학술논문
Growth and nutrition of cacao seedlings influenced by zinc aplication in soil/Crescimento e nutricao de mudas de cacaueiro em funcao da aplicacao de zinco no solo
Document Type
Periodical
Author
Source
Revista Brasileira de Fruticultura. December 1, 2015, p1053, 12 p.
Subject
Language
Spanish; Castilian
ISSN
0100-2945
Abstract
INTRODUCTION The cacao tree (Theobroma cacao L.) is a native species of the Amazon region, being under cultivation in tropical America by pre-Columbian peoples (DIAS, 2001). Currently, cacao production is [...]
Levels of Zn in tropical soils profoundly influences growth and nutrition of tree crops. Research was undertaken to assess the effect of soil Zn on growth and nutrition of clonal cacao tree seedlings of PH 16. Three acidic Oxisol soils differing in texture were used with nine doses of Zn (0, 1, 2, 4, 8, 16, 32, 48, and 64 mg [dm.sup.-3]). Rooted clonal seedlings were grown in plastic pot with 11 [dm.sup.-3] of the soils at varying Zn levels for 240 days. At harvest growth (dry matter mass of leaves, stems, shoots, roots, and total) and nutrient concentrations were determined. The clonal cacao seedlings showed differences for production of dry matter mass and foliar nutrient concentrations for P, K, Ca, Mg, Mn, Fe, Zn, and Cu. There was Zn toxicity in all soils. Index terms: Theobroma cacao L., micronutrient, calibration fertilization. Os teores de Zn em solos tropicais influenciam profundamente o sobre crescimento e a nutricao de culturas arboreas. Esta pesquisa foi realizada para avaliar o efeito de Zn no solo sobre o crescimento e a nutricao de mudas clonais de cacau da variedade PH 16. Tres Latossolos acidos com diferentes texturas foram adubados com nove doses de Zn (0; 1; 2; 4; 8; 16; 32; 48 e 64 mg [dm.sup.- 3]). Mudas clonais enraizadas foram cultivadas em vasos de plastico com 11 [dm.sup.-3] dos solos com niveis variaveis de Zn, por 240 dias. Na colheita, o crescimento (massa de materia seca de folhas, caules, brotos, raizes e total) e os teores de macro e micronutrientes foram determinados. As mudas clonais de cacau apresentaram diferencas para a producao de massa de materia seca e teores de nutrientes foliares para P, K, Ca, Mg, Mn, Fe, Zn e Cu. Houve toxidez de Zn em todos os solos. Termos para indexacao: Theobroma cacao L., micronutriente, calibracao de adubacao.
Levels of Zn in tropical soils profoundly influences growth and nutrition of tree crops. Research was undertaken to assess the effect of soil Zn on growth and nutrition of clonal cacao tree seedlings of PH 16. Three acidic Oxisol soils differing in texture were used with nine doses of Zn (0, 1, 2, 4, 8, 16, 32, 48, and 64 mg [dm.sup.-3]). Rooted clonal seedlings were grown in plastic pot with 11 [dm.sup.-3] of the soils at varying Zn levels for 240 days. At harvest growth (dry matter mass of leaves, stems, shoots, roots, and total) and nutrient concentrations were determined. The clonal cacao seedlings showed differences for production of dry matter mass and foliar nutrient concentrations for P, K, Ca, Mg, Mn, Fe, Zn, and Cu. There was Zn toxicity in all soils. Index terms: Theobroma cacao L., micronutrient, calibration fertilization. Os teores de Zn em solos tropicais influenciam profundamente o sobre crescimento e a nutricao de culturas arboreas. Esta pesquisa foi realizada para avaliar o efeito de Zn no solo sobre o crescimento e a nutricao de mudas clonais de cacau da variedade PH 16. Tres Latossolos acidos com diferentes texturas foram adubados com nove doses de Zn (0; 1; 2; 4; 8; 16; 32; 48 e 64 mg [dm.sup.- 3]). Mudas clonais enraizadas foram cultivadas em vasos de plastico com 11 [dm.sup.-3] dos solos com niveis variaveis de Zn, por 240 dias. Na colheita, o crescimento (massa de materia seca de folhas, caules, brotos, raizes e total) e os teores de macro e micronutrientes foram determinados. As mudas clonais de cacau apresentaram diferencas para a producao de massa de materia seca e teores de nutrientes foliares para P, K, Ca, Mg, Mn, Fe, Zn e Cu. Houve toxidez de Zn em todos os solos. Termos para indexacao: Theobroma cacao L., micronutriente, calibracao de adubacao.