智慧农业导刊2026，Vol.6Issue(14)：35-42,8.DOI:10.20028/j.zhnydk.2026.14.009
间伐强度对白龙江流域云杉人工林土壤化学计量学特征的影响
摘要
Abstract
This study investigates the response patterns of soil stoichiometric characteristics to thinning intensities in a Picea asperata plantation on the eastern Tibetan Plateau,aiming to provide a scientific basis for its rational thinning.In Diebu County,Gansu Province,an overly dense spruce plantation(canopy closure of 0.9)was selected to establish a control plot with no thinning(CK)and three thinning treatments:T1(10%thinning),T2(15%thinning),and T3(20%thinning),to investigate soil nutrient characteristics and the main influencing factors under different thinning intensities.Compared with the control treatment,all three thinning intensities increased the soil water content(SWC),total nitrogen(TN),total phosphorus(TP)contents,and acid phosphatase(ACP)activity in the 0~60 cm soil layer,while decreasing soil pH and urease(URE)activity.Except for the T1 treatment,which increased ammonium nitrogen(NH4+-N)content by 8.87%,all other treatments reduced both NH4+-N and nitrate nitrogen(NO3--N)contents,with no significant effect observed under the T2 treatment.With increasing thinning intensity,SWC and the contents of NH4+-N,TN,and TP in the 0~60 cm soil layer showed a trend of initially increasing and then decreasing,whereas soil pH,NO3--N content,soil organic carbon(SOC)content,and URE activity exhibited a trend of initially decreasing and then increasing.Furthermore,the C:N ratio was significantly positively correlated with SOC,pH,and URE(P<0.05),and significantly negatively correlated with TN and SWC;the C:P ratio was significantly positively correlated with SOC,pH,and URE,and negatively correlated with TP;the N:P ratio was significantly positively correlated with TN and ACP.Significant differences in soil stoichiometric characteristics were observed among different thinning intensities.Under light thinning(10%thinning intensity),the soil C:N ratio was the lowest and the N:P ratio the highest,significantly increasing soil total nitrogen(TN)and ammonium nitrogen(NH4+-N)contents(P<0.05),thereby alleviating soil nitrogen limitation;meanwhile,nitrate nitrogen(NO3--N)content decreased,preventing potential leaching losses and associated environmental risks caused by excessive nitrate accumulation.关键词
间伐/白龙江/云杉林/土壤/化学计量学特征Key words
thinning/Bailong River/Picea asperata plantation/soil/stoichiometric characteristics分类
农业科技引用本文复制引用
何佳英,李广,刘锦乾,王飞,彭晋,吴江琪..间伐强度对白龙江流域云杉人工林土壤化学计量学特征的影响[J].智慧农业导刊,2026,6(14):35-42,8.基金项目
国家自然科学基金青年基金项目(42307348) （42307348）
甘肃省科技计划重大专项(26ZDFG001) （26ZDFG001）
甘肃省财政厅2023年第一批森林植被恢复项目(甘财资环[2023]75号) （甘财资环[2023]75号）
甘肃农业大学伏羲青年人才项目(Gaufx-05Y05) （Gaufx-05Y05）
