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peer-reviewed research article

Soil sterilization and organic carbon, but not microbial inoculants, change microbial communities in replanted peach orchards

authors

Rebecca E. Drenovsky
Roger A. Duncan, Stanislaus County
Kate M. Scow, UC Davis

publication information

California Agriculture 59(3):176-181. DOI: 10.3733/ca.v059n03p176. July-September 2005.

abstract

Methyl bromide is highly effective in reducing soil pathogens. Although its use was to be phased out completely in the United States by Jan. 1, 2005, due to environmental concerns, a 1-year critical-use exemption will allow tree fruit growers to use the fumigant through the end of the year. To explore possible replacements for methyl bromide, we compared the effects of pre- and postplant treatments and amendments on soil microbial communities and tree vigor in a replanted peach orchard. Both soil sterilization treatments and organic carbon amendments changed the composition of microbial communities in the soil. High microbial biomass is generally considered beneficial to agricultural soils; we found that it was usually highest in soils that received the organic carbon amendment and lowest in those with soil sterilization. However, tree vigor was highest with the sterilization treatments. The effects of a microbial inoculants/organic carbon combination on microbial communities and plant vigor were no different from simply adding organic carbon.

author affiliations

R.E. Drenovsky is Postdoctoral Researcher; R.A. Duncan is Farm Advisor, UC Cooperative Extension, Stanislaus County. The authors thank Kevin Feris for manuscript review, and Kim Chuong, Levina Loveless, Anita Setty and Angela Maroney for sample preparation and analysis. A special thank you is extended to Norman Kline, grower, for participating in the trial. A grant from the California Cling Peach Board made this work possible. K.M. Scow is Professor, Department of Land, Air and Water Resources, UC Davis;

References

Alden L, Demoling F, Bååth E. Rapid method of determining factors limiting bacterial growth in soil. Appl Environ Microbiol. 2001. 67:8. DOI: 10.1128/AEM.67.4.1830-1838.2001 [CrossRef]

Bossio DA, Scow KM. Management changes in rice production alter microbial community. Cal Ag. 1997. 51(6):40.

Bossio DA, Scow KM. Impacts of carbon and flooding on soil microbial communities: Phospholipids fatty acid profiles and substrate utilization patterns. Microbiol Ecol. 1998. 35:78. DOI: 10.1007/s002489900082 [CrossRef]

Browne GT, Kluepfel DA, Connell J, et al. Biology and management of replant disorder and lethal phytophthora canker. 32nd Almond Industry Conference Proceedings 2004. pp.138-46. http://www.almond-board.com .

Calderon FJ, Jackson LE, Scow KM, Rolston DE. Short-term dynamics of nitrogen, microbial activity, and phospholipid fatty acids after tillage. Soil Sci Soc Am J. 2001. 65:26.

Duncan RA, Stapleton JJ, McKenry MV. Establishment of orchards with black polyethylene film mulching: Effect on nematode and fungal pathogens, water conservation, and tree growth. J Nematol. 1992. 24(4S):7.

Macalady JL, Fuller ME, Scow KM. Effects of metam sodium fumigation on soil microbial activity and community structure. J Environ Qual. 1998. 27:63.

Mazzola M. Elucidation of the microbial complex having a causal role in the development of apple replant disease in Washington. Phytopathol. 1998. 88:8. DOI: 10.1094/PHYTO.1998.88.9.930 [CrossRef]

Peacock AD, Mullen MD, Ringelberg DB, et al. Soil microbial community responses to dairy manure or ammonium nitrate applications. Soil Biol Biochem. 2001. 33:9. DOI: 10.1016/S0038-0717(01)00004-9 [CrossRef]

Radewald JD, McKenry MV, Roberts PA, Westerdahl BB. The importance of soil fumigation for nematode control. Cal Ag. 1987. 41(11, 12):7.

Shiomi Y, Nishiyama M, Onizuka T, Marumoto T. Comparison of bacterial community structures in the rhizoplane of tomato plants grown in soils suppressive and conducive towards bacterial wilt. Appl Environ Microbiol. 1999. 65:4001.

Steenwerth KL, Jackson LE, Calderon FJ, et al. Soil microbial community composition and land use history in cultivated and grassland ecosystems of coastal California. Soil Biol Biochem. 2002. 34:611. DOI: 10.1016/S0038-0717(02)00144-X [CrossRef]

Torsvik V, Salte K, Sorheim R, Goks?yr J. Comparison of phenotypic diversity and DNA heterogeneity in a population of soil bacteria. Appl Environ Microbiol. 1990. 56:81.

Van Elsas JD, Garbeva P, Salles J. Effects of agronomical measures on the microbial diversity of soils as related to the suppression of soil-borne plant pathogens. Biodegradation. 2002. 13:40. DOI: 10.1023/A:1016393915414 [CrossRef]

Westphal A, Browne GT, Schneider S. Evidence for biological nature of the grape replant problem in California. Plant Soil. 2002. 242:203. DOI: 10.1023/A:1016297603427 [CrossRef]

Yao H, He Z, Wilson MJ, Campbell CD. Microbial biomass and community structure in a sequence of soils with increasing fertility and changing land use. Microbiol Ecol. 2000. 40:37.