Rummenigge Macêdo Rodrigues

Crescimento inicial do tomateiro-cereja sob irrigação com águas salinas em solo com biofertilizantes bovino

An experiment was conducted, from October 2009 to February 2010, in a greenhouse of the Soil and Rural Engineering Department from CCA – UFPB, Areia – PB, to evaluate the influence of the irrigation water salinity in the initial growth of the cherry tomatoes in a non-saline soil with and without two types of bovine biofertilizer. The experimental design was completely randomized in factorial scheme 5 x 3, with six repetitions, referring to values of electrical conductivity of the irrigation water: 0.5; 1.0; 2.0; 3.0 and 4.0 dS m-1 , in the soil without biofertilizer, with ordinary biofertilizer and enriched with milk, molasses, agricultural gypsum. The biofertilizers after dilution in non-saline water (0.5 dS m-1) in the ratio of 1:1 were applied only once, two days before sowing, equivalent to 10% of the substrate volume. The biofertilizers provided higher growth of plants regarding the soil without the respective inputs, regardless of water salinity level. The addition of ordinary biofertilizer and the enriched compost raised the saline character of soil more than under saline water only, but no significant difference were observed.

REBROTA E CRESCIMENTO DO NIM APÓS O CORTE EM SOLO SALINO - SÓDICO TRATADO COM INSUMOS ORGÂNICOS

Soil salinity and sodicity are global problems since both promote the physical, chemical and biological degradation of soil, jeopardising the productive capacity of agricultural fields. Inorganic correctives or organic inputs are applied as an attempt to reduce the problem, alongside the use of salt-tolerant plants. This study aimed at evaluating the effects of organic inputs on the growth of neem (Azadirachta indica) strains in saline-sodic soil after cutting. Treatments were arranged in a randomised block design, with four replicates in a 3 × 5 factorial. Organic inputs — bovine manure, common bovine biofertilizer (equal parts of water and fresh bovine manure) and chemically enriched biofertilizer (common biofertilizer components combined with plaster, sugarcane molasses and cow’s milk) — were applied only once, after soil washing, two days prior to seeding, at the levels of 0, 3, 6, 9 and 12% of the substrate volume. Except effects on the stem diameter, the most efficient input was bovine manure, with strong effects on the height increase and biomass yield of neem plants after cutting, especially in treatments at a level greater than 6%. The organic inputs, despite increasing the soil salinity and sodicity in the interval between washing and cutting, stimulated biometric growth and biomass formation in saline-sodic soil.