从一般早熟温州蜜柑中发生特早熟温州蜜柑的频率是4—5万分之一。日本至今已发现的特早熟温州蜜柑超过100个,其中12个品系已经注册,6个品系正在申请注册。胁山早生即为其中之一。比一般早熟种如兴津、立间、宫川、松山、龟井、三保等要早采半月左右。胁山早生,发现于日本佐贺县浜玉镇,从宫川早生中选出,是特早生温州蜜柑中最 Occurred from the general precocity of Wenzhou mandarin, the occurrence of especially early maturing mandarin frequency is 4-5 ten thousandths. Japan has so far been found in the early maturing Wenzhou Satsuma more than 100, of which 12 strains have been registered, six strains are applying for registration. Lying one’s early life is one of them. Than the general precocious species such as Xingjin, legislation, Miyagawa, Matsuyama, Kamei, three security and so on to take a half or so early. Maruyama early life, found in Hamamachi, Saga Prefecture, Japan, elected from Miyagawa early birth, is the most early freshman Satsuma most