Abstract:

In order to explore the response of agronomic traits and root quality of cassava to different altitude gradients, and then clarify the impact of altitude gradient changes on the growth of cassava, in this study, cassava variety ‘SC205’ and ‘GR4’ were used as test materials and planted at the altitude of 800-1600 m. The plant height, stem diameter, main stem height and deciduous height of cassava at the same altitude increased with the time, but it showed a decreasing trend with the increase of altitude during the same time period. The growth of the two varieties was the fastest from August to October, was relatively slow in November, and basically stopped in December. With the increase of altitude gradient, the root quality of the same cassava variety showed an upward trend, and all quality indicators had extremely significant differences except the crude fiber content. The quality of different cassava varieties at the same altitude was significantly different except the crude fiber content. The highest content of good quality root mostly appeared at the altitude of 1400 m, and the lowest were at the altitude of 1000 m or 800 m. At different altitudes, cassava grew vigorously at the altitude of 800 m and 1000 m. The quality of cassava root was relatively good at the altitude of 1400 m. Therefore, the suitable altitude for cassava planting should be selected according to the purpose of production.

Key words: cassava, agronomic traits, quality, altitude gradient