一朵开放的苹果花,其花柄的长度因苹果的品种不同而异,它们约在3—6厘米间变化,花托似黄豆粒大小(图1-1)。当花萼由放射状的平展转为向前顺直时,标志着花已授粉,花托和子房开始发育,沿萼片和花柄向两端发生组织增生,使花托由圆形变为椭圆形,此时花托和花柄的界线就模糊不清了[图1-2(花谢后的5—20天左右)]。接着出现以横径增长为主的扩展期,在果实逐渐变为纵、横径相等[图1-3(5月中旬至6月下旬)],才出现纵、横径增长速度大体相似的时期[图1-4(6月下旬至采收)],在纵、横径进入等值期后,横径生长速度逐渐减缓。此期间纵径增长主要是由果肩及顶部向两 An open apple blossom, the length of the flower stalk vary according to the apple variety, they vary between about 3-6 cm, receptacle like bean size (Figure 1-1). When the calyx from the radial flat forward straight forward, marking the flowers have been pollinated, receptacle and ovary began to develop along the sepal and pedicel at both ends of the tissue hyperplasia, the torus from round to oval, this time Torus and flower stalk boundaries blurred [Figure 1-2 (spent about 5-20 days after the flower)]. Followed by the extension of horizontal growth. When the fruit gradually becomes vertical and the horizontal diameter is equal [Figure 1-3 (mid-May to late June)], the period when the growth rates of vertical and horizontal growth rates are generally similar [Figure 1-4 (late June to harvest)], after the vertical and horizontal diameter into the equivalent period, the diameter growth rate gradually slowed down. Longitudinal growth during this period mainly by the fruit shoulder and the top to two