Semeadura do milho: variabilidade espacial

Abstract

The state of Mato Grosso do Sul is one of the highlights in the production of second crop corn, the crop meets both the livestock demand and the agricultural and livestock industries, being fundamental a good productivity, for that all the care is of great importance in the handling, used spacing, population, variety used, depth of planting, and arrangement of plants. The objective of this work was to evaluate the spatial variability in maize sowing with the use of precision agriculture, evaluating the spacing, stand and population. The study was conducted in an area of 16 ha divided in 35 points of 0.46 ha each. In relation to the plant stand the average was 4.305 plants per meter, a satisfactory result. For the normal spacing reached 76.26% below the 90% target. For a seed drill, on the other hand double spacing was below with 9.81% below 10%, a positive result. Failure spacing with an average of 13.96% exceeded 10%, which resulted in a smaller booth and less efficiency in the use of the area. Regarding the stand map, 38.24% of the area had a stand above eight plants per meter and 30.39% below 3.5 plants per meter, only 6.86% reached an ideal stand between 4.5 and 5 plants per meter. As for the normal distribution, 14.71% of the area is within the acceptable range 80 to 90% of normality, however, most of the area 77.45% was between 70 to 80% of normality below the expected 90%. For the faulty spacing 43.14% was below 10%, even if small regions (5.86%) were found to have reached 75% of failure. Double spacing 40.20% of the area was between 10-20% above the acceptable 10%.