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Archivos Latinoamericanos de Produccion Animal
Asociacion Latinoamericana de Produccion Animal
ISSN: 1022-1301
EISSN: 2075-8359
Vol. 15, No. 4, 2007, pp. 152-156
Bioline Code: la07022
Full paper language: Spanish
Document type: Research Article
Document available free of charge

Archivos Latinoamericanos de Produccion Animal, Vol. 15, No. 4, 2007, pp. 152-156

 es Uso de funções discriminantes para comparação de cultivaresdos gêneros Cynodon check for this species in other resources e Digitaria check for this species in other resources quanto à produção dematéria seca e teores de macronutrientes
Zanine, A. de Moura; Dias, P. Francisco; Souto, S. Manhães; Ferreira, D. de Jesus; Santos, E. Mauro & Pinto, L.F. Batista

Resumen

Foi realizado um experimento no Centro Nacional de Pesquisa de Agrobiologia, Seropédica-RJ, com objetivo de comparar as gramíneas Coast cross e Tifton 85, do gênero Cynodon check for this species in other resources , e as gramíneas Suázi ( Digitaria swazilandensis check for this species in other resources ) e Transvala (D. decumbens), do gênero Digitaria check for this species in other resources , quanto à produção de matéria seca (MS) e teores de macronutrientes da parte aérea e sistema radicular, em 15 amostras de cada cultivar, coletadas no período das chuvas (primavera/verão). A análise discriminante demonstrou que as variáveis Mg, Ca e MS na parte aérea e P e N na raiz foram importantes no processo de discriminação dos cultivares estudados. O cultivar Suázi foi diferente dos demais avaliados quanto a produção de MS e aos teores de Mg e Ca na parte aérea, além do P e N na raiz. Os cultivares Tifton 85 e Coast cross, apesar de serem do mesmo gênero, diferem quanto à produção de MS e aos teores de Mg e Ca na parte aérea, além do P e N na raiz. Algumas amostras dos cultivares Tifton 85 e Coast cross apresentaram semelhança com o capim Transvala, com relação à produção de MS e aos teores de Mg e Ca na parte aérea, além de P e N na raiz.

Palabras-clave
Analise discriminante, Coast cross, Macronutrientes, Matéria seca, Suázi, Transvala, Tifton-85

 
 en Discriminant functions for comparison of cultivars of the Cynodon check for this species in other resources and Digitaria check for this species in other resources genus a the dry matter production and macronutrients contents
Zanine, A. de Moura; Dias, P. Francisco; Souto, S. Manhães; Ferreira, D. de Jesus; Santos, E. Mauro & Pinto, L.F. Batista

Abstract

An experiment was carried out at the National Center of Research of Agrobiology, Seropédica-RJ, with objective of evaluating the grasses Coast cross ( Cynodon check for this species in other resources spp.) and Tifton 85 ( Cynodon dactylon check for this species in other resources (L.)), of the Cynodon genus, and the grasses Suázi ( Digitaria swazilandensis check for this species in other resources ) and Transvala ( Digitaria decumbens check for this species in other resources ), of the Digitaria check for this species in other resources genus, through the discriminant analysis. The evaluated variables were: dry matter production (DMP) and contents of nitrogen (N), phosphorus (P), magnesium (Mg) and calcium (Ca) in the shoot and root on 15 samples of each grasses, accomplished in the period of the rains (spring/summer). The discriminant analysis demonstrated that the variables Mg, Ca and dry matter production (DMP) in shoot, and P and N root are important in the discrimination process of the Coast cross, Tifton 85, Suázi and Transvala cultivars. Suázi cultivar is clearly different from the others cultivars, in relationship to Mg and Ca contents and DMP at the shoot, P and N at the root. O Tifton 85 and Coast cross cultivars, in spite of being of the same genus, differ in relationship to Mg and Ca contents and DMP at the shoot, match and N at the root. Some samples of the Tifton 85 and Coast cross cultivars can be similar to the grass Transvala, in relation to the Mg, Ca and DMP contents in shoot, P and N root.

Keywords
Coast cross, Discriminant analysis, Dry matter, Macronutrient, Suázi, Transvala, Tifton 85

 
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