热带作物学报2024，Vol.45Issue(6)：1194-1204,11.DOI:10.3969/j.issn.1000-2561.2024.06.011
荔枝园间作柱花草对土壤理化性质和土壤细菌群落结构的影响
Effects of Intercropping Stylosanthes guianensis on Soil Physico-chemical Properties and Bacterial Community Structure in a Litchi Orchard
摘要
Abstract
The study was aimed to investigate the effects of litchi orchard intercropping Stylosanthes guianensis on soil physicochemical properties and soil bacterial community structure,and to provide theoretical basis for litchi orchard intercropping S.guianensis.Soil samples from litchi orchard intercropped with S.guianensis and litchi monocropping modes were used to determine soil physicochemical properties and analyzed by bacterial amplicon sequencing.After intercropping S.guianensis in litchi orchard,in the soil layer depth of 0-20 cm,nitrate nitrogen content significantly increased by 47.52％,available phosphorus content highly significantly increased by 141.53％and available potassium content highly significantly reduced by 125.59％;in the soil layer depth of 20-40 cm,nitrate nitrogen content highly significantly increased by 76.02％,available phosphorus content highly significantly increased by 48.52％,and available potassium content highly significantly reduced by 188.57％.In terms of alpha bacterial diversity,there were no signifi-cant changes in Chao1 index,AEC index,Simpson index and Shannon index in 0-20 cm soil layer and 20-40 cm soil layer after intercropping S.guianensis in litchi orchard.In terms of soil bacterial community structure,the main domi-nant phyla in the soil samples were all Acidobacteriota,Proteobacteria,Firmicutes,Chloroflexi,Bacteroidota,Verru-comicrobiota,Actinobacteriota,Gemmatimonadota,Myxococcota,Crenarchaeota,and Crenarchaeota were soil-specific relative abundances greater than 1％of the phyla after intercropping S.guianensis at 0-20 cm soil depth;at the genus level,in the 0-20 cm soil layer,Candidatus_Nitrosotalea was the genus with soil-specific relative abundance greater than 1％after intercropping S.guianensis,and at the 0-40 cm soil level,Nitrospira was the genus with soil-specific relative abundance greater than 1％after intercropping S.guianensis,Proteobacteria,Verrucomicrobiota,and Gem-matimonadota increased at all soil depths after intercropping S.guianensis;the results of the redundancy analysis showed that the soil bacterial community was mainly affected by effective phosphorus,nitrate nitrogen,and organic matter.In summary,intercropping litchi orchard with S.guianensis would improve the physicochemical properties and change the structure of soil bacterial community in litchi orchard soil,and play a certain role in optimizing the envi-ronmental conditions of litchi orchard soil.关键词
荔枝/间作/柱花草/土壤养分/土壤细菌群落结构Key words
litchi/intercropping/Stylosanthes guianensis/soil nutrients/soil bacterial community structure分类
农业科技引用本文复制引用
李承臻,袁秉琛,王燕茹,蓝俊,罗丽娟,虞道耿..荔枝园间作柱花草对土壤理化性质和土壤细菌群落结构的影响[J].热带作物学报,2024,45(6):1194-1204,11.基金项目
国家荔枝龙眼产业技术体系项目(No.CARS-32-20) （No.CARS-32-20）
中国热带农业科学院热带作物品种资源研究所成果转移转化项目"果园间作牧草技术模式研究与示范"(No.PZS2022001). （No.PZS2022001）
