为了促进樟子松母树林结实量,我们于1985年秋,在红花尔基林场已划定的优良林分内设置试验区,进行了系统地疏伐促进结实试验,试验设置4个处理水平、3次重复,每区组要求林分状况相同,整个试验区3.2ha,每个区组0.8ha,试验区编组如表1。在每个试验区组小区内进行立木编号,每木检尺,测量树高及有关遗传品质的表型选择的形质因子(冠幅、冠长、侧枝粗、分 In order to promote Pinus sylvestris var. Mongolica, in the autumn of 1985, we set up a pilot area in the demarcated fine stands of Honghuaerji forest farm, and systematically thinning and promoting the sturdy test. Four levels of treatment were set in the experiment, 3 times repeated, each group requires the same stand condition, the entire test area 3.2ha, 0.8ha for each block, the test area as shown in Table 1. In each experimental plot group, the physical factors (crown width, crown length, collaterals, and branches) of standing number, length of wood, height of tree and related phenotype of genetic quality