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天津位于北纬39°06′。夏季气温高,雨量集中,对苹果的花芽分化及果实着色不利,特别是元帅品种,着色不良,果形指数小,采前落果重,不耐贮藏。我场于1981年从国外引进“首红”及“新红星”苹果接穗,高接在大树上与一般栽培的“红星”、“元帅”品种进行对比观察。
Tianjin is located at latitude 39o 06 ’north. High summer temperatures, rainfall concentrated on apple flower bud differentiation and fruit coloring adversely, especially the Marshal varieties, poor coloring, fruit shape index is small, plucked before harvest heavy, impatient storage. My field in 1981 from abroad to introduce the “first red” and “New Star” apple scion, followed by the tree and the general cultivation of “Red Star”, “Marshal” varieties were compared.