Morfologia de Porta - enxerto de cajueiro anão precoce irrigado com águas salinizadas e adubação orgânica.

Abstract

The semi-arid region of the Brazilian Northeast has scarce surface water resources that are poorly distributed in terms of space and time, and it is therefore necessary to develop technology that allows the use of water with high concentrations of salts. The objective of this study was to evaluate the effects of the use of different doses of bovine manure combined with waters of different levels of irrigation water salinity on the growth of Embrapa 51 early dwarf cashew rootstocks in an experiment at the UFCG / CCTA in the municipality of Pombal - PB under protected environment conditions. A randomized complete block design was used in a 5 x 4 factorial scheme, and the treatments were composed of five levels of electrical conductivity of the irrigation water - CEa (0.3, 1.0, 1.7, 2.4 and 3.1 dS m-1), four doses of bovine manure (2.5, 3.5, 4.5 and 5.5% on a soil volume basis) with 3 replicates and 2 plants per plot. The irrigation of water with conductivity up to 1.87 dS m-1 promotes a 10% acceptable reduction in the growth of Embrapa 51 cashew tree rootstock. The organic matter dose of 4.5% promotes the increase in the number of leaves of the Embrapa 51 cashew rootstock. There was no effect for interaction between salinity of irrigation water and organic matter doses on the variables evaluated in early dwarf cashew rootstock.