树种重要值、树种多样性和土壤理化性质对土壤氨基糖的影响  

Effects of tree species importance,diversity and soil physicochemical properties on soil amino sugars

作　　者：黄海燕 唐慧敏 金鹭 施宇 宋晓倩 陈嘉琦 贺海升 张衷华[1,2,3,4] 唐中华 HUANG Haiyan;TANG Huimin;JIN Lu;SHI Yu;SONG Xiaoqian;CHEN Jiaqi;HE Haisheng;ZHANG Zhonghua;TANG Zhonghua(College of Chemistry,Chemical Engineering and Resource Utilization,Northeast Forestry University,Harbin 150040,Heilongjiang,China;Key Laboratory of Forest Plant Ecology,Ministry of Education,Northeast Forestry University,Harbin 150040,Heilongjiang,China;Engineering Research Center of Forest Bio-preparation,Ministry of Education,Northeast Forestry University,Harbin 150040,Heilongjiang,China;Heilongjiang Provincial Key Laboratory of Ecological Utilization of Forestry-based Active Substances,Northeast Forestry University,Harbin 150040,Heilongjiang,China;Experimental Center,Shenyang Normal University,Shenyang 110000,Liaoning,China)

机构地区：[1]东北林业大学化学化工与资源利用学院,黑龙江哈尔滨150040 [2]东北林业大学森林植物生态学教育部重点实验室,黑龙江哈尔滨150040 [3]东北林业大学林业生物制剂教育部工程研究中心,黑龙江哈尔滨150040 [4]东北林业大学黑龙江省林源活性物质生态利用重点实验室,黑龙江哈尔滨150040 [5]沈阳师范大学实验教学中心,辽宁沈阳110000

出　　处：《浙江农林大学学报》2024年第4期778-786,共9页Journal of Zhejiang A&F University

基　　金：黑龙江省自然科学基金资助项目(LH2021C003)。

摘　　要：【目的】土壤氨基糖是土壤微生物死亡残体的特异性标志物,对土壤碳、氮固存有重要作用。探究树种多样性和优势树种重要值对土壤氨基糖的影响机制。【方法】以东北林业大学实验林场为研究样地,采取0~20 cm的表层土壤,测定土壤葡萄糖(Glu)、土壤半乳糖(Gal)、土壤胞壁酸(Mur)及土壤总氨基糖(TA)质量分数,计算样地内树种多样性指数和优势树种重要值,通过相关分析、冗余分析、方差分解分析研究确定影响土壤氨基糖的主要因素及其贡献程度。【结果】(1)土壤葡萄糖、土壤半乳糖、土壤胞壁酸、土壤总氨基糖质量分数与土壤全氮质量分数、土壤电导率和土壤有机碳质量分数显著正相关(P<0.05);(2)土壤葡萄糖、土壤半乳糖、土壤胞壁酸、土壤总氨基糖质量分数与黑皮油松Pinus tabuliformis var.mukdensis重要值显著负相关(P<0.01);土壤葡萄糖、土壤半乳糖、土壤总氨基糖质量分数与蒙古栎Quercus mongolica重要值显著负相关(P<0.05);土壤葡萄糖、土壤总氨基糖质量分数与黄檗Phellodendron amurense、金银忍冬Lonicera maackii、胡桃楸Juglans mandshurica重要值均显著正相关(P<0.05);土壤半乳糖、土壤胞壁酸、土壤总氨基糖质量分数与梣叶槭Acer negund重要值显著正相关(P<0.05)。冗余分析发现:黑皮油松、蒙古栎不利于氨基糖积累,而黄檗、梣叶槭、金银忍冬、胡桃楸有利于土壤氨基糖的积累。(3)方差分解分析表明:树种重要值对土壤氨基糖质量分数变化的贡献程度(35.4%)显著高于树种多样性(6.4%)和土壤理化性质(17.2%)。【结论】通过增加梣叶槭、金银忍冬、黄檗和胡桃楸等树种来为维持较高的树种多样性,能更好地促进人工林土壤氨基糖的积累,进而改善土壤碳氮固存能力。[Objective]Soil amino sugars are specific markers of soil microbial death residues,and play an important role in soil carbon and nitrogen sequestration.This study aims to explore the impact mechanism of tree species diversity and dominant tree species importance on soil amino sugars.[Method]The experimental forest farm of Northeast Forestry University was taken as the research sample,and 0−20 cm surface soil was used to measure glucosamine(Glu),galactosamine(Gal),muramic acid(Mur)and total amino sugar(TA).The diversity index of tree species and important values(IV)of dominant tree species were calculated.The main factors and contribution affecting soil amino sugars were determined through correlation analysis,redundancy analysis,and variance decomposition analysis.[Result](1)The contents of Glu,Gal,Mur,TA were significantly positively correlated with those of total nitrogen(TN),electrical conductivity(EC),and organic carbon in soil(P<0.05).(2)The contents of Glu,Gal,Mur,TA were significantly negatively correlated with IV of Pinus tabulaeformis var.mukdensis(P<0.01).The contents of Glu,Gal,TA were negatively correlated with IV of Quercus mongolica(P<0.05).The contents of Glu and TA were significantly positively correlated with IV of Phellodendron amurense,Lonicera maackii,and Juglans mandshurica(P<0.05),while the contents of Ga,Mur and TA were significantly positively correlated with IV of Acer negundo(P<0.05).Redundancy analysis found that Pinus tabuliformis var.mukdensis and Q.mongolica were not conducive to the accumulation of amino sugars,while A.negundo,Phellodendron amurense,L.maackii,and J.mandshurica were conducive to the accumulation of amino sugars.(3)Variance decomposition analysis showed that the contribution of IV of tree species to changes in soil amino sugar content(35.4%)was significantly higher than that of tree species diversity(6.4%)and soil physical and chemical properties(17.2%).[Conclusion]The rich diversity of tree species maintained by increasing tree species such as A.negundo,L.maackii,P

关 键 词：树种多样性 树种重要值 土壤理化性质 土壤氨基糖 

分 类 号：S714[农业科学—林学]