Abstract
Adequate soil fertilization with organic fertilizer improves plant productivity, allowing healthy food production, besides reducing dependence on mineral fertilizers. This work aimed to evaluate the effect of swine bio-fertilizer doses on plant nutritional status and yield, nutrient extraction and export, and microbiological quality of organically cultivatedsnap-bean, MacarraoTrepador cultivar. The experiment was developed using a randomized block design with five fertilizer doses (0; 30; 60; 90 and 180 m 3 ha -1 ), and four repetitions. Each plot contained forty 1.0 m x 0.3 m spaced plants. Greater pod length (14.6 cm), larger number of pods per plant (65), and higher yield (16.5 t ha -1 ) were obtained when higher bio-fertilizer doses were applied. Fertilization with swine bio-fertilizer improved the plant’s nutritional status and increased the culture’s yield from 5.9 to 16.5 t ha -1 . Macronutrients extracted by plants in the dose that promote the highest yield (kg ha -1 ) were: 98.1 of N, 10.5 of P; 48.1 of K; 35.0 of Ca; 12.2 of Mg and 6.6 kg ha -1 of S. The fertilization with swine biofertilizer increased yield and improves the nutritional status of plants. Biofertilizer application and irrigation with low microbial load water produced microbiological quality pods according to ANVISA standards. Additional keywords: nutrient extraction; organic fertilization; Phaseolus vulgaris L.; plant nutrition.
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