安徽农业科学2025，Vol.53Issue(7)：41-48,68,9.DOI:10.3969/j.issn.0517-6611.2025.07.009
宁南黄土区典型人工林土壤生态化学计量特征
Soil Ecological Stoichiometry Characteristics of Typical Plantation in Loess Region of Southern Ningxia
摘要
Abstract
[Objective]To explore the effects of different plantation on soil ecological stoichiometric characteristics,and reveal the distribution law of soil nutrients in typical artificial plantation ecosystems in the loess region of southern Ningxia.[Method]Six typical plantation forests(Prunus sibirica forest,Prunus davidiana forest,Caragana korshinskii forest,Hippophae rhamnoides forest,Prunus sibirica×Caragana korshin-skii,Prunus sibirica×Hippophae rhamnoides)of Pengyang Zhongzhuang small watershed in the loess region of southern Ningxia were selected as the research objects,and soil samples were collected from 0-20,>20-40,>40-60,>60-80,>80-100 cm,respectively.The contents of or-ganic carbon(SOC),total nitrogen(TN),total phosphorus(TP)and total potassium(TK)in different soil layers were determined and their stoichiometric ratios were analyzed.[Result]The soil nutrient content was influenced by the forest type and soil layer,and there were signifi-cant differences in soil nutrients among different forest stands,with"surface aggregation".SOC and TN showed a decreasing trend with in-creasing soil depth,while TP and TK showed weaker changes with soil depth.The nutrient content of Caragana korshinskii forest was the high-est among the six forest stands.The soil SOC content was at a"deficient"or"slightly deficient"level,and the soil TP content was at a"slightly deficient"level,indicating that SOC and P were limiting elements.The differences in soil C∶N,N∶P and N∶K among different for-est stands were not significant,while the C∶P ratio of Prunus armeniaca×Caragana korshinskii forest was significantly higher than that of other forest stands.The correlation between soil nutrient content and ecological stoichiometry in different forest stands was inconsistent.Soil C∶P and C∶K were greatly affected by soil SOC,C∶N,N∶P and N∶K were most affected by TN,and P∶K was most affected by TP.[Conclusion]The research results provide technological support for the restoration and sustainable management of plantation vegetation in the region.关键词
人工林/土壤养分/生态化学计量/变化特征/宁南黄土区Key words
Plantation/Soil nutrients/Ecological stoichiometry/Change characteristics/Loess region of southern Ningxia分类
农业科技引用本文复制引用
王月玲,许浩,安钰,韩新生,万海霞,董立国,米克进..宁南黄土区典型人工林土壤生态化学计量特征[J].安徽农业科学,2025,53(7):41-48,68,9.基金项目
宁夏农业高质量发展和生态保护科技创新示范课题资金项目(NGSB-2021-14-02) （NGSB-2021-14-02）
宁夏回族自治区自然科学基金项目(2022AAC03422). （2022AAC03422）
