一年生插条苗的根原基形成时间、部位和分化的过程，以及培土措施对根原基分化的影响。
At the same time the differentiation process of the root primordium, and the effect of hilling up with earth on the process have been carefully followed.
本文对十个杨树种类(其中有无性系、变种，和种)一年生插条苗的叶、茎和根的生长及相互关系进行了研究。
This paper deals with leaf, stem and root growth of ten kinds (including clones, varieties and species) of one year poplar seedlings grown from cuttings.
链盘式投苗全自动插条机的研制，可为丰产原料林插条作业提供一种新机型，以提高林业机械化装备整体水平。
The development of the automatic cutting planter provides a new machine for cutting planting operation of high yield raw material forest and improves the level of forest equipment.
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