樟子松人工成熟林凋落物产量及影响因素  

Litter yield of mature artificial forest of Pinus sylvestris var.mongolica and influencing factors

作　　者：张野 雷泽勇[1,2] 赵国军 周凤艳[1] 杨晓红 杨雨欣 ZHANG Ye;LEI Zeyong;ZHAO Guojun;ZHOU Fengyan;YANG Xiaohong;YANG Yuxin(School of Environmental Science and Engineering,Liaoning University of Engineering and Technology,Fuxin 123000;Institute of Degraded Land Ecological Governance,Liaoning University of Engineering and Technology,Fuxin 123000;Liaoning Institute of Sand Land Management and Utilization,Fuxin 123000;Qingsongling Forest Farm,Jianping County 122400,China)

机构地区：[1]辽宁工程技术大学环境科学与工程学院,阜新123000 [2]辽宁工程技术大学退化土地生态治理研究院,阜新123000 [3]辽宁省沙地治理与利用研究所,阜新123000 [4]辽宁国有建平县青松岭林场,建平122400

出　　处：《干旱区资源与环境》2023年第11期132-139,共8页Journal of Arid Land Resources and Environment

基　　金：国家自然科学基金项目(31570709)资助。

摘　　要：樟子松作为北方关键的造林树种,在引种到章古台后,其成熟期提前,养分输入主要依赖凋落物。为了揭示樟子松人工成熟林凋落物产量的变化机理并为林地更新提供科学依据,以辽宁省彰武县章古台镇的樟子松林地为研究对象,对其年凋落物总量、各组分凋落量的月动态以及凋落量的影响因子进行分析。结果表明,进入成熟期后,樟子松人工林凋落总量的月动态呈现双峰型。在5月,各组分凋落量相对均衡;而在10月,凋落总量的绝大多数成分为针叶,占比达到90.86%。在不同林分密度和不同林分生长阶段,针叶均是樟子松凋落物的主要成分,其占凋落总量的比例均超过一半。林分生长阶段和林分密度的差异对凋落总量及各组分凋落量均无显著影响(P>0.05),但随着林分生长阶段和林分密度的增加呈上升趋势。此外,风速是影响枝条凋落量的关键因素,而月平均温度则是影响凋落总量的关键因素,降水量对各组分凋落量的影响较小。在625N·hm^(-2)条件下,环境因子更能满足樟子松人工林在成熟期的生长需求。As a key afforestation tree species in the northern region,Pinus sylvestris var.mongolica matures earlier than in its provenance after being introduced to Zhanggutai,and its nutrient input mainly relies on litter.To elucidate the mechanism of litter yield variation in mature P.sylvestris var.mongolica plantations and provide a scientific basis for forest land regeneration,the annual total litter,monthly dynamics of litter components in the P.sylvestris var.mongolica forestland in Zhanggutai Town,Zhangwu County,Liaoning Province and the influencing factors were analyzed.The results showed that after entering the mature period,the monthly dynamics of total litter amount in the P.sylvestris plantation exhibited a bimodal pattern.In May,the litter volume of each component was relatively balanced,while in October,the majority of the total litter consisted of needles,accounting for 90.86%.Needles were the predominant component of litter of P.sylvestris var.mongolica plantation,comprising over half of the total litter at different forest densities and growth stages.The differences in stand growth stage and stand density did not have a significant impact on the total litter amount and the amount of each litter component(P>0.05),but exhibited an increasing trend with increasing stand growth stage and stand density.Additionally,wind speed emerged as a key factor affecting branch litter amount,while monthly average temperature was identified as a key factor influencing the total litter amount.Precipitation had a relatively minor impact on the litter amount of each component.Under the condition of 625N·hm^(-2),environmental factors were better able to meet the growth requirements of P.sylvestris var.mongolica plantations during the mature period.

关 键 词：樟子松成熟林 凋落物产量 凋落物组成 气候因子影响 林分密度 

分 类 号：S718[农业科学—林学]