南京林业大学学报（自然科学版）2024，Vol.48Issue(1)：140-146,7.DOI:10.12302/j.issn.1000-2006.202204011
C源与NP添加对Cd胁迫下林地土壤呼吸作用的影响
Effects of C,N and P additions on soil respiration in woodland under Cd stress
摘要
Abstract
[Objective]Artificial standard soil was used to investigate the potential stimulatory effects of low-dose C,N,and P additions on soil respiration and Hormesis under heavy metal stress.[Method]The four treatments were:GC(glucose),NP(nitrogen and phosphorus),GC+NP(glucose,nitrogen and phosphorus),and,no additions(CK).The soil samples were inoculated with soil microorganisms from forest land to determine the potential Hormesis effect of exogenous addition of glucose,N and P on soil respiration under Cd stress.[Result]In the case of the NP and GC+NP treatments,the soil respiration rate was significantly higher than that of the control at Cd doses of 0.02,0.10,0.40,2.50,and 13.00 mg/kg,respectively.There was a significant alternating phenomenon of multiple hormetic effects with stimulation amplitudes between 66.6%and 262.6%.When there was no Cd added to the soil,the sum of the soil respiration rates in the GC and NP treatments was greater than that in the GC+NP treatment.The interaction between C source and NP addition on soil respiration showed an antagonistic effect.When the Cd dose was 0.01 to 0.20 mg/kg,the sum of soil respiration rates in GC and NP treatments was lower than the corresponding rates in GC+NP treatments,and the effects of C source and NP additions on soil respiration showed a synergistic effect.Synergistic and antagonistic effects appeared alternately when the Cd dose was over 0.20 mg/kg.[Conclusion]The Cd-induced soil respiration rate had a significant Hormesis effect under exogenous NP addition.With increasing Cd stress,the interaction between the C source and NP addition on soil respiration changed from antagonistic to synergistic effects.关键词
土壤呼吸/Cd胁迫/毒物兴奋效应/模式土壤/葡萄糖/氮磷添加Key words
soil respiration/cadmium stress/hormesis/artificial standard soil/glucose/nitrogen and phosphorus addition分类
资源环境引用本文复制引用
孙劲伟,王圣燕,范弟武,朱咏莉..C源与NP添加对Cd胁迫下林地土壤呼吸作用的影响[J].南京林业大学学报（自然科学版）,2024,48(1):140-146,7.基金项目
国家自然科学基金项目(41977354) （41977354）
江苏高校优势学科建设工程资助项目(PAPD). （PAPD）
