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经四年的研究证明,在13年生樟子松无性系嫁接种子园中,通过截顶,使母树的结实层下移,其平均单株球果数比不截多31.6%,平均球果重量下降9.2%,平均单株成熟种子数比不截多18.9%:喷洒赤霉素30PPm,使母树平均球果数的重量、成熟种子数量分别增加6.1%、3.93%和16.2%;弱度修剪,使球果数量、重量分别增加41.1%和5.6%;强度修剪球果数量减少3.6%,但球果重量增加10.4%。
After four years of research shows that in the 13-year-old Pinus sylvestris var. Clonal seed orchard, truncated, so that the stump of the parent tree down, the average number of balls per plant is not intercepted more than 31.6% average cone weight Decreased by 9.2%, the average number of mature seeds per plant was 18.9% less than the average: 30PPm of gibberellin was sprayed, the weight of the average number of fruit trees and the number of mature seeds increased by 6.1%, 3.93% and 16.2% The number and weight of cones increased by 41.1% and 5.6% respectively. The number of intensive coniferous fruits decreased by 3.6%, but the weight of cones increased by 10.4%.