观察品种以贵州果科所的富丽、红星为主。是本所76年由稀植加密而成的14年生乔化密植园,株行距3×3.5米。当前树高4米左右,冠径5～6.5米,平均新梢40.5厘米。园区地势低洼,土层满厚、肥沃,40厘米以下为粘重黄壤,透水性差,地下水位高。近年来每株秋季施肥200～300斤,根据果树生长发育及营养状况,分别追施花前、壮果、采果肥,及时防除病虫害,叶片维持到冬季正常脱落。在修剪上,改冬季一次修剪为四季修剪,以控制和调节树体营养。经几年实践,效果良好。单株最高产量由78年的57斤上升为80年134斤。贵阳地区3月下旬至4月初,常遇寒潮,低温阴雨,严重影响苹果的受粉,降低座果率。为此,对提高座果率的措 Observed varieties of Guizhou Fruit Branch of the rich, Red Star-based. Our firm is a 14-year-old Qiaohua plantation which was sparsely populated in 76 years. The line spacing is 3 × 3.5 meters. The current tree height of 4 meters, 5 to 6.5 meters in diameter, the average shoot 40.5 cm. Low-lying park, the soil is full, fertile, 40 cm below the sticky heavy yellow soil, poor water permeability, groundwater level is high. In recent years, each autumn fertilization 200 ~ 300 pounds, according to the growth and development of fruit trees and nutritional status, were topdressing, strong fruit, fruit fat, timely control of pests and diseases, the leaves remain normal to fall off in winter. In the pruning, change the winter pruning for the four seasons to control and regulate the tree nutrition. After several years of practice, the effect is good. The highest yield per plant increased from 57 pounds in 78 years to 134 pounds in 1980. Guiyang region from late March to early April, often cold, low temperature overcast, seriously affecting the apple powder, reducing the rate of fruit set. To this end, to improve the rate of fruit set