Sistema radicular do fórmio, sisal e bambu imperial

Medina, Júlio César; Inforzato, Romeu; Pettinelli, Armando; Pinto, Luiz Carlos de Toledo

doi:10.1590/S0006-87051963000100006

Resumos

Os autores apresentam e discutem os resultados de estudos preliminares sôbre o sistema radicular do fórmio (Phormium tenax Forster), sisal (Agave sisalana Perrine) e bambu .imperial (Bambusa vulgaris Schrad. var. vittata A. ,& C, Riv.). Concluem, que o sistema radicular do fórmio é relativamente raso, o do sisal bastante superficial é o do bambu imperial se limitada às primeiras carnadas do solo.

Results of preliminary studies on root-systems of New Zealand flax (Phormium tenax Forster), sisal (Agave sisalana Perrine), and imperial bamboo (Bambusa vulgaris Schrad. var. vittata A. & C. Riv.) plants by the method of soil block, are apresented and discussed by the authors. According to local soil conditions, it is concluded that the root-system of New Zealand flax is relatively superficial, with the main concentration of roots in the 12 in. soil top layer. In sisal, the root-systems of the three plants investigated were found to occur in the soil surface layer, with more of 90% of the roots in the top 6 in. Finally, in the imperial bamboo clump atudied, the main concentration of roots was found in the layer 6-12 in. deep.

Júlio César Medina^I; Romeu Inforzato^II; Armando Pettinelli^III; Luiz Carlos de Toledo Pinto^IV

^IEngenheiro-agrônomo, Seção de Plantas Fibrosas

^IIEngenheiro-agrônomo, Seção de Fisiologia

^IIIEngenheiro-agrônomo, M'siação Experimental de Tatuí, Instituto Agronômico

^IVEngenheiro- agrônomo, Fazenda Pinhal

RESUMO

Os autores apresentam e discutem os resultados de estudos preliminares sôbre o sistema radicular do fórmio (Phormium tenax Forster), sisal (Agave sisalana Perrine) e bambu .imperial (Bambusa vulgaris Schrad. var. vittata A. ,& C, Riv.).

Concluem, que o sistema radicular do fórmio é relativamente raso, o do sisal bastante superficial é o do bambu imperial se limitada às primeiras carnadas do solo.

SUMMARY

Results of preliminary studies on root-systems of New Zealand flax (Phormium tenax Forster), sisal (Agave sisalana Perrine), and imperial bamboo (Bambusa vulgaris Schrad. var. vittata A. & C. Riv.) plants by the method of soil block, are apresented and discussed by the authors.

According to local soil conditions, it is concluded that the root-system of New Zealand flax is relatively superficial, with the main concentration of roots in the 12 in. soil top layer. In sisal, the root-systems of the three plants investigated were found to occur in the soil surface layer, with more of 90% of the roots in the top 6 in. Finally, in the imperial bamboo clump atudied, the main concentration of roots was found in the layer 6-12 in. deep.

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LITERATURA CITADA

Recebido para publicação em 21 de setembro de 1962.

1. FRANCO, C.M. & INFORZATO, E. O sistema radicular do cafeeiro nos principais tipos de solo do Estado de São Paulo. Bragantia 6:[443]-478. 1946.
2. GLOVER, J. The root-system of Agave sisalana in certain Eeast African soils. Emp. J. Exp. Agric. 8(25):11-20. 1939.
3. ____________The root-system of sisal in some East African soils. East. Afr. Agric. Jour. 5:18-22. 1939.
4. KHANNA, K. L. Some observations on bamboos. Indian J. Agric. Sci. 1:473.479. 1931.