木薯农艺性状及品质对不同海拔梯度的响应

为了探究木薯农艺性状及块根品质对不同海拔梯度的响应，进而明确海拔梯度变化对木薯生长的影响。以木薯品种‘SC205’、‘GR4’为材料，于800~1600 m的海拔上种植。同海拔木薯的株高、茎粗、主茎高和落叶高度随时间不断增加而增加，但同时间段，随海拔升高呈降低趋势，2个品种在8—10月生长最快，11月生长相对缓慢，到12月生长基本停止；随海拔梯度升高，同一木薯品种块根品质呈上升趋势，除粗纤维含量外，其他均差异达极显著；同海拔不同木薯品种间，除粗纤维含量外差异显著；块根品质含量最高多出现在海拔1400 m，最低在海拔1000 m或800 m。不同海拔下，海拔800 m、1000 m木薯生长旺盛，海拔1400 m块根品质相对较好，生产上应根据用途选择适宜的木薯种植海拔。

The Response of Agronomic Traits and Quality of Cassava to Different Altitude Gradients

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.