Qualidade da semente de milho cultivado em diferentes espaçamentos e controles de plantas daninhas.

Abstract

The process of weed interference in maize caules problems in the development of the plant, the production process, the quality of the grain and the operationalization of the harvest. It aimed to to research to evaluate the physical and physiological characteristics of com seeds, originated from cultures with different forms of weed control. The material used was the cultivar double hybrid com AG-1051, the semiearly cycle and high size, produced by Agroceres company. The seeds were sown in the field in an experimental design of randomized blocks (DBC), with eight treatments and four replications. The treatments consisted of eight weed control methods: contrai without control in single rows (1); unsprayed in double rows (2)l integrated contrai with mulch over chemical control. associated with Atrazine + Soberan herbicides in single rows (3); integrated control with mulch over chemical contrai. associated with Atrazine + Soberan herbicides in double rows (4)l Mechanical control with hoes in single rows (5)l Mechanical contrai with hoes in double rows (6); chemical control with mixing Atrazine + Soberan herbicides in single rows (7)l chemical contrai with mixing Atrazine + Soberan herbicides in double rows (8). After the harvest of com and stored for three months, the seeds were evaluated according to the following characteristics: purity, moisture content, thousand seed weight, electrical conductivity, com test, tetrazolium test, germination test, radicle length, emergency field, infested test and biometric test. The characteristic purity of the seeds was influenced by control methods, as well as emergency, fresh weight and dry planta, germination, vigor, seed weight and moisture. The seed size and length of radicle were influenced by managements isolated unsprayed and chemical weed contrai. The spacing of 1.20 m had greater contribution to the physical and physiological seed quality. The electrical conductivity of seeds was more affected by the plots without contrai. Therefore, the quality of maize seed is affected by weed contrai methods using the interspecific competition and reduce culture space.