数字农科院2.0

生物炭配施黄腐酸对滨海盐碱地土壤理化性质、酶活性和多功能性的影响

文献类型： 中文期刊

关键词： 生物炭;;黄腐酸;;土壤理化性质;;土壤酶活性;;土壤多功能性

期刊名称：中国农业科学

ISSN： 0578-1752

年卷期： 2025 年

页码：

收录情况： 北大核心（2023版） ; ; CSCD（2025-2026年度） ; ; 科技核心（2024版） ; ; 农林核心（2024版）

摘要： Abstract: 【Objective】This study aimed to explore the effects of biochar combined with fulvic acid on the improvement of coastal saline-alkali soil and its influence on soil multifunctionality (SMF), providing the theoretical support for the scientific application of biochar and fulvic acid.【Method】Based on a three-year field experimental study, four treatments were set up in the coastal saline-alkali land, including (control (CK), single application of 30 t·hm-2 biochar (C1), single application of 0.15 t·hm-2 fulvic acid (H1), and combined application of biochar and fulvic acid (C1H1). The soil physical and chemical properties and soil enzyme activities in the 0-10 cm, 10-20 cm soil layers and rhizosphere soil were determined, and the soil multifunctionality was calculated based on the average value method.【Result】The results showed that the combined application of biochar and fulvic acid could significantly improve the physical, chemical and biological properties of soil. Compared with CK, the soil bulk density under C1H1 treatment at 0-10 cm and 10-20 cm soil layers decreased by 9.2% and 11.2%, respectively; the saturated soil moisture content increased by 11.3% and 9.8%, respectively; the total soil porosity increased by 12.6% and 12.8%, respectively; the soil pH value decreased by 4.4% and 3.9%, respectively; the soil EC value decreased by 19.9% and 22.8%, respectively; the soil SOC increased by 44.6% and 44.7%, respectively; available phosphorus (AP) increased by 48.3% and 44.8%, respectively; the availability of potassium (AK) increased by 45.3% and 43.3%, respectively. The enzyme activity analysis revealed that C1H1 had the most significant promoting effect on the carbon-nitrogen cycle-related enzymes (β-glucosidase, cellobiose hydrolase, leucine aminopeptidase), with an increase ranging from 23.4% to 47%. Under the combined treatment of biochar and fulvic acid, the SMF index had the greatest increase, rising by 77.5%. 【Conclusion】The combined application of biochar and fulvic acid significantly enhanced soil multifunctionality by improving the pore structure of coastal saline-alkali land and increasing nutrient availability and enzyme activity. Key words: biochar; fulvic acid; physical and chemical properties of soil; soil enzyme activity; soil multifunctionality

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