Patrícia Bertoncelli

Caracterização agronômica de genótipos de milho para a produção de silagem

The aim of this work was to evaluate the agronomic characteristics and yield of six maize genotypes cycle super early in the production of silage in Dois Vizinhos, Parana. The experiment was conducted at experimental area of the Universidade Tecnologica Federal do Parana. The average height difference among cultivars, ranging from 1.62 (Al-Piratininga) to 0.90 m (BMX 739). The hybrid AGN30A03 showed less resistance to lodging of plants and culm breakage. The genotypes BMX 739, CD 304, PRE22T11 and Al-Piratininga obtained the highest yield of fresh forage (638.81, 455.18, 620.98, 460.12 g plant-1, respectively). The variety Al-Piratininga presented a higher number of ears per plant (1,11) than those of the other varieties. Among the materials tested, the genotype BMX 739, showed the highest dry matter yield per area and the percentage share of spike (29 %) and grains (26 %) in the phytomass.

Caracterização bromatológica e agronômica de genótipos de milho para produção de silagem

The aim of this study was to evaluate the nutritive value and agronomic characteristics of maize genotypes for the silage production cultivars test center network of Super Early National Corn Genotypes; and to assess whether the genetic background (hybrids simple, doubles, triples, intervarieties and cultivated varieties) or the hardness of the grains (hard, soft flint and dent) may change the indication of maize cultivars for silage. The experiment was conducted at the experimental Federal Technological University of Parana (Campus Dois Vizinhos). Thirty-two genotypes were harvested when the grains were in the dough soft dough stage, micro-ensiled in PVC silos, silage cutters and after 53 days after silage cutters. We evaluated the characteristics and chemical plant parameters of each genotype. We evaluated the relationship between genetic bases, hardness of the grain and individual characteristics of genotypes related to the production of corn silage. There was no significant difference between the contrast formed between the genetic and hardness of the grains for the characteristics studied. However, it was possible to identify superior genotypes for the production of silage whit bases in dry matter production by genotype YG AS 1555, AS 1572 YG, 30A37, 30A77, 20A78, DX 908, DX 603, 2A550, 2B433, AL2007A, EMBRAPA 1F640, PRE 22T10, PREXT0109, PRE 22D11, DKB330 YG (Test).

Caracterização bromatológica de silagens de milho de genótipos super precoce

The annual availability of corn genotype is very large, requiring a proper assessment to be indicated for the production of silage. The aim of this study was to evaluate the chemical characteristics of corn genotypes for silage production, and assess whether the grain genetic basis or hardness may change the indication of corn cultivars for silage. The experiment was conducted at the experimental area of the Universidade Tecnologica Federal of Parana, in the randomized block design, evaluating 30 genotypes of experiment Super Early South. It was evaluated the chemical characteristics of the genotypes and, after they were grouped according to the characteristics of genetic basis and of grain texture. It was found that the genotypes of the experiment South Super Early cannot be differentiated according to the genetic basis of grain and texture for all traits. However, they can be distinguished by the dry matter silage.