摘要
通过在胜利林场设置四大地块,每个地块又分为4个小块为一组,4个小块地采用亮整地方式,设置不同杨树栽植深度,对杨树不同栽植深度与当年成活率和当年枝条生长量相关性分析,建立相关性方程,结果表明:①当年成活率和当年枝条生长量没有关系,苗木的成活和枝条生长是相连接的两个阶段,因此苗木当年成活率和当年枝条生长量没有相关性;②随着整地深度的不断增加,土壤中的含水率会逐渐增加,因此栽植后缓苗期的苗木随着整地深度的增加,受土壤含水率胁迫性逐渐减小,使得苗木的成活率随着整地深度而提高;③通过栽植深度与当年成活率和当年枝条生长量相关性分析,得出了苗木的成活率和枝条生长量在一定范围内随着整地深度增加而提高的结论;④不同的整地方式对苗木的也是有影响的,对于新植林地无论是苗木成活率还是枝条生长量,相较于穴状整地,机械深坑整地方式更适宜苗木.
Abstract
This study established a correlation equation by setting up four large plots in a mechanical forest farm,each of which was divided into four small groups.The four plots were prepared using a bright leveling method and different planting depths of poplar trees were set.The correlation analysis between different planting depths of poplar trees and the survival rate and branch growth of the current year was conducted,and a correlation equation was established.It was found that:①there is no relationship between the survival rate and branch growth of the current year,and the survival rate and branch growth of seedlings are two connected stages.Therefore,there is no correlation between the survival rate and branch growth of seedlings in the current year.② As the depth of land preparation increases,the moisture content in the soil will gradually increase.Therefore,as the depth of land prep-aration increases,the stress of soil moisture content on seedlings during the slow seedling stage after planting gradually decreases,resulting in an increase in the survival rate of seedlings with the depth of land preparation.③ By analyzing the correlation between planting depth and the survival rate and branch growth of the current year,it was concluded that the survival rate and branch growth of seedlings increase within a certain range with the increase of soil preparation depth.④ Different land preparation methods also have an impact on seedlings.For newly planted forests,mechanical deep pit preparation is more suitable for seedlings in terms of survival rate and branch growth compared to hole preparation.
NETL
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万方数据