ECOLOGICAL EFFECT OF INTENSIVE REARING OF NON-PERENNIAL ONION ON SOIL MICROFLORA
Abstract
Abstract. The paper investigates long-term influence of intensive rearing of non-perennial onion on microflora and phytotoxicity of leached chernozem in a year after harvesting. Early season and middle season hybrids were experimentally cultivated in 2010–2011 supported by drop irrigation, fertigation and plant protection agents. The researchers arranged two control grounds where zero tillage was restricted; they selected soil samples from the control sample plots and other land in the end of vegetation and incubate them during a year in growth chamber by means of modelling seasons. After a year, the researchers analyzed the number of bacterium consuming organic and mineral nitrogen, oligonitrophils, actonomyces and fungi and phytoxicity of tested radish. The revealed lack of long-term phytotoxic effects of intensive technology on soil microflora, which destructs easily decomposed organic remnants and further nitrogen immobilization. Negative effects were observed under early season onion hybrids after 17–20 % suppressing actonomyces and fungi and longterm soil oligotrophic ability; middle season hybrids are characterized by long-term oligotrophic ability and suppressing actonomyces in 1.6 times. This technology affects the environment as a breach in microbial community revealed in changing number of hydrolitics, copyotrophs and oligotrophs. It certifies about longer than 12 months period of soil microflora remediation after pesticide stress in the Ob area.
About the Authors
S. A. Ferapontova
ЗАО «Агродоктор»
Russian Federation
Russian Federation
L. N. Korobova
Новосибирский государственный аграрный университет
Russian Federation
Russian Federation
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Review
For citations:
Ferapontova S.A., Korobova L.N. ECOLOGICAL EFFECT OF INTENSIVE REARING OF NON-PERENNIAL ONION ON SOIL MICROFLORA. Bulletin of NSAU (Novosibirsk State Agrarian University). 2015;(2):70-76. (In Russ.)
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