土壤学报2024，Vol.61Issue(2)：573-582,10.DOI:10.11766/trxb202209070494
多样化培肥模式调控丛枝菌根真菌促进玉米磷素吸收
Multiple Fertilization Model Controls Arbuscular Mycorrhizal Fungi to Promote Maize Phosphorus Absorption
摘要
Abstract
[Objective]The use of arbuscular mycorrhizal fungi(AMF)to obtain nutrients from agricultural ecosystems is an effective way for red soil crops to acquire soil phosphorus(P).Given the problems of biological function degradation,low phosphorus bioavailability,and low crop yield in red soil in southern Southern China,how to regulate the AMF community in the rhizosphere of crops and optimize the mutualistic symbiotic relationship with the host is the key to breaking the bottleneck of crop phosphorus uptake in the red soil regions.[Method]In this study,four diversified fertilization measures were combined with ecological intercropping in red soil dryland with organic(straw,pig manure,bio-fertilizer)and inorganic fertilizers,and the optimal fertilization mode was screened based on crop yield and phosphorus activation level in red soil.Further,we used amplicon high-throughput sequencing and microscopic observation techniques to analyze the effect of optimal fertilization measures in red soil dryland on the composition of the AMF community.Also,a deduction of the mechanism through which the optimized AMF community stimulates the host maize phosphorus uptake was performed.[Result]The results showed that the organic-inorganic application of peanut/maize intercropping combined with straw/biofertilizer(In+NPKSB)increased total phosphorus(TP)and available phosphorus(AP)by 29.07％and 1.35 times in red soil dryland compared with maize monocropping combined with conventional fertilizers(Mo+NPK).Moreover,the relationship between AMF family levels in maize roots was enhanced.The AMF colonization rate of this measure was 2.24 times higher than that of the traditional fertilization measures,the activities of acid/alkaline phosphatase(ACP/ALP)in the maize rhizosphere were increased by 32.18％and 41.66％,and maize biomass and yield was increased by 34.98％and 67.27％,respectively.[Conclusion]The study confirmed that the fertilization measures of peanut/maize ecological intercropping in red soil dryland combined with the organic and inorganic application of straw/bio-fertilizer can optimize the AMF community composition in maize roots,activate soil phosphorus availability,and improve the phosphorus transport efficiency of host roots.This study,therefore,provides a theoretical basis for promoting the integrated application of sustainable agricultural development in red soil dryland according to local conditions.关键词
网络构建/磷素有效性/多样化培肥/丛枝菌根真菌/有机无机肥料Key words
Network construction/Phosphorus availability/Diversified fertilization/Arbuscular mycorrhizal fungi/Organic and inorganic fertilizers分类
农业科技引用本文复制引用
何港辉,沈一,王梓轩,卢居勐,孙波,陈晏..多样化培肥模式调控丛枝菌根真菌促进玉米磷素吸收[J].土壤学报,2024,61(2):573-582,10.基金项目
国家自然科学基金项目(41977098)、江苏省自然科学基金项目(BK20191510)和国家重点研发计划项目(2022YFD1900600)资助 Supported by the National Natural Science Foundation of China(No.41977098),the Natural Science Foundation of Jiangsu Province(No.BK20191510),and the National Key R&D Program of China(No.2022YFD1900600) （41977098）
