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甘蔗栽培的最适宜地区是热带地区,而有利的栽培地区,则是年平均气温在20℃以上,至于在17～18℃的等温线下的地区则被定为甘蔗栽培的界限地区。所以在日本,作为甘蔗北限地区来说,是在北纬31.5°,即九州本土的南部。日本的蔗区实际是种子岛以南的奄美群岛及冲绳县西南诸岛。这些地区的年平均气温大致是17℃以上,但也包括在12月～3月间,月平均气温为15℃以下的地区。12～3月期间,月平均气温为15℃以下时,会使这些地区造成宿根蔗萌芽延迟和缺
The most suitable area for sugar cane cultivation is the tropics, while in the favorable cultivation areas, the annual average temperature is above 20 ℃, while the areas under the 17-18 ℃ isotherms are the boundaries of sugar cane cultivation. Therefore, in Japan, as a northernmost area of sugarcane, it is located at latitude 31.5 °, the southern part of Kyushu. The sugarcane area in Japan is actually the Amami Islands south of Tanegashima and the southwestern islands of Okinawa. The average annual temperature in these areas is generally above 17 ℃, but also in December to March, the monthly average temperature of 15 ℃ below the area. During the period from March to March, when the monthly average temperature is below 15 ℃, the germination of sugarcane roots will be delayed and absent in these areas