Bacterial community shift in field soil caused by annual application of liquid livestock feces
2006
Watanabe, K.(National Agricultural Research Center for Kyushu Okinawa Region, Koshi, Kumamoto (Japan)) | Koga, N. | Niimi, H.
The microorganisms concerned with a higher ratio of biological nitrogen turnover in upland field soils applied with large amounts of raw liquid livestock feces were searched for using a newly developed genetic analysis system and method. In upland field soils, the flora of proteolytic bacteria, denitrifying bacteria, and bacteria isolated on peptone-polymyxin medium changed in relation to the amount of the applied liquid feces (120t/ha/y and 600t/ha/y). The isolated proteolytic Serratia marcescens, denitrifying Salmonella/E. coli, and non-Bacillus polymyxin B-resistant bacteria were non-indigenous soil bacteria typically found in the soil applied with raw feces, and their numbers were estimated to be over 10E5 CFU/g dry soil after 2 months of the application. They were supposed to have contaminated the field soils from bacteria present in the raw feces that survived for a while in the fields.
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