| 夏晓雪,潘姗,余畅,李明艳,窦祺翔,刘新.生物炭协同耐盐作物提高滨海滩涂盐土有效磷含量[J].农业环境科学学报,2025,44(12):3190-3199. |
| 生物炭协同耐盐作物提高滨海滩涂盐土有效磷含量 |
| Biochar synergizes with salt tolerant crops to increase available phosphorus content in coastal mudflat saline soil |
| 投稿时间：2024-11-12 |
| DOI：10.11654/jaes.2024-1112 |
| 中文关键词: 滨海滩涂盐土 生物炭施用 耐盐作物 碱性磷酸酶 微生物多样性 有效磷 |
| 英文关键词: coastal mudflat saline soil biochar applications salt tolerant crops alkaline phosphatase microbial diversity available phosphorus |
| 基金项目:江苏省“碳达峰碳中和”科技创新专项资金项目（BE2022305）；江苏省林业科技创新项目（LYKJ〔2022〕02） |
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| 中文摘要: |
| 本研究旨在探讨生物炭与耐盐作物对滨海滩涂盐土中有效磷含量及土壤理化性质、微生物多样性的协同调控作用，明确盐土磷素活化的关键机制，以提升滩涂资源的利用效率。试验选取江苏盐城滨海滩涂区域，设置6个处理组，包括不施生物炭不种植耐盐作物的对照（CK）、施生物炭（BC）、种植耐盐作物[燕麦（ZW1）和高粱（ZW2）]以及生物炭与耐盐作物[燕麦（V1）和高粱（V2）]联合处理。通过田间试验，测定土壤的理化性质、微生物多样性、碱性磷酸酶（ALP）活性及有效磷含量，并采用冗余分析与偏最小二乘结构方程模型（PLS-SEM）解析各因素间的相互作用。结果表明：生物炭与耐盐作物联合处理（V1和V2）显著降低了土壤pH和EC，提升了含水率、孔隙度和阳离子交换量，分别使土壤有机质、全磷和有效磷含量提升了603.5%、447.5%和491.0%；微生物群落中，变形菌门丰度显著增加，与ALP活性（提高184%）呈正相关，是促进磷活化的关键菌群。PLS-SEM模型表明，土壤理化性质通过直接路径（路径系数0.693 1）和间接路径（微生物群落0.867 7和ALP活性0.082 9）共同调控有效磷含量。研究表明，生物炭与耐盐作物协同作用可显著改善土壤理化性质、激活微生物功能并提高磷素有效性。 |
| 英文摘要: |
| The purpose of this study was to explore the synergistic regulation of biochar and salt tolerant crops on the available phosphorus content, soil physical and chemical properties, and microbial community in coastal mudflat saline soil, and to clarify the key mechanism of phosphorus activation in saline soil, so as to improve the utilization efficiency of mudflat resources. Six treatment groups were set up in the coastal mudflat area of Yancheng, Jiangsu Province, including CK without biochar and milk salt crops, BC with biochar, salt tolerant crops （oats ZW1 and sorghum ZW2）, and the combined treatment of biochar and salt tolerant crops（oats V1 and sorghum V2）. Through field experiments, the physical and chemical properties, microbial diversity, alkaline phosphatase（ALP）activity, and available phosphorus content of the soil were determined. Redundancy analysis and partial least squares structural equation modeling（PLS-SEM）were used to analyze the interactions between various factors. The results showed that the combined treatment of biochar and salt tolerant crops（V1 and V2）significantly reduced soil pH and EC, increased water content, porosity, and cation exchange capacity, and increased soil organic matter, total phosphorus, and available phosphorus content by 603.5%, 447.5%, and 491.0%, respectively. In the microbial community, the abundance of Proteobacteria significantly increased, which was positively correlated with alkaline phosphatase activity（increased by 184%） and was a key microbial group promoting phosphorus activation. The PLS-SEM model indicates that soil physicochemical properties jointly regulate the available phosphorus content through direct pathways（path coefficient 0.693 1）and indirect pathways （microbial community 0.867 7 and alkaline phosphatase activity 0.082 9）. The synergistic effect of biochar and salt tolerant plants can significantly improve the physical and chemical properties of soil, activate microbial functions and improve phosphorus availability, providing scientific basis and technical. |
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