Influence of the seed-tuber size on yield and yield parameters in potatoes
2001
Divis, J. | Barta, J. (Jihoceska Univ., Ceske Budejovice (Czech Republic). Zemedelska Fakulta)
In a potato-growing area above 400 m sea-level on a plot with the soil of brown type (loamy-sand soil) the impact of tuber size on yields and yield elements was studied in the years 1996-1998. A high impact of the particular year on the yield and yield elements was recorded in the described experiments. The tuber yield responded positively to the growing tuber size. The highest yields in both mentioned varieties were achieved in the variant with the largest seed tubers. The increasing seed-tuber size resulted in the growing percentage of emerged plants. Larger tubers were accompanied by the growth of the number of stems per plant. In both varieties, a growing number of stems per plant as the result of the growing seed tuber size was recorded. The growing size of tubers resulting in the decrease of average weight per tuber can be considered a trend. The results show that the growing size of seed tubers results in an increased yield security. Larger than standard seed tubers result in the increased weight and costs for the necessary seed tubers. To respond to the tuber size of acknowledged seed-tubers by double sorting. In larger seed tubers a larger seeding distance between tubers should be preferred and the number of individuals per hectare within the recommended density for the given utility class should be reduced.
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