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作者于1983～1986年研究了金冠/M27的农业生物学特特。栽植距离为4×1米,整形为“柱形”。研究表明,在果园生长的头3～4年树体增长最明显。3年生树高1.8米,树冠呈圆形,底部宽1.3米,在以后生长和结果年份内,新梢生长明显减弱,树冠体积增长不明显。6年生时,树高平均为2米,树冠底部宽1.3～1.5米。营养面积的开垦率(按树冠水平投影计算)为38%(通用开垦率为50～60%),也就是说,4×1米栽植的树冠对果园面积的开垦率仅为最佳值的63～76%。树冠容积也有类似的规律性。
The author studied the Golden Delicious / M27 agricultural biology special from 1983 to 1986. Planting distance of 4 × 1 meter, shaped into “cylindrical”. Research shows that in the first 3 to 4 years orchard growth of the most obvious tree growth. 3-year-old tree height of 1.8 meters, the crown was round, bottom 1.3 meters wide, in the future growth and results of the year, significantly reduced the growth of new shoots, crown volume growth is not obvious. 6 years old, the average tree height of 2 meters, the bottom of the crown wide 1.3 to 1.5 meters. The reclamation rate of nutrition area (calculated by crown level projection) is 38% (general reclamation rate is 50-60%), that is to say, the reclamation rate of canopy of 4 × 1 m for the orchard area is only the best 63 ~ 76%. Canopy volume has a similar pattern.