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Magdeburg, Univ., Med. Fak., Diss., 2012

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Magdeburg, Univ., Med. Fak., Diss., 2012

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The authors carried out joint analyses of data referring to six experiments with varieties of sugar cane, carried out by SEGALLA and ALVAREZ in six locations in the State of S. Paulo, Brasil. The analyses showed that for cane or sugar yield, either for plant-cane or for plant-cane together with the first two ratoons, the best five varieties were CB 40-69, CB 41-76, CB 40-13, CB 40-19 and Co 419. The yield of sugar cane/for all varieties studied is given below, in metric tons produced in plant cane and the first two ratoons. Varieties Yield of sugar cane (tons/hectare) CB 40-69 205.2 CB 41-76 204.5 CB 40-13 199.4 CB 40-19 192.4 Co 419 192.1 CB 38-30 182.1 CB 41-70 181.5 Co 413 177.5 CB 38-22 174.4 CB 36-14 172.8 Co 290 166.6 CB 41-35 147.9 The least significant difference by Tukey's test, at the 5% level of probability, is A = 28.3 metric tons/hectare.

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At the 2nd. Department of Zootechny of the E. S. A. L. Q., in Piracicaba, between 1953 and 1955 an experiment of sugar cane varieties was carried out, with the objective of discovering varieties to substitute "Taquara" (the variety most widely used) and Co 290 (the most recommended). The former was condemned as being too susceptible to cane smut and the latter showes signs if degeneracy. In the experiment, 8 varieties were used with 3 replications in randomized blocks, in 3 rows each. The cane was crop not in the same period, but when they were at comparable ripeness (70 cm of apparent culm). They were crop twice during the year, with a sharp hoe near the soil. The summary of the results and the statistical analyses are shown in tables 1 to 3, showing the possibility of there being 3 groups: A superior one composed of Co 419, a median one, in decreasing order of production, composed of Kassoer, CB 40-69. Co 413, IAC 36-25 and POJ 161 and an inferior group composed of Co 290 and Taquara. There is a possibility that POJ 161 belongs to the last group. Nevertheless, this variety is not recommend because of its susceptibility to smut. As Kassoer is more healthy, vigorous and enduring than Co 419 and other varieties, it is shown recommendable. IAC 36-25 is being recommended presently for forage since its productions is lower than Kassoer, placing 5th productivity, although statistical significance was not detected. As our final conclusions, Co 419, Kassoer, CB 40-69, Co 413 and IAC 36-25 can be planted as forage while POJ 161, Co 290 and Taquara should not. The last two were exactly those used as forage reserve in the 2nd. Department at the beginning of the experiment.

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Magdeburg, Univ., Med. Fak., Diss., 2013

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Magdeburg, Univ., Med. Fak., Diss., 2013