Agronomical characterístics of corn at different maturation stages

Authors

  • Hélio Henrique Vilela
  • Adauton Vilela de Rezende Universidade José do Rosário Vellano, Faculdade de Agronomia e Zootecnia, Alfenas, MG
  • Antonio Ricardo Evangelista Universidade Federal de Lavras, Departamento de Zootecnia, Lavras, MG
  • Denismar Alves Nogueira Universidade José do Rosário Vellano, Faculdade de Agronomia e Zootecnia, Alfenas, MG
  • Geraldo Benedito de Souza Almeida Universidade José do Rosário Vellano, Alfenas, MG

Keywords:

dry matter, yield, silage

Abstract

This research work was conducted in the agricultural season of 2005/2006, on the José do Rosário Vellano University farm at Alfenas/MG, with the objective of evaluating the agronomic characteristics of corn cultivars at different maturation stages. The experimental design was in randomized blocks with four replicates in the split plot scheme in time. Lower values of plant height (2.47m) and ear insertion (1.27m) were found for the cultivar GNZ 2004. The cultivars P30S40 and P30F90 reached greatest plant height (2.66 and 2.73m), its being the greatest percentage of lodged plants (3.61% ha-1), observed for the cultivar P30F90. The DM contents increased with the physiological evolution of the plant, the highest average content of DM appeared place when kernels presented the formed black layer (BL) (44.78%). The majority of the cultivars ensiled at the ½ milk line presented DM contents (35.79%) most adequate for ensiling. The DM yield ranged from 15.07t ha-1 (AG1051) to 24.75t ha1 (P30S40). The highest values for kernel DM yield were observed with the kernels at 2/3 ML (9.65t ha-1) and BL (9.88t ha-1). The plant height is the factor determining on the percentage of lodged plants and the best maturation stage for ensiling was with the reduction of the milk line at the half of the kernel. The cultivars GNZ 2004, AG1051 and P30F90 are more suitable for silage-making with high DM yields and percentage of kernels.

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Published

2008-02-18

Issue

Section

FORAGE CROPS AND PASTURES

How to Cite

Agronomical characterístics of corn at different maturation stages. (2008). Bulletin of Animal Husbandry, 65(2), 123-130. http://35.198.24.243/index.php/bia/article/view/1132

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