<![CDATA[AbstractThis research was conducted from October to November 2019 at the peatland of Kualu Nenas Village, Tambang, Kampar District, Riau Province. The purpose of this research is to get ‘ The effect of applying mixed biofertilizer on changes in chlorophyll-a concentration in media that were given peat soils’ The method used in this study was the experimental method of using the Complete Random Design (CRD), 1 factor with 6 treatment levels and 3 replications. The treatment used is P0 (without biological fertilizers), P1 (provision of biological fertilizer 100%), P2 (provision of biofertilizer mixture 25% human waste : 75% cow manure biofertilizer), P3 (provision of biofertilizer mixture 50% human waste : 50% cow manure biofertilizer), P4 (provision of biofertilizer mixture 75% human waste : 25% cow manure biofertilizer), P5 (the provision of biofertilizer 100% human waste). The study was conducted for 30days. The results of this research showed a mixture of biofertilizer 75% human waste : 25% cow manure biofertilizer provides the best solution on chlorophyll concentration, which is 0,037mg/L and highest concentration occurred on day 20. The water quality parameters analyzed during the research were optimal for changed in chlorophyll concentration with a water temperature of 27-29 oC, pH 5-7, DO 3,8-6,7 ppm, Nitrate 4,75 mg/L and Orthoposfat 3,50 mg/L. Keywords: Peat Soil, Formulation Biofertilizer,Chlorophyll.]]>
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