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试验树于1975年春定植2个小区、1976年春定植4个小区及对照区,小区面积1亩;品种选用“秋蜜”和“新世纪”,以2:1成行栽植与为授粉树;每亩栽植密度为110(对照区)、138、354、420、532,648和1080株;栽植方式有单行、双行和三行,畦宽均为3米;树形按不同密度分别选用疏层形(对照)、圆柱形、双臂双层篱形、双臂单层棱形、单干棱形、之字形等。在年施基肥和追肥3～4次及正常病虫防治等栽培管理下,一年生苗栽后第二年均有少量结果,1978年(栽后3～4年)6个试
The experimental tree was planted in two districts in the spring of 1975. In the spring of 1976, four residential areas and control areas were planted. The area of the plot was 1mu. The varieties were “Qiumei” and “New Century”, and were planted in 2: 1 rows with pollinated trees; Planting density of 110 (control area), 138,354,420,532,648 and 1,080; planting methods are single, double and three lines, width are 3 meters; dendritic shape were selected according to different densities (control ), Cylindrical, double-arm double-arm shape, double-arm prismatic prism, single prism, zigzag and so on. In the annual base fertilizer and top dressing 3 to 4 times and the normal pest control and other cultivation and management, annual seedlings planted in the second year after a small amount of results, 1978 (3 ~ 4 years after planting) 6 trials