Matéria orgânica como atenuante da salinidade da água de irrigação na cultura do milho

Abstract

The objective of this study was to evaluate the development of corn crop at different levels of irrigation water salinity in two concentrations of soil organic matter. The experiment was conducted at the Center for Agrarian Sciences of the Federal University of Alagoas. The experimental design adopted was the entirely randomized in factorial scheme 5 x 2, with four replications. The treatments consisted of different levels of electrical conductivity of CEa water (0,5; 1,5; 3,0; 4,5 and 6,0 dS m-¹) associated with the presence and absence of organic matter in the soil. The saline solutions were prepared with NaCl and distilled water, using the formula: TSD (g L-1) = 0.64 x CEa. At 40 days after emergence, the plants were collected and analyzed for the number of leaves, plant height, leaf area, shoot dry mass and dry mass of the root system and the relative chlorophyll index of the leaves. It was found that all the variables studied were affected by the increase in salinity levels of irrigation water and that the addition of organic matter in the soil in isolation provided a better development of maize plants.

Organic fertilization and salt stress on the agronomic performance of maize crop

“…Some studies have shown the positive effect of the use of organic sources in saline environments. Santos et al (2020) investigated the effect of the use of organic matter on maize crop growth under salinity and showed positive effects, including mitigation of saline stress. Similarly, Nascimento et al (2017) and Sousa et al (2017) demonstrated the benefit of the use of organic inputs in mitigating salt stress in sesame and yellow passion fruit crops irrigated with saline water and Santos et al (2019) demonstrated the same for bell pepper crops irrigated with saline water.…”