Studies on mechanical damage and its influence on storability in sugar beets [Beta vulgaris], 1: Influence of each step of mechanical harvesting on root injury, rotting of stored roots and loss of sucrose
1989
Miyamoto, K. (Obihiro Univ. of Agriculture and Veterinary Medicine, Hokkaido (Japan)) | Matsuda, K. | Sato, T. | Michiba, M. | Yamashima, Y. | Hara, T. | Tamaki, T. | Tsuru, R. | Kanzawa, K. | Imura, E. | Hayasaka, M. | Saito, H. | Akutsu, M. | Matsuda, S.
Examinations were made in Obihiro in 1986 and 1987 to analyze the root damage caused by harvesters at each step of operation, and to find the ways of reducing the damage. The harvesters were used: a conventional one-row trailed tanker type and an improved conventional type attached with cushioning rubber at all steps. The following results were obtained: 1. The conventional type caused severe root injuries at two operation steps: the step of lifting by two-rod conveyers running at different speeds, and the step of dropping roots into a tank. 2. The damage from the improved type was decreased to one third below the conventional type at most of the steps. However, the improved type was not yet satisfactory, because the sucrose content of the harvested roots declined considerably during 132 days of storage as compared with the hand-harvested roots in 1987. 3. It should be necessary to make further studies for improving the quality and shape of the cushioning rubber, and for developing an equipment that will reduce the speed of dropping roots into the tank
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