中国农业科学2024，Vol.57Issue(2)：349-362,14.DOI:10.3864/j.issn.0578-1752.2024.02.010
土壤质地对菠萝蜜根际微生物碳源利用、线虫群落及果实糖分的影响
Effects of Soil Texture on Rhizosphere Microbial Carbon Source Utilization,Nematode Community and Fruit Sugar of Jackfruit
摘要
Abstract
[Objective]This study aimed to investigate the variations in soil microenvironments with different textures under identical fertilization pattern and their potential relationship with the key fruit quality(sugar content),so as to provide a theoretical foundation for regional orchard fertilization and enhancing yield and quality.[Method]Standardized jackfruit Malaysia No.1 orchards,characterized by consistent fertilization practices and soil textures including loam,sandy loam and sand,was carefully selected for this study.Rhizosphere soil and mature fruit of jackfruit were collected during the tree growing,flower and fruit stages to investigate the variation of metabolic functions of soil microbial communities,nematode community structure,soil physicochemical properties and fruit sugars and potential relationships of them.[Result]The trend of carbon source utilization of soil microorganisms in sandy loam and sandy soil followed the pattern of tree growing stage>flower stage>fruit stage.The carbon source metabolic capacity of soil microorganisms in loamy soils was ranked as fruit stage>tree growing stage>flower stage.The main types of carbon sources utilized by soil microorganisms were carbohydrates,amino acids,carboxylic acids,and polymers.The diversity index of the soil microbial community and nematode abundance in each trophic group were exhibited consistently higher values in sandy soils compared with other soil types,with particularly elevated levels observed during the tree growing and fruit stages.The ecological index of nematode,soil pH and organic matter in loamy soils were generally higher than that in the other two soil types.The glucose content in fruit showed the following order:sandy loam soil>loam soil>sandy soil.The differences in other sugar components among different soil textures were not significant.The sampling stage had a significant direct effect on the diversity of soil nematode communities,and the soil texture had a significant indirect effect and total effect on the sugar content of jackfruit.[Conclusion]The combined application of organic and inorganic fertilizers had different effects on the microecological environment of soils with different textures.The soil texture exerted a direct or indirect influence on the composition and functioning of microbial and nematode communities in rhizosphere soil of jackfruit throughout the tree growing and fruit stages,thereby ultimately impacting both the soil nutrient transformation and fruit quality.关键词
土壤质地/菠萝蜜/微生物代谢多样性/线虫群落/果实糖分Key words
soil texture/jackfruit/microbial metabolic diversity/nematode community/fruit sugar引用本文复制引用
苏兰茜,濮秋婕,白亭玉,吴月仙,吴刚,谭乐和,胡雅莉..土壤质地对菠萝蜜根际微生物碳源利用、线虫群落及果实糖分的影响[J].中国农业科学,2024,57(2):349-362,14.基金项目
海南省自然科学基金(322QN400)、国家市场监管重点实验室(热带果蔬质量与安全)基础应用研究课题(KF-2023011)、中国热带农业科学院国家热带农业科学中心科技创新团队(CATASCXTD202312)、2021 年云南省谭乐和专家工作站 （322QN400）
