文献类型：期刊文献

中文题名：虫害对华山松人工林土壤酶活性及碳氮磷化学计量特征的影响

英文题名：Effects of Insect Disturbance on Characteristics of Soil Enzyme Activity and C∶N∶P Stoichiometry in Pinus armandii Forest

作者：黄金莲[1] 崔鸿侠[2] 唐万鹏[2] 胡琛[1] 马致远[1] 雷静品[1]

第一作者：黄金莲

机构：[1]中国林业科学研究院林业研究所,北京100091;[2]湖北省林业科学研究院,武汉430075

年份：2023

卷号：59

期号：10

起止页码：128-137

中文期刊名：林业科学

外文期刊名：Scientia Silvae Sinicae

收录：CSTPCD;;EI(收录号：20234715076828);Scopus;北大核心:【北大核心2020】；CSCD:【CSCD2023_2024】；

基金：湖北省林业科学研究院科技攻关项目(2021YGG05);神农架林区林业科技计划项目(SAF202108);神农架科技协同创新与攻关课题(2019SNJ001)。

语种：中文

中文关键词：虫害干扰;华山松;酶活性;化学计量特征;土壤呼吸

外文关键词：insect disturbance;Pinus armandii;soil enzyme activity;stoichiometric characteristics;soil respiration

分类号：S714

摘要：【目的】测定神农架林区受虫害干扰后华山松林生长季内的土壤酶活性、土壤化学性质和土壤呼吸速率,探究虫害干扰的影响,为受虫害华山松林的土壤碳排放管理提供理论依据。【方法】在受虫害华山松林(DPAF)和健康华山松林(HPAF)样地内,利用土壤呼吸环(样地内随机布设)测定土壤呼吸速率,并在附近取0~10 cm土样,测定土壤的化学性质和酶活性。【结果】受虫害华山松林土壤有机碳(SOC)、全氮(TN)、水解性氮(AN)、速效钾(AK)含量以及C/N、C/P、N/P低于健康华山松林,土壤全磷(TP)、全钾(TK)、有效磷(AP)含量高于健康华山松林。受虫害华山松林土壤过氧化氢酶(CAT)、蛋白酶(ACPT)、蔗糖酶(SC)活性显著高于健康华山松林(P<0.05),土壤磷酸酶(ACP)活性显著低于健康华山松林(P<0.05)。冗余分析(RDA)分析表明,N/P是影响土壤ACP活性的主导因子,TK是影响土壤ACPT和CAT活性的主导因子;TP、AP含量对土壤酶活性的影响达极显著水平(P<0.01),解释量分别为58.9%、50.5%;N/P、C/P对土壤酶活性的影响达显著水平(P<0.05),解释量分别为34.0%、26.5%。受虫害华山松林与健康华山松林的土壤呼吸速率(Rs)在生长季内变化趋势基本一致,均呈单峰曲线特征,在不同月份间存在极显著差异(P<0.01),夏季显著高于春、秋、冬季。受虫害华山松林在生长季内的Rs低于健康华山松林,且差异集中在夏季生长旺期。受虫害华山松林的Rs与各土壤化学因子无显著相关,健康华山松林的Rs与土壤pH显著负相关(P<0.05)。【结论】虫害干扰对华山松林土壤化学性质和酶活性有显著影响,其中虫害干扰对华山松林土壤酶活性的影响主要通过控制土壤磷元素(TP、AP)循环及其相关生态计量比(C/P、N/P)实现,受干扰林不存在土壤磷限制。受虫害干扰后,华山松林生长季内的土壤呼吸速率显著降低,与土壤酶活性和化学性质存在不显著相关。
【Objective】This study takes the disturbed Pinus armandii forest in the Shennongjia forest region as the research subject,and measures the enzyme activity and soil chemical properties of the P.armandii forest in the growing season and soil respiration after the insect disturbance,aims to explore the changes of soil enzyme activity and soil chemical properties of P.armandii forest and their effect on soil respiration which provides a theoretical basis for the soil carbon emission of P.armandii forest after insect disturbance.【Method】In two types of samples(disturbed P.armandii forest-DPAF,healthy P.armandii forest-HPAF),soil samples of 0-10 cm are selected near the soil respiration ring(randomly laid out in the sample)to determine the soil chemical properties and soil enzyme activity,respectively.【Result】The soil organic carbon(SOC),total nitrogen(TN),available nitrogen(AN),available potassium(AK)contents and C/N,C/P,N/P of the disturbed P.armandii forest are lower than the healthy P.armandii forest,but the soil total phosphorus(TP),total potassium(TK)and available phosphorus(AP)content are higher than that of the Healthy P.armandii forest.Soil catalase(CAT),acid protease(ACPT)and sucrase(SC)activities of healthy P.armandii forest are significantly higher than those of healthy P.armandii forest(P<0.05),and soil acid protease(ACP)activity is significantly lower than that of healthy P.armandii forest(P<0.05).N/P is the dominant factor affecting ACP activity,and TK is the dominant factor affecting ACPT and CAT activity.Redundant analysis shows that the effects of TP and AP on soil enzyme activities reach a highly significant level(P<0.01),with an interpretation amount of 58.9%and 50.5%,respectively.RDA analysis shows that the effects of N/P and C/P on soil enzyme activities reach a significant level(P<0.05),with an explanation amount of 34.0%and 26.5%,respectively.The soil respiration(Rs)of the disturbed P.armandii forest and the healthy P.armandii forest are basically the same as the growth season,and the monthly change of Rs in the growing season has the characteristics of a unipolar curve.Analysis of variance shows that Rs reaches a highly significant difference between different months(P<0.01).Rs also varies at different times of the growing season,with Rs significantly higher in summer than in Spring,Autumn and Winter,and significant differences in Summer Rs.The Rs of the disturbed P.armandii forest are lower than those of the healthy P.armandii forest during the growing season,and the concentration differences are in the summer growth period.There are no significant differences between the Rs and the chemical factors in the disturbed P.armandii forest,and the Rs of healthy P.armandii forest is significantly inversely correlated with pH.【Conclusion】After the disturbance of insect disturbance,the soil chemical properties and enzyme activities of P.armandii forest have significant variations.The effects of insect disturbance on soil enzyme activities in P.armandii forest are mainly achieved through the control of the soil phosphorus element(TP,AP)cycle and the regulation of related ecological measurement ratios(C/P,N/P),and there is no soil phosphorus element limitation.After the disturbance,the soil respiration rate of P.armandii plantation forest in the growing season is significantly reduced,and the difference is related to the soil enzyme activity and chemical properties,but there is no significant relationship.