Potential microorganisms and biomass increase in emerald grass (Zoysia japonica Steud.)
DOI:
https://doi.org/10.6008/CBPC2179-6858.2020.001.0028Keywords:
Rhizobacteria, Inoculation method, SustainabilityAbstract
The emerging demand for decreasing dependence on mineral fertilizers and the need for the development of sustainable agriculture points to the use of microorganisms as a viable alternative to the producer. The aim was to select potential growth promoters and method of inoculation of emerald grass plants comparing them with mineral fertilization. Nine microorganisms were tested in a completely randomized experimental design. In the first assay arranged in an 8x2 factorial arrangement (control / uninoculated, inoculated with Pseudomonas fluorescens (BRM32111), inoculated with Burkholderia pyrrocinia (BRM32113), inoculated with Pseudoruegeria sabulilitoris strain GJMS-35 (R-92), inoculated with Bacillus thuringiensis YBT- 1518 (R-61), inoculated with Bacillus thuringiensis YBT-1518 (R-58), inoculated with a mix composed of BRM32111 + BRM32113 and inoculated with a Trichoderma asperellum mix (UFRA-T.06, UFRA-T.09, UFRA- T.12, and UFRA-T.52) in two application methods, watering and soaking), with four replications, totaling 64 experimental units. The second trial tested the performance of the best method and best microorganism in response to the application of mineral fertilization in a completely randomized design, in a 4x2 factorial scheme (limestone (without NPK), limestone + NPK (urea, triple superphosphate and potassium chloride). ), NPnK (urea, Araxa phosphate and potassium chloride) and substrate (soil without NPK / liming), with and without inoculation) with five replications. Irrigation application method, independent of the isolate, provided 65% increase in total dry matter, while by immersion the increase was 35% in relation to the control. Higher increases were achieved by BRM32113, with gains of 156% and 92% in root dry matter and plant height, respectively, compared to control. There were also increases in green soil cover and leaf nutrient content, favored by bacterial inoculation.
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