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  Eur.J.Hortic.Sci. 80 (3) 128-133 | DOI: 10.17660/eJHS.2015/80.3.5
ISSN 1611-4426 print and 1611-4434 online | © ISHS 2015 | European Journal of Horticultural Science | Original article

Evaluation of the soil ecological measure for overcoming replant disorder of strawberry

Z.J. You1, Y. Xing1, W. Guan2, H.P. Ma1 and Z.M. Liu1
1 Beijing Key Laboratory of New Technology for Agricultural Applications, College of Plant Science and Technology, Beijing University of Agriculture, Beijing, China
2 Fruit Office, Pinggu District, China

SUMMARY
The objective of this study was to overcome strawberry replant disorder by improving the ecological environment of the soil. Replanted strawberry soil was treated using an ecological technique (soil ecological optimisation technique, SEOT), a fermented biofertilizer which consists of cow dung, straw, antagonistic actinomycetes, and solar disinfection measure commonly used in strawberry production was used as a control. The results revealed the changes in the soil micro-ecological environment after the ecological technique treatment. The microbial population was increased to plentiful levels in the soil and the ratio of bacteria plus actinomycetes to fungal strains increased markedly. The former group became the dominant species in the soil. At the same time, soil aeration, oxygen content, porosity, water holding capacity, pH value and mineral contents were all improved compared with the control. Thus, the leaf photosynthesis and the root growth exhibited clear improvement. The growth and development of the strawberry plants proceeded normally in later periods. The ratio of high quality fruits was increased by 31.43%, while the yield increased by 40%, and the picking period was extended. These findings demonstrated that the applied ecological optimisation measure (SEOT) was effective in overcoming strawberry replant disorder, mainly due to improve the environment of rhizosphere soil, particularly increasing the soil permeability and the oxygen content.

Keywords antagonistic actinomycetes, biofertilizer, ecological optimisation technique, microbial population, soil ecological environment, solar disinfection

Significance of this study

What is already known on this subject?

  • It was previously shown that soil diseases, mineral deficiencies and microbia secreted toxic substances could cause replant disease occurrence. Methyl bromide and chloropicrin as soil disinfection to prevent strawberry replant disease is now limited in use because of their strong toxicity and harmful effects on human health and the environment.
What are the new findings?
  • The key to preventing the succession of cropping obstacles is to improve soil permeability and reduce harmful gas contents in soil. The ecological measure applied in this work can prevent the occurrence of strawberry replant disorder mainly due to improve the environment of rhizosphere soil, particularly increasing the soil permeability and the oxygen content. And it is safe to the environment and human life.
What is the expected impact on horticulture?
  • Replant disorder is a universal problem existing in horticulture. The main reasons of causing strawberry replant disease are interlinked with other horticultural crops. So the solution of solving the replant problem of strawberry will be valuable in other horticultural crops, especially for vegetables.

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E-mail: liuzhimin600@sina.com  

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Received: 14 February 2014 | Revised: 2 December 2014 | Accepted: 9 December 2014 | Published: 17 June 2015 | Available online: 17 June 2015

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