Urochloa Cultivated in Soil with Aluminium: A Development and Stomatal Approach
Lucas Aparecido Manzani Lisboa *
Integrated College Stella Maris (FISMA), Educational Foundation of Andradina (FEA), Andradina, São Paulo, Brazil and College of Technology and Agricultural Sciences, São Paulo State University (Unesp), Dracena, São Paulo, Brazil
Gustavo Henrique de Oliveira Dias
Integrated College Stella Maris (FISMA), Educational Foundation of Andradina (FEA), Andradina, São Paulo, Brazil
Kauê Barbarotto Ribeiro
Integrated College Stella Maris (FISMA), Educational Foundation of Andradina (FEA), Andradina, São Paulo, Brazil
Hiago Augusto Amaral Sacco
Integrated College Stella Maris (FISMA), Educational Foundation of Andradina (FEA), Andradina, São Paulo, Brazil
João Vitor Rodrigues Padovan
Integrated College Stella Maris (FISMA), Educational Foundation of Andradina (FEA), Andradina, São Paulo, Brazil
Gabriel Banos Rodrigues
Integrated College Stella Maris (FISMA), Educational Foundation of Andradina (FEA), Andradina, São Paulo, Brazil
Gabriel Geminiano da Silva
Integrated College Stella Maris (FISMA), Educational Foundation of Andradina (FEA), Andradina, São Paulo, Brazil
Alan dos Santos Cardoso
Integrated College Stella Maris (FISMA), Educational Foundation of Andradina (FEA), Andradina, São Paulo, Brazil
Leandro Barradas Pereira
Integrated College Stella Maris (FISMA), Educational Foundation of Andradina (FEA), Andradina, São Paulo, Brazil
Cássia Regina de Avelar Gomes
Integrated College Stella Maris (FISMA), Educational Foundation of Andradina (FEA), Andradina, São Paulo, Brazil
*Author to whom correspondence should be addressed.
Abstract
Some Brazilian soils present low fertility, acidity and also toxicity caused by the presence of aluminium, leading to a lower development of forages. In view of the above, this work aimed to know Urochloa cultivated in soil with aluminium: a development and stomatal approach. The experimental design was a factorial of 3x5, with three cultivars of Urochloa brizantha: Marandu; Paiaguás and Piatã, and five concentrations of aluminium in the soil: 2.0; 4.0; 8.0; 16.0 and 32.0 mmol dm-3 of Al, with four replications, a total of 60 plots. Sixty days after the harvest the following parameters were set: number of leaves (NF); plant height (PH); dry mass of the aerial part (DMAP). The lower or abaxial epidermal impression of the fragments collected using cyanoacrylate ester was used to determine: Stomata Density (SD) and stomatal functionality (SF). The presence of aluminium in the soil negatively influenced the development of plants. All Urochloa cultivars presented similar responses as exposed to different doses of aluminium in the soil. Doses above 2.0 mmol of aluminium in the soil harmed the development of U. brizantha. The cultivar Marandu presented the highest number of leaves and presented better development
Keywords: Marandu, Paiaguás, Piatã, forage, production