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Soil carbon pool dynamics, microbial community diversity and pineapple (Ananas comosus) productivity response to partial organic substitution strategies: A four-year study

文献类型： 外文期刊

作者： Yan, Chengming 1 ; An, Dongsheng 1 ; Ma, Haiyang 1 ; Zhao, Baoshan 1 ; Liu, Yanan 1 ; Hu, Xiaowen 1 ; Ma, Zhiling 1 ;

作者机构： 1.Chinese Acad Trop Agr Sci CATAS, South Subtrop Crops Res Inst, Key Lab Trop Fruit Biol, Minist Agr & Rural Affairs China, Zhanjiang 524013, Guangdong, Peoples R China

关键词： Pineapple; Organic substitution; Soil carbon pool; Soil quality; Organic fertilizers

期刊名称：SCIENTIA HORTICULTURAE （ 影响因子：4.2； 五年影响因子：4.6 ）

ISSN： 0304-4238

年卷期： 2025 年 343 卷

页码：

收录情况： SCI

摘要： Excessive use of chemical fertilizers has caused soil degradation and reduced pineapple yields, threatening sustainable cultivation. A potential remedy involves partially substituting chemical fertilizers with organic fertilizers. Liquid organic fertilizers are gradually replacing traditional solid organic fertilizers due to their higher efficiency and easier application. However, there is still a lack of comprehensive research on how liquid organic fertilizers improve soil conditions and enhance yield in pineapple plantations. To address this gap, a four-year field experiment (2019-2023) compared three treatments: chemical fertilizers (CK, control), partial solid organic substitution (SOF), and partial liquid organic substitution (LOF). The study evaluated soil carbon (C), nitrogen (N), and phosphorus (P) stoichiometry, C pool dynamics, microbial community structure, and biomass production across two pineapple growth cycles. Results showed that LOF significantly improved soil organic carbon (SOC), labile C, and the C pool management index (CPMI) compared to CK and SOF. Additionally, LOF enhanced the soil quality index (SQI), microbial total phospholipid fatty acids (PLFAs), Shannon diversity index, and the monounsaturated/saturated PLFAs ratio. LOF increased SOC by 5.9-15.7 %, labile C by 30.7-53.4 %, and CPMI by 46.0-73.4 %. It also enhanced SQI by 21.9-24.7 %, microbial total PLFAs by 41.0-79.1 %, and the monounsaturated/saturated PLFAs ratio by 21.4-65.4 %. Furthermore, LOF boosted biomass and yield by 41.3-43.9 % and 13.7-35.9 %, respectively, while SOF excelled in enhancing SOC sequestration within macroaggregates (>0.25 mm). Correlation analysis and structural equation modeling revealed that LOF enhances soil biological fertility by optimizing SOC quantity, quality, and the C:P stoichiometric ratio, with CPMI playing a central role in improving pineapple productivity. In conclusion, LOF has demonstrated significant potential in improving soil quality and pineapple productivity, serving as a lightweight, efficient, and sustainable alternative to chemical fertilizers. It provides a reference for optimizing fertilization strategies and promoting the sustainable development of pineapple cultivation.

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