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Application of Serratia marcescens RZ ‐21 significantly enhances peanut yield and remediates continuously cropped peanut soil
Author(s) -
Ma HaiYan,
Yang Bo,
Wang HongWei,
Yang QiYin,
Dai ChuanChao
Publication year - 2015
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.7087
Subject(s) - serratia marcescens , population , fusarium oxysporum , rhizosphere , agronomy , biology , horticulture , ralstonia solanacearum , bacteria , biochemistry , genetics , demography , gene , escherichia coli , sociology
BACKGROUND Continuous cropping practices cause a severe decline in peanut yield. The aim of this study was to investigate the remediation effect of Serratia marcescens on continuously cropped peanut soil. A pot experiment was conducted under natural conditions to determine peanut agronomic indices, soil microorganism characteristics, soil enzyme activities and antagonism ability to typical pathogens at different growth stages. Four treatments were applied to red soil as follows: an active fermentation liquor of S. marcescens ( RZ ‐21), an equivalent sterilized fermentation liquor (M), an equivalent fermentation medium (P) and distilled water ( CK ). RESULTS S. marcescens significantly inhibited the two typical plant pathogens Fusarium oxysporum A1 and Ralstonia solanacearum B1 and reduced their populations in rhizosphere soil. The RZ ‐21 treatment significantly increased peanut yield, vine dry weight, root nodules and taproot length by 62.3, 33, 72 and 61.4% respectively, followed by the M treatment. The P treatment also increased root nodules and root length slightly. RZ ‐21 also enhanced the activities of soil urease, sucrase and hydrogen peroxidase at various stages. In addition, RZ ‐21 and M treatments increased the average population of soil bacteria and decreased the average population of fungi in the three critical peanut growth stages, except for M in the case of the fungal population at flowering, thus balancing the structure of the soil microorganism community. CONCLUSION This is the first report of S. marcescens being applied to continuously cropped peanut soil. The results suggest that S. marcescens RZ ‐21 has the potential to improve the soil environment and agricultural products and thus allow the development of sustainable management practices. © 2015 Society of Chemical Industry