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

Rilbson Henrique Silva dos Santos, Mirandy dos Santos Dias, Francisco de Assis da Silva, João Paulo de Oliveira Santos, Saniel Carlos dos Santos, Lígia Sampaio Reis, Clécio Lima Tavares
2020 Colloquium Agrariae  
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
more » ... 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.
doi:10.5747/10.5747/ca.2020.v16.n2.a374 fatcat:lz4c5jja65gqxmon7pjmuqop3q