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6 results on '"Lima, Paulo Sarmanho da Costa"'

1. DIVERSIDADE DE PLANTAS NO CERRADO BRASILEIRO: UM ENFOQUE EM Parkia platycephala

Author

Silva, Jarbson Henrique Oliveira, primary, Sousa, Márcia Vieira de, additional, Lima, Paulo Sarmanho da Costa, additional, Gomes, Regina Lúcia Ferreira, additional, Lopes, Ângela Celis de Almeida, additional, Valente, Sérgio Emílio dos Santos, additional, Silva, Verônica Brito da, additional, Peron, Ana Paula, additional, Martins, Lívia do Vale, additional, and Feitoza, Lidiane de Lima, additional

Published
2021
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3. Soil Chemical Quality in Integrated Production Systems with the Presence of Native and Exotic Tree Components in the Brazilian Eastern Amazon.

Author

Souza, Ivanderlete Marques de, Sagrilo, Edvaldo, de Oliveira Júnior, José Oscar Lustosa, Araújo, Maria Diana Melo, Muniz, Luciano Cavalcante, Costa, Joaquim Bezerra, Pompeu, Roberto Cláudio Fernandes Franco, de Sousa, Daiane Conceição, de Andrade, Hosana Aguiar Freitas, de Oliveira Neto, Edson Dias, Leite, Luiz Fernando Carvalho, Blanco, Flávio Favaro, Lima, Paulo Sarmanho da Costa, and Souza, Henrique Antunes de

Subjects
PALMS, SUSTAINABILITY, SOIL fertility, SOIL quality, CATCH crops, EUCALYPTUS
Abstract

Conservation systems involving trees enhance the sustainability of tropical soils. However, little is known on the effect of integrated systems with native and exotic trees on soil chemical quality in the eastern Amazon. We aimed to measure changes in soil chemical quality in integrated production systems in Pindaré-Mirim, Maranhão, Brazil. This study was carried out in 2017 and 2018, evaluating (i) perennial pasture; (ii) crop–livestock–forest integration-I (CLFI-I)—eucalyptus rows interspersed with maize + Urochloa brizantha intercropping; (iii) CLFI-II—babassu palm trees (Attalea speciosa Mart.) with maize + Megathyrsus maximus intercropping; and (iv) maize + M. maximus intercropping. Soil chemical attributes at depths of 0.00–0.10 m, 0.10–0.20 m, 0.20–0.30 m, and 0.30–0.50 m, forage productivity, and soil cover were evaluated. CLFI-II promoted the highest soil organic matter concentration in topsoil and highest pH, lowest Al3+ levels, and potential acidity (H+Al) at all soil depths. Soil under pasture showed the highest N, K+, Ca2+ concentrations, sum of bases, and cation exchange capacity. Changes in CLFI-II are associated with the babassu palm's ability to modulate the surrounding environment, giving the species a competitive advantage in anthropic environments. The time of adoption is crucial for improving soil fertility in the Brazilian eastern Amazon. Sustainable production systems in the region must comply with long-term management plans. [ABSTRACT FROM AUTHOR]

Published
2024
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5. Multivariate analysis of ‘bacuri’ reproductive and vegetative morphology

Author

Souza, Isis Gomes de Brito, Souza, Valdomiro Aurélio Barbosa de, Silva, Kaesel Jackson Damasceno e, Lima, Paulo Sarmanho da Costa, Souza, Isis Gomes de Brito, Souza, Valdomiro Aurélio Barbosa de, Silva, Kaesel Jackson Damasceno e, and Lima, Paulo Sarmanho da Costa

Abstract

The objective of this study was to characterize sixteen genotypes of P. insignis available in the Embrapa Meio-Norte germplasm collection (Teresina, Piauí, Brazil) with respect to 33 morphological traits relating to leaves, flowers, branches, fruits and seeds. Phenotypic variance among genotypes was estimated using the Mahalanobis distance technique and the unweighted pair group method with arithmetic mean analysis (UPGMA). The method of Singh (1981) was used to determine which of the traits contributed most to diversity within genotypes. The occurrence of phenotypic variability among P. insignis genotypes indicated that it would be possible to achieve positive gains with selection. The most distant genotypes were BGB 16 and BGB 48, while crosses between genotype BGB 48 and genotypes BGB 32 and BGB 56 offers the greatest potential as parental types for this fruit tree breeding programs . The flesh content, ovary and fruit length , ratio between fruit length and diameter were the characters that most contributed to diversity among the studied genotypes., O objetivo do trabalho foi caracterizar dezesseis genótipos de bacurizeiro disponível na Coleção de Germoplasma da Embrapa Meio-Norte (Teresina, Piauí, Brasil) com base em 33 caracteres relacionados à folha, flor, ramos, fruto e semente. A divergência fenotípica entre os genótipos foi estimada pela distância de Mahalanobis e a análise de agrupamento dos genótipos por meio do método hierárquico da ligação média não ponderada (UPGMA). O método de Singh foi utilizado na determinação de quais caracteres mais contribuem para a diversidade dos genótipos. Observou-se diversidade fenotípica significativa entre os genótipos estudados, indicando que é possível obter ganhos genéticos importantes por meio da seleção. Os genótipos BGB 16 e BGB 48 são os mais divergentes. Entretanto, cruzamentos entre o genótipo 48 e os genótipos BGB 32 e BGB 56 oferecem potencial como parentais em programas de melhoramento da frutífera. O teor de polpa, comprimento do fruto, comprimento do ovário e relação comprimento / diâmetro do fruto são os caracteres que mais contribuem para a diversidade entre os genótipos estudados.

Published
2016

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