Efeito de fontes de adubação sobre as características produtivas da palma forrageira.

Abstract

The objective of this study was to evaluate the productive and water characteristics of forage palm fertilized with cattle manure and ash under different rainfed doses in the semi-arid region of Paraíba. The experiment was carried out in Alagoinha-PB, Brazil, at 480 days after planting the evaluations started. The design was in randomized blocks, with three replications, composed of two sources of organic fertilization of foundation: bovine manure and ash with the respective doses of 10, 20 and 30 t ha-¹ and 4, 8 and 16 t ha-¹ + the control treatment without fertilization. For all production and water variables, both sources showed linear growth with the addition of doses. For PMV and PMS, the maximum manure dose showed an increase of 74.05% and 71.96% and ash of 52.68% and 61.2 respectively in relation to the control treatment. For EUC, the maximum doses of manure and ash (30 and 16 t ha-¹ respectively) increased by 71 and 38.78% with less water use per unit of biomass produced of 102.6 and 223.9 m³ of water t MS-¹ in a 480-day cycle. The use of the two sources of fertilization contributed to the productive yield and water efficiency, optimizing the production of forage palm in the rainfed production system.