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Bragantia

Print version ISSN 0006-8705

Abstract

MENDES, J. E. Teixeira. Ensaio de variedades de cafeeiros III. Bragantia [online]. 1951, vol.11, n.1-3, pp.29-43. ISSN 0006-8705.  https://doi.org/10.1590/S0006-87051951000100005.

The coffee varietal trial was initiated at the Campinas Experimental Station in 1931. The first harvest was gathered in 1935. The results for the period 1935-38 were published in 1939 and the united results for 1935-46, in 1949. The present paper describes the individual observations for the years 1947 to 1950 and examines the results for the whole period from the beginning (1935-1950). The trial proceeded normally in the years 1947-50. Adequate fertilizers were applied, the ground was cleaned regularly and the process of harvesting was satisfactory. The mean yield was studied year by year. During the period, Bourbon amarelo always attained first place while the other varieties varied in placing. The order of the varieties, in respect of the total yield for 1947-50, was : Bourbon amarelo (yellow Bourbon), Bourbon vermelho (red Bourbon), Sumatra, Maragogipe, Nacional and Amarelo de Botucatu. The variety which was the earliest to produce mature fruits was Amarelo de Botucatu, followed by Sumatra, Nacional, Bourbon vermelho, Bourbon amarelo and finally Maragogipe. The variety producing the largest seeds was Maragogipe : Nacional, Amarelo de Botucatu and Sumatra produced seeds of intermediate size, while the smallest were those of Bourbon vermelho and Bourbon amarelo. The analysis of the data for the whole period of the trial, i. e., for sixteen harvests, shows the following : a)  the yield of Bourbon amarelo is significantly higher than that of Bourbon vermelho. b)  the yield of Bourbon vermelho is significantly higher than that of Sumatra. c)  the yield of Sumatra is significantly higher than those of Maragogipe, Nacional and Amarelo de Botucatu. d)  the yields of the last three do not differ significantly among themselves. e)  the rate of improvement of yield of Bourbon amarelo is greater than that of Bourbon vermelho. f)  the rate of improvement of yield of Maragogipe is greater than those of Nacional and Amarelo de Botucatu.

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