Phosphate and micronutrient sources are relevant in corn crop

Abstract

The efficient use of phosphate fertilizers promotes good manners of soil management, whom those affect directly the disponibility of phosphate (P) and this use of the cultures. As the degree of importance of this nutrient, the exertion of the micronutrients purposes benefits for the plants, few noted and in a productivity increase, therefore, in the force, on the tolerance of diseases and plagues and in the quality of the production when reap. On this form, the work has the objective to evaluate the behavior the initial bearing of corn, submitted at phosphor hard applies and micronutrients in a Yellow Latossolus, on the city of Belém/PA. The experiment in a vegetation's house in Instituto de Ciências Agrárias of Universidade Federal Rural da Amazônia (UFRA). The experiment was conducted of five steps: Control Treatment (just soil); application of simple superphosphate + micronutrients; natural phosphate' application reactive of Arad + micronutrients; application of simply superphosphate (single) and natural phosphate reactivated of Arad (single). The treatment was distributed in an experimental delimitation entirely randomized with six repetitions. Was measured the height of the plant, culm diameter, mulch numbers, fresh mass of air part, fresh mass of the root, total fresh mass and the relationship with the area of the root. The height of the corn was higher for the treatments with the use of the Simple Superphosphates, allied or not with the micronutrients. So as the plant height, the diameter of the colm, mulch, numbers, fresh mas of air part, fresh mass of the root, total fresh mass and the relation with the part of the root and fresh mass, the best results was the treatment with the application of the Simple Superphosphate (single). For the fresh mass of air part and the area/root of the fresh mass, the use of the Simple Superphosphate + micronutrients shows the best result. The treatment containing just the Natural Phosphate reactivated of Arad (single), provide the best influence of MSR. On the variable total fresh mass, the use of the Simple Superphosphate without the use of the micronutrients reached the best average. The Phosphate sources, Simple Superphosphate, and Natural Phosphate reactivated of Arad, with the addition of the micronutrients, it benefits highly the development of the culture of the corn. The Simple Superphosphate, with or without the use of the micronutrients, presents the better efficiency of most of the filometrical parameters with corn plants, with the exception of the fresh mass of the root.