文献类型： 外文期刊

作者： Huang, Yuanhang ¹ ; Li, Liangwu ¹ ; Li, Guilong ¹ ; Peng, Xiaohui ¹ ; Ou, Guining ¹ ; Zhou, Jia ³ ; Qin, Fengyan ¹ ; Yang, Weixian ¹ ; Wei, Maogui ¹ ; Shen, Zhangyou ³ ;

作者机构： 1.Guangxi Univ, Coll Agron, Nanning 530004, Peoples R China

2.Guangxi Acad Agr Sci, Guangxi Subtrop Crops Res Inst, Nanning, Peoples R China

3.Guangxi Acad Agr Sci, Cash Crops Res Inst, Nanning 530007, Peoples R China

4.Guangxi Univ, Guangxi Key Lab Agroenvironm & Agroprod Safety, Nanning, Guangxi, Peoples R China

关键词： bacterial richness; cassava; deep vertical rotary tillage; Fenlong tillage; nitrogen

期刊名称：SOIL USE AND MANAGEMENT （ 影响因子：3.7； 五年影响因子：4.0 ）

ISSN： 0266-0032

年卷期： 2025 年 41 卷 1 期

页码：

收录情况： SCI

摘要： As a starch and biofuel feedstock in China, cassava (Manihot esculenta Crantz) is continuously cultivated on marginal land in the south, predominantly in red and yellow soil types. With the prolonged application of conventional tillage (CT) method (mouldboard ploughing once at a depth of 30-35 cm and then raked twice at a depth of 18 cm), the soil became increasingly compact, while the cassava yield decreased year after year. The previous study reported that the cassava yield was significantly increased by Fenlong (FL) tillage, which implements the use of spiral drill bits to replace traditional ploughshares. Thus, the current study aimed to reveal how FL combined with N application affects the bacterial community diversity of cassava rhizosphere soil. The results indicated that Actinobacteria, Proteobacteria, Chloroflexi, Acidobacteria, and Firmicutes were the most abundant phyla in cassava rhizosphere soil. The relative abundances of Actinobacteria, Firmicutes, and Gemmatimonadetes of the CT group were generally higher than the FL group in 2019, while the relative abundances of Actinobacteria, Chloroflexi, and Planctomycetota in the FL treatments were higher than those in the CT treatments in 2020. In addition, the abundance of the phylum Acidobacteria decreased with the N application rate, and its abundance was generally higher in the FL group than in the CT group in 2019. Genera norank_o__Gaiellales, Bryobacter, Pseudolabrys, Acidothermus, Rhodoplanes, Conexibacter, and Paenibacillus were also found higher enriched in the FL treatment than in the CT treatment. These results indicate that FL tillage exhibited stronger abilities than CT for recruiting host-specific bacteria of cassava by creating better conditions for roots and thus boosting more exudates based on the developed root system.