Resumo
This paper describes an experiment with factorial design and two levels of treatment, used in testing fertilizer applications for tobacco seed beds. The fertilizers employed were : Chilean nitrate, superphosphate, potassium chloride, and cotton seed meal. Tobacco plants were grown in ten liter clay pots containing a steam sterilized soil composed of equal parts* of thoroughly mixed sub-soil and surface washed sand. Each of the sixteen treatments tested was applied to six pots and these were divided into three replications of two pote each. Measurements of height and weight of the plants were taken about two months after the seed germinated. An analysis of the data obtained is presented and shows that under the conditions of the test, all fertilizer applications which contained phosphate had a significant influence on plant growth. The NPK treatment was found to be the most advantageous. It was further determined that nitrogen and potash had a significant effect on plant growth in a group of eight treatments analyzed.
Adubação para viveiro de fumo. Experiência preliminar em vasos
S. Ribeiro dos SantosI; C. G. Fraga Jr.II
IEngenheiro agrônomo, Secção de Fumo, Plantas Medicinais e Inseticidas
IIEngenheiro agrônomo, Secção de Técnica Experimental e Cálculo, Instituto Agronômico de Campinas
SUMMARY
This paper describes an experiment with factorial design and two levels of treatment, used in testing fertilizer applications for tobacco seed beds. The fertilizers employed were : Chilean nitrate, superphosphate, potassium chloride, and cotton seed meal. Tobacco plants were grown in ten liter clay pots containing a steam sterilized soil composed of equal parts* of thoroughly mixed sub-soil and surface washed sand. Each of the sixteen treatments tested was applied to six pots and these were divided into three replications of two pote each.
Measurements of height and weight of the plants were taken about two months after the seed germinated. An analysis of the data obtained is presented and shows that under the conditions of the test, all fertilizer applications which contained phosphate had a significant influence on plant growth. The NPK treatment was found to be the most advantageous. It was further determined that nitrogen and potash had a significant effect on plant growth in a group of eight treatments analyzed.
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LITERATURA CITADA
- 1. Cochran, W. G. Some difficulties in the statistical analysis of replicated experiments. The Empire Jour, of Exp. Agr. 6 : 157-175. 1938.
- 2. Garner, W. W. Em The production of tobacco, pág. 1-156, The Blakiston Co., Philadelphia. 1946.
- 3. Lima, A. R. Instruções práticas para instalação e tratamento do viveiro de fumo. Bol. Inst. Agr. do Est, S. Paulo (Campinas) 12 : 1-13. 1936.
- 4. Rodrigues de Carvalho, M. J. Em A estatística na experimentação agrícola. Pág. 1 - XV + 1 - 174. Sá Costa, Lisboa. 1946.
- 5. Yates, F. Em The design and analysis of factorial experiments. Imp. Bur. Soil Sci., Tech. Comm. 35 : 1937.
Datas de Publicação
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Publicação nesta coleção
08 Jun 2010 -
Data do Fascículo
Dez 1948
