杨树1年生整株苗造林树体控制技术研究

为了论证杨树1年生整株苗造林树体控制技术中最适宜的截干高度以及后期采用何种主干控制技术能使苗木获得较好的生长,本研究采取双因素完全随机试验设计,设置不同截干高度和不同主干控制方式两个因素进行试验。结果表明:1年生整株苗造林树体控制技术的苗木造林平均成活率达97.4%以上,显著高于常规整株苗造林的平均成活率;合理截干高度为距地面1.6~1.8 m;定干修剪方法与竞争枝修剪方法联合使用是最佳的主干控制技术;与常规整株造林苗木相比较,该技术可提高当年生苗木平均高生长达15%以上。

Study on tree control technology of one-year-old whole seedling of Poplar L.

In order to demonstrate the most suitable height of trunk cutting in the afforestation control technology for one-year-old whole poplar seedling and suitable trunk control technology for seedling growth in the later stage,a two factor completely randomized trial design was adopted in this study,with two factors of different cutting heights and different trunk control methods.The average survival rate of tree control technology of one-year-old whole seedling afforestation was higher than 97.4%,which was significantly higher than the average survival rate of the conventional whole seedling forestation.The reasonable cutting height of tree control technology of one-year-old whole seedling afforestation was 1.6~1.8 m from the ground.The combination of fixed stem pruning method and competitive pruning method was the suitable trunk control technology.Compared with the conventional whole seedling afforestation,this technology can increase the average height growth of current year seedlings by more than 15%.