摘要
为探讨农田防护林合理经营的最佳途径，本文从林带木材生物学特性研究入手，针对杨树农田防护林带不同品种、不同立地、不同行位和不同年龄木纤维长度的变化规律进行了研究，结果表明，杨树林带木纤维长度的变化主要受品种和年龄的影响，与林带特殊生境无显著相关；通过林带纤维长度频率分布和木纤维长度与年龄相关关系的分析，建立了一系列相关模型，据此得出了林带木纤维长度相对稳定的年龄；该年龄即为农田防护林带开始进入全面有效防护农田状态时的年龄，此时林带所达到的树高可作为农田防护林规划设计的成林高。由此为农田防护林带的经营提供了可靠的木材生物学依据。
In order to find the best way of managing shelterbelts,5 poplar tree species were selected from shelterbelts for studying fiber length.Based on the relationships between the fiber length and tree species,fiber length and site conditions,and fiber length and ages,the following results were obtained:the fiber length is determined mainly by species and age,and it is not significantly related to special site conditions of shelterbelts.Based on the distribution of fiber length, and the relationship between fiber length and age,a series of models about fiber length-age were established, and the relatively stable ages of fiber length were also obtained,the height of tree at the relatively stable ages can be considered as Hi(L=n*Hi)during designing shelterbelts.The above results can provide feasible evidence for shelterbelt management.
出处
《林业科学》
CAS
CSCD
北大核心
1994年第1期50-56,共7页
Scientia Silvae Sinicae
基金
国家自然科学基金
