Microbial Diversity Associated with Organic Fertilizer Obtained by Composting of Agricultural Waste

Abstract

A common denominator that affects the production areas is the dramatic loss of fertility and thus, the natural productive capacity of soils through a sustained process of erosion. The problem of soil loss was largely due to improper production practices, such as monoculture, chemical fertilizers, pesticides, intensive farming, genetically modified seeds, among others. Agroecological alternative allows recovery of soils, compost making, and its quality depends of largely microbial diversity associated with it. The aim of the work focused on microbial characterization of different mixtures of agricultural waste in order to determine quality parameters. Through a randomized block design, six different mixes were evaluated in the village of Fusagasugá (Colombia). The OM, OC, macro and micronutrients chemical indicators were obtained from the soil laboratory at the University of Tolima, for microbial characterization macroscopic and microscopy techniques were used in the Laboratory of Microbiology of the University of Cundinamarca. Principal Component Analysis (PCA), Canonical Correspondence Analysis (CCA) incorporating with the Partial Least Squares (PLS) was made. XLSTAT statistical package (2009.3.02) was used. The most important microorganisms were, Streptomyces, Arthrobacter, Aspergillus and Penicillium genera. Treatments that presented the best quality in relation to chemical and microbiological variables were mixtures containing double burden of animal, especially hens and pig manure.

Integrating aeration and rotation processes to accelerate composting of agricultural residues

“…Several studies have indicated that for high-quality final compost, the C/N ratio should be in the range from 12/1 to 25/1, for example [30, 31]. In compost with a high C/N ratio (> 40/1), microorganisms take considerable time to break down waste because a deficiency of N reduces composting performance [32]. However, compost with a low C/N ratio causes ammonium toxicity [33].…”

Review report on the role of bioproducts, biopreparations, biostimulants and microbial inoculants in organic production of fruit

“…Using organic fertilizers in known to be beneficial for both plants and microorganisms. The use of both organic fertilizers and biopreparations can have positive effects on the soil and the plants (Escobar and Solarte 2015), however on the basis of long term experiments the effect of organic matter addition on soil suppressiveness to Pythium ultimum was not significant (Bongiornoa et al 2019).…”

Bioconversion of Egypt's Agricultural Wastes into Biogas and Compost

“…The composting process reduces AW volume, moisture content, viable weed seeds, insect larvae (flies problems), and odor; it also reduces/eliminates pathogens due to the high process temperature (thermophilic) and it produces a humus-like compost (40-50% of the starting substrate) with fine, moderate, or coarse texture and rich in nutrients to be used as a biofertilizer [48,50], which subsequently can be used in organic agriculture to produce a top-quality food by enhancing the environment and maintaining soil fertility [51], which leads to increasing crops yield [49]. The duration of the composting process reaches 90 days, but it can also last for 75 days [52]. Moreover, it can take place within only 35 days in the case of composting AWs using microencapsulated bacteria and enzymes [53].…”