杨树插干与带蔸造林生长及根系发育比较

Comparison of Populus simonii Growth and Root Development Between Cuttage Forestation and Afforestation with Roots

以江汉平原4个杨树主栽品种为试验材料,分别进行插干和带兜造林,比较两种造林方式生长和根系发育差异。结果发现:两种造林方式,生长差异显著,插干造林具有明显的生长优势。进一步对两种造林方式根系发育进行比较发现,前期根系发育差异不大,随着时间增长,插干造林的生根数量、根重、生根区间长度等特征都显著大于带兜造林。正是由于插干造林根系发达,分布均匀,吸收根和运输支撑根合理配置,更利于水分、养分的吸收运输,且不易倒伏,最终相比带兜造林表现出显著的生长优势。

In order to provide technical support for the efficient afforestation of Populus simonii,four main Populus simonii varieties in Jianghan Plain were used as experimental materials to compare the differences of growth and root development between two afforestation methods.The results showed that difference of growth was significant between two afforestation methods,and cuttage forestation had obvious growth advantage.Further comparing the root development of the two afforestation methods,it was found that there was little difference in early root development.As time went on,the rooting number,root weight and length of rooting interval of the cuttage forestation were significantly higher than the afforestation with root.The cuttage forestation had the well-developed root system,uniform distribution,absorption root and transport support root reasonable allocation,it was more conducive to moisture and nutrient absorption,and not easy to lodging,and finally,the cuttage forestation showed significant growth advantages to the afforestation with root.