Impact of different doses of deltamethrine on soil microbial density and crop growth
1 Science Laboratory Technology, School of Applied Sciences, Kenule Saro-Wiwa Polytechnic, Bori, Rivers State, Nigeria.
2 Department of Microbiology, Federal University of Technology, Owerri, Imo State, Nigeria.
Research Article
GSC Advanced Research and Reviews, 2021, 08(03), 036–042.
Article DOI: 10.30574/gscarr.2021.8.3.0175
Publication history:
Received on 21 July 2021; revised on 02 September 2021; accepted on 04 September 2021
Abstract:
The effects of agrochemicals pollution on soil nutrients, soil microbes as well as plants cultivated on the soil were studied. Insecticide and herbicide were used to impact on the soil samples across concentration gradients. Bean and maize seeds were planted in separate experiments to monitor the effects of the agrochemicals on the plants. The microbial diversity and the physicochemical characteristics of the soil before and after pollution were determined using standard methods. Chlorophyll contents of the leaves were also determined after planting. Results indicated that bacterial isolates such as Enterococcus sp 54(40%), Staphylococcus sp 8(13%), Bacillus sp 46(34%) and Micrococcus sp 15(11%) and fungal isolates such as Penicillium sp 41(34%), Saccharomyces sp 67(56%), Yeast sp 4(3%), Geotrichum sp 6 (5%) and Aspergillus sp 1(1.8%) were recovered from treated and untreated soil with the percentages representing after planting. From the results, the herbicide treated soils indicated that the Total Heterotrophic Bacterial Count (THBC) increased after cultivation while the Total Heterotrophic Fungal Count (THFC) decreased after cultivation. On the other hand, the insecticides treated soils recorded a general decrease in THFC and THBC after cultivation. The total nitrogen (TN) and available phosphorus (AP) had no significant differences before and after planting while the exchangeable potassium (EP) had significant increase recorded after planting. Plants generally had poor growth characteristics recorded by stem girth and length, as well as chlorophyll content.
Keywords:
Agrochemicals; Microbial density; Crop yield; Deltamethrine
Full text article in PDF:
Copyright information:
Copyright © 2021 Author(s) retain the copyright of this article. This article is published under the terms of the Creative Commons Attribution Liscense 4.0
