Abstract
The aim of this research was to determine the effect of three organic manures (vermicompost, simple compost, compost with gypsum) with four different levels, as sources of fertilization, and mixed with river sand, this was used as an inert material, on the phenolic content, antioxidant capacity and total soluble solids of bell peppers (Capsicum annuum L.). The 12 mixtures formulated, with eight replications, were distributed in a completely randomized design. Data were statistically analyzed by analysis of variance and means were compared by test Tukey5%. All variables were significantly affected (p ≤ 0.001). Fruits with highest phenolic content were developed in the mixtures M2, M5 and M6 with 538.76, 541.54 and 565.04 mg GAE·100 kg-1 DW, respectively. Antioxidant capacity of fruits was increased with mixtures M2, M5, M6 and M7 with values of 934.48, 942.04, 921.69 and 924.17 μM TEAC·g-1 DW, respectively. The soluble solids content was higher in mixtures M1 and M2 with values of 4.93 and 4.97 °Brix, respectively. It was concluded that the variables studied were favored when applying, as sources of fertilization, mixtures of these organic manures with river sand, which could represent a suitable alternative for food production with quality nutraceutical.
Highlights
Industrial agriculture depends on expensive inputs from off the farm, many of which generate wastes that harm the environment; it uses large quantities of nonrenewable fossil fuels; and it tends toward concentration of production, driving out small producers and undermining rural communities [1]
The aim of this research was to determine the effect of three organic manures with four different levels, as sources of fertilization, and mixed with river sand, this was used as an inert material, on the phenolic content, antioxidant capacity and total soluble solids of bell peppers (Capsicum annuum L.)
The results of this study showed highly signifcant differences (P ≤ 0.001) for content of total phenolic compounds (CTPC) due to effect of mixtures of different organic manures with river sand (RS) (Figure 1)
Summary
Industrial agriculture depends on expensive inputs from off the farm (e.g., pesticides and fertilizer), many of which generate wastes that harm the environment; it uses large quantities of nonrenewable fossil fuels; and it tends toward concentration of production, driving out small producers and undermining rural communities [1]. It is widely acknowledged that, food production and their consumption have implications on human health and have a great impact on environment [4]. In this sense, during the last decades, consumers and researchers have become increasingly interested in a healthier diet, by increasing the intake of fruit and vegetables, mainly because these foods are an important source of bioactive compounds [5] and their intake can be important to prevent degenerative diseases [6]. It is more appropriate to express the antioxidant concentrations relative to the DW, because the main factors involved often affect the DW content [10]
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