论文部分内容阅读
青森县是日本苹果主产区,苹果栽培面积占全国总面积的46%。自然条件适于发展苹果,年降雨量1200～1400毫米,温度基本上可以满足苹果生长发育的需要,冬季最低温度-13～-14℃,果树可以安全越冬。青森县苹果栽培已有一百多年的历史。1897年开始出口苹果。1902年引进元师系。1921年引进矮化栽培,1926年引进美国红
Aomori Prefecture is the main producing area of Japan’s apple, apple cultivation area of 46% of the total area. Natural conditions suitable for the development of apples, the annual rainfall of 1200 ~ 1400 mm, the temperature can basically meet the needs of apple growth and development, the lowest temperature in winter -13 ~ -14 ℃, fruit trees can be safe wintering. Aomori apple cultivation has a history of one hundred years. In 1897 began to export apples. In 1902 the introduction of yuan division. Introduction of dwarfing cultivation in 1921, the introduction of American Red in 1926