Crescimento e potencial osmótico foliar do milho cultivado em solo salino submetido a diferentes doses de esterco bovino.

Abstract

Organic fertilization with caule manure is a technique widely used in our region due to its availability and mainly to mitigate the e#ects caused by saline soil during the implementation of the com crop. To have a good productivity is required nutrient support on the ground to ensure the plants the help of your needs. The addition of organic compounds to the soil provides improvement in their physical, chemical and biological structures. Thus, the objective of this study was to evaluate the growth and leaf osmotic potential of maize grown in saline soil under different doses of caule manure applied superficially and incorporated unto the soil. The experiment was conducted at the Federal University of Campina Grande (UFCG) Pombal, PB, in the Center of Science and Technology Agrifood (CCTA) in the period from April 7 to May 7, 2015, using the hybrid maize variety "AG 1051 ." The experimental design was completely randomized (DIC) in a factorial scheme (2 x 5) with 4 replications, consisting of two forms of manure application (incorporated into the soil and surface) and ave doses of caule manure (0, 100, 300, 500, and 700 ml of manure per pot). The variables studied were: plant (AP) height, stem diameter (DC), number of leaves per plant (NF), dry weight of leaf (MSF), dry mass of the stem (MSC), total dry matter (MST) and osmotic potential (POSM). For the variables of growth in planta, the highest average observed occurred when the concentration of 700 ml was used. When the manure is incorporated unto the soir provided better averages in the dry mass of planas.