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一、试验目的我省属中亚热带温暖湿润气候,适宜甘蔗栽培。但气温最高的赣南地区,1月份平均气温仍然只有6.2～8.5℃,每年在此前后均有低温侵袭,极端最低温在摄氏零下4.1～9.8度,致使甘蔗地上部份不能安全越冬。受冻甘蔗产量减少,糖分转化加剧,晚熟品种无法成熟,因而多在立冬后至大寒边制糖,压榨期前后约80天左右。七十年代开始换栽比较耐寒的赣蔗1号、8号和纳印310等品种后,榨期略可延长,但迟至3月份以后产量和含糖量都有很大影响。而且因为现有当家种均属中熟类型,即使较早熟的秋植蔗、宿根蔗也要在12月中旬才逐渐成熟,提早压榨糖分含量都不够高。
First, the purpose of the experiment My province is subtropical humid and humid climate, suitable for sugar cane cultivation. However, the highest temperature in southern Jiangxi Province, the average January temperature is still only 6.2 ~ 8.5 ℃, each year before and after the low-temperature invasion, the extreme minimum temperature of 4.1 to 9.8 degrees Celsius below zero, resulting in the above-ground parts of sugar cane can not be safely wintering. Decreased sugar cane yield, increased sugar conversion, late maturing varieties can not mature, and thus mostly in the winter after the winter to the big sugar, about 80 days before and after the pressing period. After the seventies began to transplanting more tolerant Gan Jiangxi sugar cane No. 1, No. 8 and Indiana 310 and other varieties, squeezed slightly longer, but as late as late in March yield and sugar content have a great impact. And because the existing family species are matured, even the more mature autumn sugarcane, ratoon sugarcane will not mature until mid-December, the early sugar content is not high enough.