水曲柳人工纯林与混交林土壤生态化学计量特征的比较

摘要

Taking 29-a pure Fraxinus mandshu ricaplantation, F.mandshurica-L.ol gensis mixed plantation, F.mandshurica-Picea koraien is mixed plantation and F.ma ndshurica-Pinus koraiens is mixed plantation which were planted on the natural forest narrow strip clear cutting land in the Forest Cultivation Experiment Station of Northeast Forestry University as materi-als,soilw(C),soil w(N),soil w(P),soil w(K)and their ecological stoichiometric characteristics were compared.The results show that w(C),w(N),w(P),and w(K)of pure F.mandshurica plantation were higher than that of F.mand-shurica-Picea koraiensis mixed plantation and F.m andshurica-Pinus koraiensis mixed plantation.Soil w(C)and w(P)of pure F.mandshurica plantation were lower than that of F.mandshurica-L.olgensis mixed plantation.There was not differ-ence between soil w(N)of pure F.mandshurica plantation and that of F.mandshurica-L.olgensis mixed plantation.Soil w (K)of pure F.mandshurica plantation was higher than that of F.mandshurica-L.olgensis mixed plantation.Soil w(C):w(N)of pure F.mandshurica plantation was lower than that of F.mandshuri ca-Picea koraiensis mixed plantation and F. mandshurica-Pinus koraiensis mixed plantation.Soil w(C):w(P)of pureF.mandshurica plantation was lower than that of three types of mixed plantation.Soil w(C):w(K),w(N):w(K)and w(P):w(K)of pure F.mandshurica planta-tion were higher than that of F.mandshurica-Picea koraiensis mixed plantation and F.mandshurica-Pinus koraiensis mixed plantation,and lower than that of F.mandshurica-L.olgensis mixed plantation.Soil w(N):w(P)of pure F.mandshurica plantation were higher than that of F.mandshurica-Pi nus koraiensis mixed plantation.There was significant relationships among soil w(C),w(N),and w(P).Soil w(C),w(N)and w(P)were the principal factor which affects soil w(C):w(N),w (C):w(P),w(C):w(K),w(N):w(P),w(N):w(K)and w(P):w(K).%以东北林业大学森林培育实验站营造的29年生水曲柳纯林、水曲柳-落叶松混交林、水曲柳-云杉混交林和水曲柳-红松混交林土壤为研究对象,对其土壤中的C、N、P、K质量分数及其生态化学计量特征进行了比较研究.结果表明:水曲柳纯林的土壤C、N、P、K质量分数皆高于水曲柳-云杉混交林和水曲柳-红松混交林,土壤C、P质量分数皆低于水曲柳-落叶松混交林,土壤N质量分数与水曲柳-落叶松混交林差异不明显,土壤K质量分数高于水曲柳-落叶松混交林;水曲柳纯林的土壤w(C):w(N)低于水曲柳-云杉混交林和水曲柳-红松混交林,w(C):w(P)低于3种混交林,w(C):w(K)、w(N):w(K)和w(P):w(K)皆高于水曲柳-云杉混交林与水曲柳-红松混交林,低于水曲柳-落叶松混交林,w(N):w(P)高于水曲柳-红松混交林;研究区土壤C、N、P质量分数间耦合关系显著;土壤C、N、P质量分数是影响土壤w(C):w(N)、w(C):w(P)、w(C):w(K)、w(N):w(P)、w(N):w(K)和w(P):w(K)的重要因素.