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Field evaluations of agrochemical toxicity to cyanobacteria in rice field ecosystem: a review

Authors
  • Kaushik, Manish Singh1
  • Kumar, Ajay1
  • Abraham, Gerard2
  • Dash, Nalinaxya Prasad3
  • Singh, Pawan Kumar1
  • 1 Banaras Hindu University, Department of Botany, Institute of Sciences, Varanasi, 221005, India , Varanasi (India)
  • 2 Indian Agricultural Research Institute, Center for Conservation and Utilization of Blue Green Algae, New Delhi, 110012, India , New Delhi (India)
  • 3 Shikhya Soudha Unit-V, Directorate of Vocational Education, Bhubaneshwar, India , Bhubaneshwar (India)
Type
Published Article
Journal
Journal of Applied Phycology
Publisher
Springer-Verlag
Publication Date
Jul 14, 2018
Volume
31
Issue
1
Pages
471–489
Identifiers
DOI: 10.1007/s10811-018-1559-2
Source
Springer Nature
Keywords
License
Yellow

Abstract

The adverse effects of chemical nitrogen fertilizers affecting soil fertility, water pollution and native microorganisms, particularly cyanobacteria, in wetland rice cultivation have drawn global attention towards the use of alternative sources like N2-fixing cyanobacteria as a biofertilizer for sustainable rice farming. Although chemical nitrogen fertilizers are extensively used for obtaining higher rice yield, they are likely to have a deleterious effect on the growth and N2-fixation of diazotrophs, including cyanobacteria. In addition, biocides (herbicides and insecticides) are widely being used in rice cultivation for optimizing crop yield, but these chemicals also affects non-target organisms adversely. There are several reports indicating impacts of these agrochemicals on cyanobacteria, but most such studies were carried out under laboratory conditions. This article reviews information from different field evaluations on the impact of agrochemicals on cyanobacteria along with rice crop in wetland rice field ecosystem.

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