2008年低温冰冻灾害对甘蔗生产的影响

在正常的自然情况下,甘蔗生产受到天气的影响是有限的。然而,当甘蔗遭遇到罕见的、大范围的、持续低温冰冻的极端恶劣天气时,在不同水平的等高线地带调查发现,甘蔗受到灾害后生长点、蔗茎组织均受损伤或坏死;新台糖22号、新台糖16号、园林6号、桂引9号糖分在32d内分别下降1.64、0.55、1.04、0.45、平均下降率为6.4%;同时,直接影响宿根蔗和自留蔗种繁殖的亩出苗数、出芽率、有效茎、平均株高等农艺性状。

Under regular natural situation, the sugarcane production were influence of the weather were limited. However, the growing point and the organization of sugarcane stem were injured or necroticed in different horizontal contour line zone when the rare ,big range , sustained cryogenic freezing weather have arrived. The sugar of T22, T16 ,YL8 ,GY9 have come down respectively 1.64 , 0.55, 1.04, 0.45 in 32 days, the average rate of decline being 6.4;At the same time, a direct impact on the sucrose contents such as the sprout number, budding rate , effective stem , average plant height which were reproduced by ratoon sugarcane and sugarcane species retention, compared with the calendar year, which had a significant difference.