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以4个扁桃品种为试材,采用Logistic曲线对其实生苗高与地径生长过程进行拟合,其拟合相关系数均达0.990 0以上,并估测了速生期的2个拐点及其长度。结果表明:扁桃实生苗高、径生长均符合“S”型曲线,年生长可划分为生长初期、速生期、硬化期3个时期。“莎车一号”、“莎车五号”、“莎车九号”、“莎车十八号”4个品种扁桃的地径生长速生期起始时间比苗高生长早12、14、16、12d;地径生长结束时间分别比苗高生长晚2、4、3d;“莎车九号”的径生长结束时间分别比苗高生长早3d;4个品种扁桃的地径生长持续时间均比苗高生长长14、18、13、15d。不同扁桃品种苗高、地径连日生长量曲线均为双峰型。其中,苗高生长高峰分别出现在5月中旬和7月中旬,而地径生长高峰分别出现在7月上旬和8月上旬。
Four almond varieties were used as test materials to test their seedling height and diameter growth by using Logistic curve. The correlation coefficient of the four almonds was 0.990 0, and the two inflection points of fast growing period and its length . The results showed that the seedling height and diameter growth of almond were in line with the “S” curve, and the annual growth could be divided into three periods: early growth, fast growth and hardening. “Shache car ”, “car number five ”, “car number 9”, “car number” The growth of seedling height was 12, 14, 16 and 12 days earlier; the ending time of diameter growth was 2, 4 and 3 days later than that of seedling height respectively; the diameter growth end of “Shache 9” The diameter growth of four cultivars Almond was longer than the height of 14th, 13th, 13th and 15th days. Different almond varieties seedling height, diameter day-by-day growth curve are bimodal. Among them, the height growth peak appeared in mid-May and mid-July, respectively, while the peak height growth appeared in early July and early August respectively.