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论文题目: Long-term fertilization and residue return affect soil stoichiometry characteristics and labile soil organic matter fractions
英文论文题目: Long-term fertilization and residue return affect soil stoichiometry characteristics and labile soil organic matter fractions
第一作者: 罗莎莎
英文第一作者: Luo, SS
联系作者: 田春杰
英文联系作者: Tian, CJ
发表年度: 2020
卷: 30
期: 5
页码: 703-713
摘要:

Ecological stoichiometry provides the possibility for linking microbial dynamics with soil carbon (C), nitrogen (N), and phosphorus (P) metabolisms in response to agricultural nutrient management. To determine the roles of fertilization and residue return with respect to ecological stoichiometry, we collected soil samples from a 30-year field experiment on residue return (maize straw) at rates of 0, 2.5, and 5.0 Mg ha(-1) in combination with 8 fertilization treatments: no fertilizer (F0), N fertilizer, P fertilizer, potassium (K) fertilizer, N and P (NP) fertilizers, N and K (NK) fertilizers, P and K (PK) fertilizers, and N, P, and K (NPK) fertilizers. We measured soil organic C (SOC), total N and P, microbial biomass C, N, and P, water-soluble organic C and N, KMnO4-oxidizable C (KMnO4-C), and carbon management index (CMI). Compared with the control (FO treatment without residue return), fertilization and residue return significantly increased the KMnO4 -C content and CMI. Furthermore, compared with the control, residue return significantly increased the SOC content. Moreover, the NPK treatment with residue return at 5.0 Mg ha(-1) significantly enhanced the C:N, C:P, and N:P ratios in the soil, whereas it significantly decreased the C:N and C:P ratios in soil microbial biomass. Therefore, NPK fertilizer application combined with residue return at 5.0 Mg ha(-1) could enhance the SOC content through the stoichiometric plasticity of microorganisms. Residue return and fertilization increased the soil C pools by directly modifying the microbial stoichiometry of the biomass that was C limited.

英文摘要:

Ecological stoichiometry provides the possibility for linking microbial dynamics with soil carbon (C), nitrogen (N), and phosphorus (P) metabolisms in response to agricultural nutrient management. To determine the roles of fertilization and residue return with respect to ecological stoichiometry, we collected soil samples from a 30-year field experiment on residue return (maize straw) at rates of 0, 2.5, and 5.0 Mg ha(-1) in combination with 8 fertilization treatments: no fertilizer (F0), N fertilizer, P fertilizer, potassium (K) fertilizer, N and P (NP) fertilizers, N and K (NK) fertilizers, P and K (PK) fertilizers, and N, P, and K (NPK) fertilizers. We measured soil organic C (SOC), total N and P, microbial biomass C, N, and P, water-soluble organic C and N, KMnO4-oxidizable C (KMnO4-C), and carbon management index (CMI). Compared with the control (FO treatment without residue return), fertilization and residue return significantly increased the KMnO4 -C content and CMI. Furthermore, compared with the control, residue return significantly increased the SOC content. Moreover, the NPK treatment with residue return at 5.0 Mg ha(-1) significantly enhanced the C:N, C:P, and N:P ratios in the soil, whereas it significantly decreased the C:N and C:P ratios in soil microbial biomass. Therefore, NPK fertilizer application combined with residue return at 5.0 Mg ha(-1) could enhance the SOC content through the stoichiometric plasticity of microorganisms. Residue return and fertilization increased the soil C pools by directly modifying the microbial stoichiometry of the biomass that was C limited.

刊物名称: PEDOSPHERE
英文刊物名称: PEDOSPHERE
参与作者: Gao, Qiang;Wang, Shaojie;Tian, Lei;Zhou, Qi;Li, Xiujun;
英文参与作者: Gao, Qiang;Wang, Shaojie;Tian, Lei;Zhou, Qi;Li, Xiujun;
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