山杏合格苗木高度的推算

对通榆县瞻榆林场山杏圃地1年生苗高度和山杏林地1年生树造林时的苗木高度以相同标准进行分组，比较二者各组比例的变化，推算出合格造林苗的高度，以确保造林达到更高的成活率。推算结果为55cm以上高度为合格苗。分析了山杏苗造林苗高对造林当年生长量的影响，结果为山杏造林苗高与当年的生长量呈负相关，合格苗各组的生长量之间差异不显著。讨论了山杏根系质量对造林成活率的影响、合格苗在造林中以及不利的林地条件下均具有的优势、为提高合格苗占比在育苗过程中应采取的必要措施。

Height Estimation of Qualified Armeniaca sibirica Seedlings

The height of 1-year seedlings from the Armeniaca sibirica Nursery in Zhanyu Forest Farm of Tongyu county and the height of 1-year seedlings from the afforestation Armeniaca sibirica were grouped to compare the change of proportion in each group, and then to calculate the height of qualified afforestation seedlings,so as to ensure a higher survival rate of afforestation. The results showed that the height above 55 cm was the qualified seedlings.The influence of the height of Armeniaca sibirica seedlings on the growth amount of afforestation was analyzed. So there was a negative correlation between the Armeniaca sibirica seedling height and the growth amount in the current years,there was no significant difference between the growth amount of the qualified seedlings.The effect of Armeniaca sibirica root quality on afforestation survival rate,qualified seedlings in afforestation and unfavorable condition had an advantage,the necessary measures for qualified seedlings had also been discussed in this paper. ;