浙江农林大学学报2025，Vol.42Issue(6)：1232-1242,11.DOI:10.11833/j.issn.2095-0756.20250127
二氧化碳摩尔分数升高与氮添加对宁夏枸杞根区土壤理化性质和酶活性的影响
Effects of elevated CO2 concentration and nitrogen addition on soil physicochemical properties and enzyme activities in the root zone of Lycium barbarum
摘要
Abstract
[Objective]This aim was to investigate the changes of the key physicochemical properties and enzyme activities in the rhizosphere soil of Lycium barbarum under the interaction effects of elevated atmospheric CO2 concentration and nitrogen addition.[Method]The four-year old potted plants of L.barbarum'Ningqi 1'were used as experimental materials,with the open-top chamber(OTC)control system to simulate the treatment of elevated CO2 concentration[CO2,(840±20)μmol·mol-1],and at the same time,the CO2 concentration in the natural environment was used as the control[ck,(420±20)μmol·mol-1];The treatments included three levels of nitrogen addition were set:N0(0 g·kg-1),N1(1 g·kg-1),and N2(2 g·kg-1),and the total nitrogen,total phosphorus,organic matter content,and indicators of catalase and polyphenol oxidase were measured and analyzed in the soil of the rhizosphere zone of L.barbarum.[Result](1)The interaction between elevated CO2 concentration and nitrogen addition has an extremely significant impact on soil total potassium,ammonium nitrogen,available phosphorus,and available potassium throughout the entire treatment period(P＜0.01);(2)After 120 days of elevated CO2 concentration,soil polyphenol oxidase,acid invertase,and urease activities increased by 40.58%,30.67%,and 36.41%respectively compared to ambient CO2 concentration,while catalase activity decreased by 61.50%;(3)Significant correlations persisted between total potassium content and soil enzyme activities during the entire treatment duration.[Conclusion]Under the effects of elevated CO2 concentration and nitrogen addition,the contents of soil total phosphorus,organic matter,polyphenol oxidase,acid invertase,and urease in the root zone of L.barbarum exhibited an increasing trend,while the contents of soil total nitrogen and catalase showed a decreasing trend.The results of this study provide a reference and guidance basis for the adaptive cultivation and regulation of L.barbarum in Ningxia under the background of global climate change.[Ch,5 fig.1 tab.49 ref.].关键词
宁夏枸杞/CO2摩尔分数/氮添加/有机质/过氧化氢酶Key words
Lycium barbarum/CO2 concentration/nitrogen addition/organic matter/catalase分类
农业科技引用本文复制引用
ZHANG Lei,LI Jingzu,QI Chuanxin,MA Yaping,CAO Bing..二氧化碳摩尔分数升高与氮添加对宁夏枸杞根区土壤理化性质和酶活性的影响[J].浙江农林大学学报,2025,42(6):1232-1242,11.基金项目
国家自然科学基金资助项目(32160393) （32160393）
宁夏自然科学基金资助项目(2024AAC05038) （2024AAC05038）
