Abstract
The experiment was conducted at the Experimental Farm of the Federal University of Mato Grosso in the municipality of Santo Antonio do Leverger, State of Mato Grosso, Brazil to evaluate the agronomic characteristics of corn hybrids in the cultivation of second crop for silage production. The experimental design was carried out with randomized blocks with 23 treatments (hybrids) and three replications. Corn hybrids from different seed companies and recommended for the midwestern region of Brazil, were used. The agronomic traits were: stem diameter (cm), plant height and ear insertion (m); yield of green matter (ton. ha -1 ), percentage of spike, stem and leaves in green mass; ear productivity (ton. ha -1 ), dry matter content of stem + leaf and whole plant. Hybrids BF 9304, DKB 370, 177 DKB, BF 9534, BF 9417, AG 5020, BE 9701, P 3021 and P 30F98 had the highest production of green matter, plant height and spike insertion. The hybrid BF 9304 was also prominent for spike percentage (50.55%).
Highlights
Climate seasonality is a regional phenomenon in the Brazilian savannah where rainfall is concentrated between October and March, with the three-month period December-February characterized by the highest rainfall rate
Differences (p < 0.05) among hybrids were assessed with regard to productivity of green matter (PGM), ranging between 16.40 and 29.62 ton. ha-1
This was perhaps due to the fact that PGM is affected by soil characteristics and by climatic conditions during growth with mean rainfall and evaporation rates, 479 and 533 mm, respectively, and a water deficit of 54 mm (Figure 1)
Summary
Climate seasonality is a regional phenomenon in the Brazilian savannah where rainfall is concentrated between October and March, with the three-month period December-February characterized by the highest rainfall rate. The agronomic characteristics of corn hybrids in second crop cultures for the production of silage in the State of Mato Grosso, Brazil, are evaluated.
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