海盐渍土改良的影响

摘要 本研究考察了风化钙对沿海盐渍土 YX1（微盐）、YX2（微盐）和 YX3（强盐）的影响，添加剂量为 0/10/30/50 g/kg，孵育 81 天。讨论了土壤pH值、电导率、土壤质地、微形态、官能团和矿物成分的变化。结果表明，风化粉的施用增强了尿素水解，提高了滨海盐渍土中尿素酶和磷酸酶的活性。脲酶和磷酸酶活性在培养第8天达到最大值。风化钙提高了土壤胶体中的 C 和 N 含量以及 C/N 值。然而，风化岩在潜伏期内对土壤质地和矿物成分的影响有限。风化钙的施用将促进土壤微生物和相关酶的活性，从而改善土壤生态系统。有利于滨海盐渍土的改善，为农业生产提供理论指导。