Crescimento e produção de couve-folha em função da incorporação de esterco bovino e biofertilizante ao solo.

Abstract

The use of biofertilizers and organic fertilizers such as cattle manure in agriculture is essential to promote the sustainability of production systems, reducing dependence on chemical inputs and improving soil fertility. These products, derived from organic matter, provide essential nutrients in a gradual release, stimulate microbial activity and increase the water-holding capacity of the soil. However, for its potential to be maximized, it is crucial to consider the time for incorporation of cattle manure before application as a biofertilizer. Therefore, the objective of this work was to evaluate the effects of the time of incorporation of cattle manure and application of biofertilizer on the morphology and production of kale cv. butter cabbage cultivated in the semiarid region of Paraíba. The research was conducted under field conditions in São Domingos, PB, using a randomized block experimental design, with four replications in split plots. Biofertilizer concentrations (25 and 50%) were evaluated in the plots and five times of manure incorporation were evaluated in the subplots (0, 15, 30, 45 and 60 days before planting - DAP). The plot consisted of 624 plants and the subplot of 90 plants. The increase in concentrations of 25 to 50% of biofertilizers, associated with the incorporation of cattle manure for up to 60 days, reduces the growth in stem diameter and the accumulation of fresh biomass of leaves and stems of kale plants cv. kale-manteiga. The biofertilizer concentration of 25%, associated with the incorporation of cattle manure in the range of 31 to 39 days, favors a greater accumulation of dry phytomass of leaves and stems of kale plants cv. kale-manteiga. The biofertilizer concentration of 50%, associated with the incorporation of cattle manure in the strip at 33 days, favors a greater accumulation of total dry matter of kale plants cv. kalemanteiga.