Disponibilidade de N, P, K em Neossolo Regolítico cultivado com batata inglesa sob manejos agroecológicos.

Abstract

The low natural fertility of the soils of the northeastern semi-arid region has caused a reduced productivity of the crops grown in the region, such as the English potato. In view of this scenario, the implementation of agroecological management systems has emerged as an alternative to favor the biocycling of nutrients and improve soil fertility. The work aimed to evaluate the availability of nutrients N, P and K in Regolitic Neossols grown with potatoes under agroecological management. Three producing municipalities were selected, Areial (07o 02 '52' 'S 35o 55' 51 '' O), Esperança (07o 01 '22' 'S 35o 51' 36 '' O) and Remígio (06o 54 '10' ' S 35o 50 '02' 'O) located in the Microregion of Agreste da Paraíba. In each municipality, five properties were chosen whose history was the cultivation of potatoes (Solanum tuberosum L.), with a different management system, namely: T1 = Bovine manure + Rock powder + Biofertilizer; T2 = Bovine manure + Biofertilizer; T3 = Cattle Dung; T4 = Goat manure; T5 = Bovine manure + Rock powder. Simple soil samples were collected at depths of 0-20 cm and 20-40 cm in each study area, in the planting lines, in transect crossing the area, from the simple samples, composite samples were formed where the 10 samples were mixed each area separately, as well as each depth, with repetitions being made in duplicate. and taken to the Soil Organic Matter Laboratory of the Department of Soil and Rural Engineering of the Center for Agricultural Sciences-CCA / UFPB. The evaluated parameters were the levels of N, P and K the goat manure promoted a greater availability of the nutrient nitrogen; the association of bovine manure and rock powder, contributed to the greater availability of phosphorus and for the potassium nutrient, the application of bovine manure associated with rock powder and biofertilizer favored the increase of the levels in the Regolitic Neossol.