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| DOI：10.13522/j.cnki.ggps.2025319 |
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| Magnetized water irrigation improves soil microenvironment and fruit quality of greenhouse peppers under continuous cropping |
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An Kairui, Xu Yongguang, Ma Xuesong, Hou Xiaojing, Jing Ruyan, Zhang Ying
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1. Shandong Key Laboratory of Eco-environmental Science for the Yellow River Delta, Shandong University of Aeronautics,
Binzhou 256600, China; 2. Fuping County Forestry Bureau, Shaanxi Province, Wei’nan 711700, China
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| Abstract: |
| 【Objective】Long-term continuous cropping in greenhouse vegetable production could cause soil degradation and microbial community imbalance, compromising crop fruit quality. This study investigated the effect of magnetized water irrigation on soil physicochemical properties, microbial communities, and fruit quality of greenhouse peppers under continuous cropping conditions.【Method】A greenhouse experiment was carried out using pepper as the model crop. During the experiment, we measured soil moisture, organic carbon and nutrient contents in the topsoil. High-throughput sequencing was used to analyze soil microbial communities and their functions under magnetized and conventional water irrigation.【Result】①Compared with non-magnetized water irrigation, magnetized water irrigation significantly increased soil moisture content, organic carbon, ammonium nitrogen, nitrate nitrogen, and available phosphorus by 18.45%, 15.55%, 126.53%, 19.88% and 14.27%, respectively. Magnetized water irrigation also remarkably increased the longitudinal diameter of pepper fruits and average single fruit weight by 30.48% and 43.68%, respectively. ②Soil bacterial communities were dominated by Proteobacteria, Firmicutes, and Actinobacteria at the phylum level. Magnetized water irrigation significantly increased the relative abundance of Proteobacteria, while reducing the relative abundance of Firmicutes. At the genus level, magnetized water irrigation substantially increased the abundance of Bacillus while reducing the abundance of Chryseolinea and other bacteria that adapt to dry and nutrient-poor soil environment. ③Correlation analysis showed that the variations in soil microbial diversity and community composition were significantly correlated with soil pH, soil moisture, ammonium nitrogen and nitrate nitrogen. The relative abundances of Proteobacteria, Chloroflexi and other key bacterial genera showed significant positive correlations with soil pH, organic carbon, ammonium nitrogen, nitrate nitrogen, and available phosphorus. Overall, magnetized water irrigation effectively improved soil physicochemical properties, reshaped soil bacterial community structure, and increased soil nutrient availability.【Conclusion】Magnetized water irrigation improves soil properties, alters bacterial community structure, and enhances soil nutrient availability. It further promotes pepper growth, photosynthetic capacity and nutrient absorption efficiency, and improves fruit quality. This technique provides a promising irrigation strategy for sustainable greenhouse vegetable production under continuous cropping. |
| Key words: greenhouse; soil; irrigation; bacterial community; fruit quality; high-throughput sequencing |
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