摘要
【目的】利用生态过程中多重化学元素的平衡关系,揭示营养元素相互作用的变化规律,了解多重化学元素质量平衡及其对生态交互作用的影响。分析4种类型水曲柳人工林间树种叶片-凋落物-土壤以及同一水曲柳人工林不同组分间碳(C)、氮(N)、磷(P)的含量及其生态化学计量特征,为水曲柳人工林的混交树种选择、叶片-凋落物-土壤中的养分调节及水曲柳人工林的合理施肥提供理论参考。【方法】在东北林业大学森林培育实验站,以天然林带状皆伐后营造的29年生水曲柳纯林、长白落叶松水曲柳混交林、红皮云杉水曲柳混交林和红松水曲柳混交林为对象,野外样地调查取样,室内测定叶片、凋落物、土壤的有机C、N、P含量,分析比较了4种类型水曲柳人工林叶片-凋落物-土壤的C、N、P含量及其化学计量比[碳氮、碳磷、氮磷质量比,即m(C)∶m(N),m(C)∶m(P),m(N)∶m(P),分别表示为C/N、C/P、N/P]特征。【结果】水曲柳与长白落叶松叶片的N、P含量显著高于红皮云杉和红松叶片中的N、P含量;水曲柳纯林凋落物的N、P含量显著高于3种混交林凋落物的N、P含量;4种林型土壤C、N、P含量差异显著,C以长白落叶松水曲柳混交林土壤的为最高,N、P以水曲柳纯林土壤的为最高,C、N、P皆以红松水曲柳混交林土壤的为最低;4种林型叶片到凋落物的C、N、P含量平均降低率分别为18.98%、32.12%与21.95%;凋落物到土壤的C、N、P含量平均降低率分别为81.37%、50.73%与3.49%;混交林叶片到土壤的C、N、P含量平均降低率分别为84.90%、66.55%与24.67%;红皮云杉和红松叶片的C/N、C/P显著高于水曲柳、长白落叶松叶片,N/P皆以长白落叶松、红皮云杉和红松显著低于水曲柳;凋落物C/N和C/P以红皮云杉水曲柳混交林和红松水曲柳混交林显著高于水曲柳纯林和落叶松水曲柳混交林,N/P以水曲柳纯林高于3种混交林;土壤C/N
【Objective】Using the balance relationship of multiple chemical elements in the ecological process, we investigated nutrient elements interactions, and analyzed the balance between multiple chemical qualities, and their effect on ecological interactions. We aimed to determine the similarities and differences of C, N, P content, and their ratios in the leaf-litter-soil system among different types of Fraxinus mandshurica plantations. In addition, we investigated possible relationships between different components of the same plantation type, and provided theoretical reference for mixed tree species selection, nutrient regulation, and fertilization methods to F. mandshurica plantations.【Method】We studied pure F. mandshurica plantation, Larix olgensis ×F. mandshurica mixed plantation, Picea koraiensis ×F. mandshurica mixed plantation, and Pinus koraiensis ×F. mandshurica mixed plantation that were planted 29 years ago on the natural forest strip clear cutting land in the Forest Cultivation Experiment Station of Northeast Forestry University;leaf-litter-soil samples were also taken back to the laboratory for analysis. Organic C, N, P content in the leaf-litter-soil system was measured. C, N and P content, as well as their ratios in the leaf-litter-soil system of the four types of F. mandshurica plantations were compared.【Result】N and P content in F. mandshuricab and L. olgensis leaves were significantly higher when compared with those of Picea koraiensis and Pinus koraiensis. N and P content in the litter of F. mandshurica plantation were significantly higher when compared with those in the litter of the three kinds of mixed plantations. C, N and P content in the soil differed significantly among the different plantation types. C content was the highest in L. olgensis ×F. mandshurica mixed plantation. N and P contents were the highest in pure Fraxinus mandshurica plantation. C, N and P content were the lowest in Pinus koraiensis ×F. mandshurica mixed plantation. The average decrease in the ratio of C,
作者
郝玉琢
周磊
吴慧
王树力
HAO Yuzhuo;ZHOU Lei;WU Hui;WANG Shuli(College of Forestry,Northeast Forestry University,Harbin 150040,China)
出处
《南京林业大学学报（自然科学版）》
CAS
CSCD
北大核心
2019年第4期101-108,共8页
Journal of Nanjing Forestry University：Natural Sciences Edition
基金
国家重点研发计划(2017YFD0601103)
黑龙江省省级财政林业科研专项(201522)
关键词
水曲柳人工林
叶片
凋落物
土壤
生态化学计量特征
养分利用效率
Fraxinus mandshurica plantation
leaf
litter
soil
ecological stoichiometric characteristics
efficacy of nutrientuse
