Effects of irrigation and fertilization on soil microorganisms

Abstract

The purpose of this study is to determine the influence of nitrogen fertilization and irrigation on the total count of aerobic mesophilic microorganisms, moulds and yeasts in the soil. The experiment was conducted in three variants and samples were taken as follows: from irrigated and fertilized furrow; from irrigated non-fertilized furrow and from furrow without irrigation and fertilization. For determination of total number of mesophilic aerobic microorganisms, moulds and yeasts the samples were diluted and cultivated on medium sheets coated with culture medium according to the requirements of the microorganisms. Data analysis shows that fertilization has the strongest multiplication effect on the number of aerobic mesophilic microorganisms in soil (their 6 6 number increases from 10.522 x 10 to 12.8 x 10 cfu/g), whereas the irrigation does not have any statistically significant impact. The multiplication of moulds 5 and yeasts in this trial is stimulated mainly by the increased humidity. When irrigation is applied the number of moulds and yeasts increases from 1.158 x 10 to 5 1.407 x 10 cfu/g, while fertilization does not affect their quantity in a statistically significant way.

Responses of soil bacteria and fungi after 36 years fertilizer, straw cover and irrigation management practices in northwest China

“…In addition, irrigation can improve the soil moisture conditions and meet the demands for crop growth, which is general use is in the arid and semi-arid region of China. However, few studies have investigated the effects on the microbial community dynamics of land management based on irrigation and nitrogen and phosphorus chemical fertilizer incorporate (Dinev et al, 2016).…”

Impact of Drip Irrigation and Nitrogen Fertilization on Soil Microbial Diversity of Spring Maize

“…In the study by Yan et al [ 38 ], ammonification bacteria significantly increased, and N-fixing bacteria significantly decreased with precipitation reduction. Dinev et al [ 39 ] showed that fertilization has the strongest multiplication effect on the number of aerobic mesophilic microorganisms in the soil, whereas irrigation has no statistically significant impact. In the study by Jiao et al [ 40 ], with the increase in soil moisture, the dominant bacterial species shifted from Actinobacteria to Alphaproteobacteria and Acidobacteria.…”