Componentes da produtividade de grãos de milho (Zea mays L.), visando obter parâmetros para a agricultura de precisão

Abstract

In the traditional agriculture, cultures and soils parameters are variable in space and time, also in the same field crops. Generally, yield and yield components are obtained without to keep in main the space variability of field data. The present work was carried out in a commercial farm of 110 hectares, localized in Palmeira das Missões, to evaluate space and temporarily yield production and the behavior of the morphologic characteristics of two maize hybrids: 32R21from Pionner and AG9020 from Agroceres, during 2003/2004 growing season under irrigation. Plant samples were collected once a month during five months to evaluate plant height, leaf area index (LAI), kernel weight, stem mass and leaf mass. At harvest were evaluated ear mass, grain number and weight of 1000 grain. Also was obtained harvest index for both hybrids corn. Yield production was calculated from field data collected manually and compared with data collected from the harvest machine and calculated from CR CAMPEIRO 5 software. The results showed space variability for most of yield components studied. There no significant differences in variability data. Corn hybrid AG9020 produced more than hybrid P32R21 with compare harvest machine data. The importance to know yield and yield components data variation, can result to know in other indicator of variability like soil variability or other parameters.