Response of soil microbiota after application of organo-mineral fertilizer and irrigation with saline water
Abstract
This study aimed to evaluate short-term influence of application of organo-mineral or mineral fertilizers and using irrigation with saline water on microbial community and enzymatic activity of soil, besides monitor some of its chemicals attributes. The experiment was conducted in a protected environment, with controlled air temperature and soil moisture. It was arranged in a 4 x 2 factorial design, with four salinities of irrigation water (0.1, 1.8, 3.6, and 7.2 dS m -1) and two types of fertilizer (organo-mineral and mineral). The experimental units consisted of PVC columns filled with soil, which were incubated and destroyed for analysis 20 days after the beginning of the experiment. The soil was kept with moisture close to 90% of field capacity, by measuring the weight of the columns in a daily basis and refilling the lost moisture with saline and non-saline waters, according to the treatments.The irrigation with saline water increased electrical conductivity, exchangeable sodium content, and pH of soil, especially in the adjacencies of granules with application of the organo-mineral fertilizer in relation to mineral. Carbon of microbial community and enzymatic activity of soil were negatively impacted by salt/sodic stress. The presence of organic material in the organo-mineral fertilizer did not increase ability of soil microbiota to tolerate salinity and sodicity.
Downloads
The authors declare that the work has not been previously published, nor sent simultaneously for publication in another journal and that they agree with the submission, content and transfer of the publication rights of the article in question to the scientific journal Pesquisa Agropecuária Gaúcha - PAG. The authors assume full responsibility for the originality of the article, and may incur on them any charges arising from claims by third parties in relation to the authorship of the article. The full reproduction of the journal's articles in other free-to-use electronic media is permitted under the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International license.
