MATOCOMPETIÇÃO DE MILHETO VOLUNTÁRIO COM MILHO CONVENCIONAL E SORGO EM SEGUNDA SAFRA NO CERRADO

Abstract

Millet plants can compete for resources available with corn and sorghum, and there is no such approach in the literature. The objective of this work was to evaluate the effects of matocompetition of six maize densities on conventional maize and sorghum crops under second crop conditions in the Cerrado of Goiás state. The work was carried out in the field, in randomized blocks with 4 replications in each crop, which were cultivated in isolation, under the same conditions and in the same sowing data. Hybrids P3898 and XB6022 of corn and sorghum, respectively, were used. As the mileage rates used correspond to 0, 2, 4, 6, 8 and 10 plants m-2. Saved seeds from the hybrid ADRg 9050 were used. As they occurred in full bloom and at the time of crop harvest. Analyze plant height (AP), ear / panicle insertion height (AIEP), stem diameter (DC), dry leaf biomass (BF), stem (BC), ear / panicle (BEP) ), slope (BP) and total (BT), dry leaf biomass allocation (AF), stem (AC), ear / panicle (AEP) and tassel (AD), 100 grain weight (PG), grain per ear / panicle (PGEP), ear / panicle length (CEP), number of ears / panicle (NEP), profile plants (PPM) and survey (P). The use of AP, number of profiles (NP) and dry biomass per m-2 (BSM) is not allowed. Data were subjected to analysis of variance and, in the case of significance, a regression analysis. Data from each isolated culture were taxed and analyzed together as two cultures. There was no significant difference between DC, BF, BC, BEP, BT, PG, NEP, PPM and P. Without corn, as variables affected by the matocompetition of DC, CEP and BF, BC, BEP, BP, BT and AF. Harvest time. In the joint analysis, maize was more competitive, suffering less damage when compared to sorghum and as higher densities of corn plants caused by greater damage. The only interaction found was at the beginning, where sorghum was more negatively affected, especially at higher densities. Millet is as different as NP at harvest and BSM at two times if you develop better when competing with sorghum. Under the conditions imposed in this work, the hybrid XB6022 was the most sensitive to the compatibility of millet hybrid P3898.