洛阳市周山森林公园林分植硅体碳的迁移转化与存贮机制  

Migration,Transformation and Storage Mechanism of Phytolith Carbon in Zhoushan Forest Park in Luoyang City

作　　者：田耀武[1] 张子铮 李晓林 张楚磊 刘亚丽 TIAN Yao-wu;ZHANG Zi-zheng;LI Xiao-lin;ZHANG Chu-lei;LIU Ya-li(School of Forestry,Henan University of Science and Technology,Luoyang,Henan 471003;Henan Forestry Ecological Construction Development Center,Zhengzhou,Henan 451000)

机构地区：[1]河南科技大学林学院,河南洛阳471003 [2]河南省林业生态建设发展中心,郑州451000

出　　处：《陕西林业科技》2023年第6期1-7,共7页Shaanxi Forest Science and Technology

基　　金：国家自然科学基金项目(32271848);河南科技大学博士基金项目。

摘　　要：植硅体固碳是生物地球化学固碳的关键机制,深刻影响着陆地硅-碳耦合循环。分别选取河南省洛阳市周山森林公园银杏、苦楝、雪松和侧柏等4种林分,采集林分叶片、凋落物和0~30 cm土壤样品,测定4种林分叶片→凋落物→土壤连续体中植硅体、植硅体碳质量分数,计算植硅体碳贮量。结果表明:(1)周山森林公园不同林分对叶片、凋落物和土壤植硅体含量和植硅体碳贮量的贡献并不相同。银杏叶片植硅体含量(7.36‰)、植硅体碳(2.255%)、植硅体碳/干物质(2.42‰)和植硅体碳贮量(0.48 t·hm^(-2))均表现为最高;银杏凋落物植硅体含量(10.25‰)、植硅体碳/干物质(1.87‰)和植硅体碳贮量(0.265 t·hm^(-2))表现为最高,而雪松植硅体碳含量(3.975%)最高;银杏土壤植硅体碳/干物质(7.58‰)和植硅体碳贮量(0.445 t·hm^(-2),以CO_(2)计)最高,而雪松植硅体含量(38.7‰)和苦楝植硅体碳含量(2.255%)最高;(2)周山森林公园林分叶片、凋落物和土壤连续体植硅体含量、植硅体碳贮量差异显著。4种林分的土壤植硅体含量、植硅体碳/干物质和植硅体碳贮量均显著高于叶片和凋落物,而雪松和土壤植硅体碳含量却低于凋落物,表明植硅体碳在迁移转化过程中受树种的影响,具有一定的不稳定性;(3)周山森林公园4种典型林分中植硅体碳储量在叶片(0.098~0.195 t·hm^(-2))→凋落物(0.075~0.265 t·hm^(-2))→土壤(0.214~0.445 t·hm^(-2))生态连续体上均表现为上升的趋势。本研究中周山森林公园银杏和苦楝等阔叶树种植硅体碳汇潜力有强于针叶树种的趋势,在树种改造中可提高阔叶树种的种植比例,制定符合实际的植硅体固碳管理措施,发挥树种的植硅体固碳潜力。Phytolith carbon sequestration is a key mechanism of biogeochemical carbon sequestration.The content and storage of phytolith carbon are affected by many environmental factors.Leaf,litter and 0~30 cm soil samples were collected from four forest stands of Ginkgo biloba,Melia azedarach,Cedrus deodara and Platycladus orientalis in Zhoushan Forest Park,Luoyang City,Henan Province.The mass fractions of phytolith and phytolith carbon in leaf→litter→soil continuum of four forest stands were determined,and the phytolith carbon storages were calculated.The results showed that:(1)The contribution of different forest stands to phytolith content and phytolith carbon storage in leaves,litter and soil was different.The phytolith content(7.36‰),phytolith carbon(2.255%),phytolith carbon/dry matter(2.42‰)and phytolith carbon storage(0.48 t·hm^(-2))of Ginkgo biloba leaves were the highest.The phytolith content(10.25‰),phytolith carbon/dry matter(1.87‰)and phytolith carbon storage(0.265 t·hm^(-2))of Ginkgo biloba litter were the highest,while the phytolith carbon content(3.975%)of Cedrus deodara litter was the highest.The ratio of phytolith carbon/dry matter(7.58‰)and the carbon storage of phytolith(0.445 t·hm^(-2))in Ginkgo biloba soil were the highest,while the content of phytolith in Cedrus deodara(38.7‰)and the carbon storage of phytolith in Melia azedarach(2.255%)were the highest.(2)The phytolith content and phytolith carbon storage of leaf,litter and soil continuum in Zhoushan Forest Park were significantly different.The soil phytolith content,phytolith carbon/dry matter and phytolith carbon storage in the four forests were significantly higher than those in leaves and litters,while the content of phytolith carbon in cedar and soil was lower than that in litter,indicating that phytolith carbon was affected by tree species in the process of migration and transformation and had certain instability.(3)The phytolith carbon storage in the four typical stands of Zhoushan Forest Park showed an upward trend in the

关 键 词：植硅体 碳贮量 周山森林公园 迁移 储存 

分 类 号：S718.5[农业科学—林学]