Resumen

RAMIREZ, Henrry Quiñones; CADILLO, Wilder Trejo  y  MORALES, Juan Juscamaita. Quality assesment of a liquid fertilizer produced through homolactate fermentation from alpaca faeces. Ecol. apl. [online]. 2016, vol.15, n.2, pp.133-142. ISSN 1726-2216.  http://dx.doi.org/10.21704/rea.v15i2.753.

The high economic and environmental cost of the use of synthetic fertilizers leads to the search of more viable and sustainable alternatives (Pindi, 2012). This study was aimed at assessing the nutritional quality, enteropathogenic bacterial load and the phytotoxicity of a liquid fertilizer produced from alpaca faeces through the biotechnological process of homolactate fermentation. Twenty-five treatments in triplicate were prepared with alpaca faeces, lactoserum, molasses and a lactic acid microbial consortium (B-Lac) in different ratios. The most acid treatment was determined on the fifth day of fermentation using a completely randomized design with a 5 x 5 factorial arrangement (B-Lac and molasses: 0%, 5%, 10%, 15% and 20% of each factor), by carrying out an analysis of variance and Tukey's test (p<0.05) through the application of the SAS^® software version 8.0. The chosen treatment contains alpaca faeces, lactoserum, molasses and B-Lac in ratios of 40: 40: 15: 5, respectively; with an interaction effect between both factors (p= 0.0025). The liquid effluent was named Alpa-biol (pH= 3.83; C.E.= 23.4 dS·m^-1), whose dilution at 0.1% is optimum for field use. Laboratory analysis point out a high nutritional content in its pure form, low levels of cadmium, lead and chromium; and the absence of total coliforms, fecal coliforms and E. coli. Alpa- biol is a fertilizer of high nutritional and microbiological quality, and its use is recommended in high-Andean agro-ecosystems.

Palabras clave : Quality; liquid fertilizer; homolactate fermentation; alpaca faeces.

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