碳氮磷化学计量比对土壤有机碳矿化激发效应的影响

张睿媛; 袁丹; 秦树平; 胡春胜

doi:10.12357/cjea.20230135

碳氮磷化学计量比对土壤有机碳矿化激发效应的影响

doi: 10.12357/cjea.20230135

张睿媛^{1, 2,},
袁丹^{1, 2},
秦树平¹,
胡春胜^{1, 2, ,}

1.
中国科学院遗传与发育生物学研究所农业资源研究中心/河北省土壤生态学重点实验室/中国科学院农业水资源重点实验室　石家庄　050022
2.
中国科学院大学　北京　100049

基金项目: 国家重点研发青年科学家项目(2021YFD1500400)资助

详细信息

作者简介:
张睿媛, 主要研究方向为土壤碳氮循环。E-mail: zhangruiyuan20@mails.ucas.ac.cn

通讯作者:
胡春胜, 主要研究方向为农田生态系统碳、氮、水循环及土壤生态过程。E-mail: cshu@sjziam.ac.cn

中图分类号: S154.1
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出版历程
- 收稿日期: 2023-03-13
- 录用日期: 2023-05-11
- 网络出版日期: 2023-05-19

Effects of carbon, nitrogen and phosphorus stoichiometry on the priming of soil carbon mineralization

ZHANG Ruiyuan^{1, 2
,},
YUAN Dan^{1, 2},
QIN Shuping¹,
HU Chunsheng^{1, 2
, ,}

1.
Center for Agricultural Resources Research, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences/Hebei Key Laboratory of Soil Ecology/Key Laboratory of Agricultural Water Resources, Chinese Academy of Sciences, Shijiazhuang 050022, China
2.
University of Chinese Academy of Sciences, Beijing 100049, China

Funds: This study was supported by the National Key Research and Development Young Scientist Program of China (2021YFD1500400)

More Information

Corresponding author: HU Chunsheng, E-mail: cshu@sjziam.ac.cn

摘要

摘要: 土壤有机碳矿化激发效应(priming effects)是指由外源有机物料添加所引起的短期内土壤有机质周转剧烈改变的现象, 是影响土壤生态系统碳动态的关键过程之一。尽管激发效应的诱发机制已广为人知, 但目前的大多数研究仅考虑了外源有机碳输入对其的影响。碳氮磷是土壤生态系统中的基本营养元素, 碳氮磷化学计量比通过影响微生物可获得的营养元素的均衡进而调控激发效应的方向与强度。本文总结了碳氮磷化学计量比调控土壤激发效应的相关研究进展, 分析了土壤碳周转相关微生物群落结构及活性对不同碳氮磷输入配比的响应机制, 总结出“共代谢” “微生物营养挖掘”和“化学计量分解” 3种有关碳氮磷化学计量比调控激发效应的机制。未来急需将碳氮磷化学计量比调控土壤激发效应的理论运用于农田固碳减排的生产实践, 服务于我国“碳达峰碳中和”双碳战略的实施。
- 激发效应 /
- 生态化学计量 /
- 土壤有机碳矿化
Abstract: Priming effects of soil organic carbon decomposition refer to the phenomenon of drastic changes in soil organic matter turnover in a short term caused by the addition of exogenous organic materials. Priming effects is one of the key processes affecting the carbon dynamics in soil ecosystem. Al though the mechanisms responsible for the occurrence and maintenance of priming effects are well-understood, most previous studies only considered the impact of input of exogenous available organic carbon on priming effects. Carbon, nitrogen and phosphorus are the basic nutrients in soil ecosystems, and their stoichiometry ratios regulate the direction and intensity of priming effects via affecting the balance of nutrients availability to microorganisms. In this paper, the research progress on the regulation of stoichiometric ratio of carbon, nitrogen and phosphorus on soil priming effects is summarized, the responses of microbial community structure and activity relevant to soil carbon turnover to different carbon, nitrogen and phosphorus input ratios is analyzed, and three mechanisms on the regulation of carbon, nitrogen and phosphorus stoichiometric ratio on priming effects are summarized, i. e., “co-metabolism”, “microbial nutrition mining” and “stoichiometric decomposition”. It is urgent to apply the theory on the regulation of stoichiometry ratio on soil priming effects for carbon sequestration and emission mitigation in farmland, which benefits China’s “carbon peak and carbon neutrality” dual carbon strategy.
- Priming effects /
- Ecological stoichiometry /
- Soil organic carbon mineralization

