Zhang Jiangzhou, Li Baoshen, Gao Wei, Ruan Yunze, Christie Peter, Zhang Junling, Zhang Yunlong
College of Resources and Environmental Sciences/National Academy of Agriculture Green Development/Key Laboratory of Plant-Soil Interactions, Ministry of Education, China Agricultural University, Beijing, China.
Biotechnology Research Institute, Guangxi Academy of Agricultural Sciences, Nanning, China.
J Sci Food Agric. 2023 Jan 30;103(2):560-568. doi: 10.1002/jsfa.12167. Epub 2022 Aug 22.
Maintaining or improving soil chemical quality is critical for sustainable agricultural productivity and environmental safeguards. Organic fertilizer application, a common agricultural practice in banana cultivation, is often associated with greater microbial biomass and activity, which are linked to improvements in soil chemical quality. However, the effect of the duration of organic fertilizer application on soil chemical quality and whether it is microbially driven still needs to be investigated. We collected soil samples from banana plantations consistently applying organic fertilizers for 1 (Y1), 4 (Y4), 7 (Y7) and 10 (Y10) years. Soil chemical quality is expressed as total data set (TDS) and minimum data set (MDS) based on chemical indicators, and soil microorganisms are characterized by phospholipid fatty acid (PLFA).
Based on TDS and MDS, the soil chemical quality indices in Y7 and Y10 treatments were significantly higher than that in Y1 and Y4 treatments. Soil total PLFA concentrations and the proportional abundance of fungi and arbuscular mycorrhizal fungi increased with prolonged banana cultivation. Total PLFA concentrations were significantly positive correlation with the soil chemical quality index. Soil gram-positive bacteria (G+), bacteria, protozoa and ratio of G+ to gram-negative bacteria (G-) were major drivers of soil chemical quality.
The organic fertilizer application can significantly improve soil chemical quality, which is regulated by soil bacteria. Regular application of organic fertilizers is important in promoting soil quality and soil biological properties need to be incorporated into the assessment of soil health in banana plantations. © 2022 Society of Chemical Industry.
维持或改善土壤化学质量对于农业可持续生产力和环境保护至关重要。施用有机肥是香蕉种植中常见的农业实践，通常与更高的微生物生物量和活性相关，而这又与土壤化学质量的改善有关。然而，有机肥施用持续时间对土壤化学质量的影响以及这种影响是否由微生物驱动仍有待研究。我们从连续施用有机肥1年（Y1）、4年（Y4）、7年（Y7）和10年（Y10）的香蕉种植园中采集了土壤样本。土壤化学质量根据化学指标表示为总数据集（TDS）和最小数据集（MDS），土壤微生物则通过磷脂脂肪酸（PLFA）进行表征。
基于TDS和MDS，Y7和Y10处理的土壤化学质量指数显著高于Y1和Y4处理。随着香蕉种植年限的延长，土壤总PLFA浓度以及真菌和丛枝菌根真菌的比例丰度增加。总PLFA浓度与土壤化学质量指数呈显著正相关。土壤革兰氏阳性菌（G+）、细菌、原生动物以及G+与革兰氏阴性菌（G-）的比例是土壤化学质量的主要驱动因素。
施用有机肥可显著改善土壤化学质量，这一过程受土壤细菌调节。定期施用有机肥对于提高土壤质量很重要，并且土壤生物学特性需要纳入香蕉种植园土壤健康评估中。© 2022化学工业协会。
