Effects of different preceding crops on soil properties and rhizosphere microbial community of sugar beet

作者：Yinghao Li, Chunliu Yuan, Chunyan Huang, Zhi Li, Huimin Ren, Peng Zhang, Caiyuan Jian, Kang Han, Dejuan Kong, Zhenzhen Wang, Xiaoxia Guo, Lü Tian · 发表于：Frontiers in Plant Science · 年份：2025 · DOI：10.3389/fpls.2025.1626870 · 被引用次数：2 · 研究领域：Agricultural Science and Fertilization、Rice Cultivation and Yield Improvement、Agronomic Practices and Intercropping Systems

A significant challenge in sugar beet cultivation is the issue of continuous cropping cycles. The implementation of preceding crop cultivation has emerged as an effective strategy to mitigate the problems associated with continuous cropping systems. This study investigates how different preceding crops influence soil properties, microbial diversity, and community structure in the sugar beet rhizosphere, thereby establishing a theoretical foundation for addressing continuous cropping obstacles in sugar beet production. This study utilized a field experiment with four distinct preceding crop treatments-potato, oat, corn, and sunflower-prior to sugar beet cultivation. Subsequent analyses focused on sugar beet growth performance, soil chemical properties, and shifts in microbial community structure. The findings demonstrate that preceding crops significantly alter nutrient availability in sugar beet rhizosphere soil, microbial diversity, and overall crop productivity. Specifically, oat and potato stubbles substantially enhanced soil organic matter content, available nitrogen, phosphorus, and potassium levels, along with increased activities of alkaline phosphatase, urease, and sucrase, ultimately promoting sugar beet growth. Sunflower stubble exhibited distinct effects, notably increasing bacterial diversity while reducing fungal diversity. Across all treatments, the dominant bacterial phyla in the sugar beet rhizosphere were Firmicutes and Acidobacteria, whereas Ascomycota and M...