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图 1 微生物对土壤有机碳矿化激发效应(PE)的调控机制

Figure 1. Mechanisms of microbial regulation of priming effects (PE) on mineralization of soil organic carbon

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表 1 外源碳氮磷输入对土壤碳矿化激发效应的影响

Table 1. Effect of carbon, nitrogen and phosphorus input on the priming effects (PE) of soil carbon mineralization

外源添加 Addition	研究地点 Site	生态系统 Ecosystem	土壤有机碳 Soil organic C (mg∙g⁻¹)	土壤碳/ 氮磷比 Soil C∶N/C∶P	外源碳添加量 C added amount (mg∙g⁻¹)	外源添加碳 C addition type	外源养分添加量 Nutrient addition	培养时间 Incubation time (d)	激发效应方向¹⁾ PE direction¹⁾	激发效应方向²⁾ PE direction²⁾	激发效应变化³⁾ PE change³⁾	参考文献 Reference
CN	中国内蒙古 Inner Mongolia, China	草原 Grassland	16.9	10.3	0.04	葡萄糖 Glucose	0~64 g(N)∙m⁻²∙a⁻¹	203	+	+	−	[16]
	中国山东 Shandong, China	农田 Cropland	9.1	10.5	1.73	玉米秸秆 Maize residue	44.66 mg(N)∙kg⁻¹	250	+	+	−	[17]
	美国加州 California, USA	农田 Cropland	9.6	12.2	0.24	黑麦草 Ryegrass	24 mg(N)∙kg⁻¹	42	+	+	−	[18]
	美国加州 California, USA	草地 Grassland	19.4	7.5	1.60	黑麦草 Ryegrass	160 mg(N)∙kg⁻¹	42	+	+	−
	中国湖南 Hunan, China	森林 Forest	131.7	16.7	2.10	葡萄糖 Glucose	206.18 mg(N)∙kg⁻¹	20	+	+	−	[19]
	中国福建 Fujian, China	森林 Forest	773.0	15.9	1.69	凋落物 Litter	5400 mg(N)∙kg⁻¹	100	+	+	+	[20]
	澳大利亚 Australia	森林 Forest	27.9	14.7	2.50	葡萄糖 Glucose	0~160 mg(N)∙kg⁻¹	7	+	+	+	[21]
CP	中国甘肃 Gansu, China 澳大利亚 Australia	草地 Grassland 草地 Grassland	33.8 56.0	9.1 14.0	0.09 0.05	葡萄糖 Glucose 葡萄糖 Glucose	10 g(P)∙m⁻²∙a⁻¹ 5 mg(P)∙kg⁻¹	32 6	- +	+ +	+ +	[22] [23]
CP	中国福建 Fujian, China	森林 Forest	80.0	15.3	20	凋落物 Litter	30 mg(P)∙kg⁻¹	35	+	+	−	[24]
CNP	澳大利亚 Australia	农田 Cropland	11.9	13.1	20	小麦秸秆 Wheat residue	225 mg(N)∙kg⁻¹ 54 mg(P)∙kg⁻¹	126	+	+	−	[25]
CNP	中国陕西 Shanxi, China	农田 Cropland	11.3	12.7	1.45	小麦秸秆 Wheat residue	4.84 mg(N)∙kg⁻¹ 1.16 mg(P)∙kg⁻¹	84	+	+	+	[26]
	中国湖南 Hunan, China	农田 Cropland	13.1	9.4	2.50	水稻秸秆 Rice straw	90 mg(N)∙kg⁻¹ 30 mg(P)∙kg⁻¹	100	+	+	+	[27]
1)单独外源碳输入下的激发效应方向; 2)外源碳与养分共同输入下激发效应的方向; 3)外源碳、养分共同输入与单独外源碳输入相比激发效应的变化, “+”为促进, “−”为抑制。1) direction of priming effects under exogenous carbon input alone; 2) direction of priming effects under the joint input of exogenous carbon and nutrients; 3) changes in priming effects of exogenous carbon and nutrient co-input compared with exogenous carbon input alone. “+” for promotion and “−” for inhibition.

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