Desbrotamento de tubérculos-semente de batatinha

[摘要] Three preliminary plot experiments and eight field experiments with Irish potato seed tubers were anahsed in order to find out the effect of desprouting prior to planting upon the whole production, percentage of failures and of large tubers (more than 80 grams). The following conclusions can be drawn: a) seed tubers in which the sprouts were left gave higher yields, a smaller percentage of failures and greater percentage of large tubers ; b) when desprouted only once, it was noticed that yield was smaller but not significantly ; the number of large tubers was smaller and the percentage of failures was a little higher ; c) when the tubers were desprouted twice it was less favorable than a single removal of the sprouts ; the tuber yield and the number of large tubers were smaller and the percentage of failures was still higher ; d) when the sprouts were removed three times the yield was still lower; the percentage of failures was very high but the quantity of large sized tubers, as compared with the number when desprouted twice, did not change. The tubers desprouted three months after the begining of sprouting, gave the poorest results particularly when it was done more than once.