不同海拔甘蔗蔗糖分的积累特征

Accumulation Characteristics of Sucrose in Sugarcane at Different Altitudes

以甘蔗品种闽糖69/421为试材,分别种植于400,600,800,1 000,1 200,1 400,1 600 m海拔高度的蔗区,对不同海拔的甘蔗成熟期的蔗糖分的积累特征进行研究。结果表明：不同甘蔗蔗糖分积累时期受海拔影响不一样,在蔗糖分积累初期,海拔4000--1 000 m时,甘蔗蔗糖分受海拔的影响较大,随着海拔升高,蔗糖分降低;但在海拔1 000--1 600 m,甘蔗蔗糖分变化不大。而在甘蔗蔗糖分积累中后期,海拔对甘蔗蔗糖分积累的影响变小,随着海拔升高,甘蔗蔗糖分积累呈现总体下降,不同海拔间蔗糖分起伏较大,但下降幅度不大。甘蔗蔗糖分积累除受海拔高度的影响,还受到多种环境因素的影响。

The sucrose accumulation characteristics of sugarcane planted at different altitudes in different months were analyzed. Sugarcane cuhivar Mintang 69/421 was planted in the field at the altitudes of 400 m, 600 m, 800 m, 1 000 m, I 200 m, 1 400 m and 1 600 m, respectively, and the Brix or sugarcane sucrose content was measured in different months. The altitude was found to give different influences to the sucrose content of the sugarcane at different accumulation stages. The sucrose content of the sugarcane was affected greatly at the alti- tude between 400 m and 1 000 m at the early accumulation stage, and it decreased as the altitude increases. But the sugarcane sucrose content did not change much at the altitude between 1 000 m and 1 600 m. The altitude had slight influence on the sucrose accumulation at the middle and late accumulation stages. As the altitude in- creased the sugarcane sucrose accumulation generally tended to decrease but not considerably, and the sucrose content changed much at different altitudes. Numerous other environmental factors beside altitude gave influence to sugarcane sucrose accumulation.