成龄栗树应用多效唑试验张继朴（河北省农林科学院昌黎果树研究所０６６６００）板栗新梢生长量大，而分枝较少，因此进入成龄结果期后，树冠过大而内膛空虚，结果部位迅速外移，这是造成产量低的重要原因。为探讨多效唑对板栗成龄树抑制新梢生长，增加光秃部位发枝数量，... Application of paclobutrazol to adult chestnut trees ZHANG Ji-Pu (Changli Fruit Research Institute, Hebei Academy of Agricultural and Forestry Sciences, 066600) The shoots of chestnuts grow in large numbers with fewer branches, so after entering the mature age, the canopy is too large and the internal cavity is empty. Rapid relocation, which is an important reason for the low yield. In order to investigate the effect of paclobutrazol on adult chestnut tree growth inhibition of shoots, increase the number of bare branches, ...