Ma Zhiqiang1; Zhang Xinyu1; Zhang Chuang2; Wang Huimin1; Chen Fusheng3; Fu Xiaoli1; Fang Xiangmin3; Sun Xiaomin1; Lei Qiuliang4
Source Publicationjournalofforestryresearch
AbstractNitrogen (N) and phosphorus (P) additions can affect soil microbial carbon (C) accumulation. However, the mechanisms that drive the changes in residual microbial C that occur after N and P additions have not been well-defined for Chinese fir plantations in subtropical China. We set up six different treatments, viz. a control (CK), two N treatments (NI: 50kgha-1 a-1; N2: 100 kg ha-1 a-1), one P treatment (P: 50 kg ha-1 a-1), and two combined N and P treatments (NIP: 50kgha-1a-1 of N +50kgha-1a-1 of P; N2P:100 kg ha-1 a-1 of N + 50 kg ha-1 a-1 of P). We then investigated the influences of N and P additions on residual microbial C. The results showed that soil pH and microbial biomass decreased after N additions, while microbial biomass increased after P additions. Soil organic carbon (SOC) and residual microbial C contents increased in the N and P treatments but not in the control. Residual microbial C accumulation varied according to treatment and declined in the order: N2P 〉 N1P 〉 N2 〉 N1 〉 P 〉 CK. Residual microbial C contents were positively correlated with available N, P, and SOC contents, but were negatively correlated with soil pH. The ratio of residual fungal C to residual bacterial C increased under P additions, but declined under combined N1P additions. The ratio of residual microbial C to SOC increased from 11 to 14% under the N1P and N2P treatments, respectively. Our results suggest that the concentrations of residual microbial C and the stability of SOC would increase under combined applications of N and P fertilizers in subtropical Chinese fir plantation soils.
Document Type期刊论文
4.Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences
First Author Affilication中国科学院地理科学与资源研究所
Recommended Citation
GB/T 7714
Ma Zhiqiang,Zhang Xinyu,Zhang Chuang,et al. accumulationofresidualsoilmicrobialcarboninchinesefirplantationsoilsafternitrogenandphosphorusadditions[J]. journalofforestryresearch,2018,029(004):953.
APA Ma Zhiqiang.,Zhang Xinyu.,Zhang Chuang.,Wang Huimin.,Chen Fusheng.,...&Lei Qiuliang.(2018).accumulationofresidualsoilmicrobialcarboninchinesefirplantationsoilsafternitrogenandphosphorusadditions.journalofforestryresearch,029(004),953.
MLA Ma Zhiqiang,et al."accumulationofresidualsoilmicrobialcarboninchinesefirplantationsoilsafternitrogenandphosphorusadditions".journalofforestryresearch 029.004(2018):953.
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