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| 不同种植模式下微生物养分限制调节土壤有机碳积累 |
| Characteristics of microbial nutrient limitation regulate soil organic carbon sequestration in different cropplanting patterns |
| Received:January 29, 2024 |
| DOI：10.13254/j.jare.2024.0068 |
| 中文关键词: 种植模式，土壤养分，土壤酶活性，微生物养分限制，土壤有机碳 |
| 英文关键词: crop-planting pattern, soil nutrient, soil enzyme activity, microbial nutrient limitation, soil organic carbon |
| 基金项目:浙江省“尖兵”“领雁”研发攻关计划项目（2023C02005）；宁波市重大科技任务攻关项目（2022Z168） |
| Author Name | Affiliation | E-mail | | TANG Mingcan | College of Environment and Resources, Zhejiang A&F University, Hangzhou 311300, China
Institute of Plant Virology, Ningbo University, Ningbo 315211, China | | | WANG Xiangxiang | Institute of Plant Virology, Ningbo University, Ningbo 315211, China | | | MIAO Yi | Institute of Plant Virology, Ningbo University, Ningbo 315211, China | | | MA Zhi | Institute of Plant Virology, Ningbo University, Ningbo 315211, China | | | WANG Xianting | Agricultural Technical Extension of Yinzhou Station, Ningbo 315700, China | xtw1124@hotmail.com | | LI Guanjun | Institute of Plant Virology, Ningbo University, Ningbo 315211, China
School of Ecology and Nature Conservation, Beijing Forestry University, Beijing 100083, China | | | GE Tida | Institute of Plant Virology, Ningbo University, Ningbo 315211, China | | | ZHU Zhenke | Institute of Plant Virology, Ningbo University, Ningbo 315211, China | | | CHEN Junhui | College of Environment and Resources, Zhejiang A&F University, Hangzhou 311300, China | junhui@zafu.edu.cn |
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| 中文摘要: |
| 为探究不同种植模式对土壤微生物养分限制状况以及土壤有机碳积累的影响，进而优化农田管理模式，本研究在县域尺度不同种植模式农田采集了单作水稻、单作小麦、单作菜地（白菜）、麦-菜轮作（小麦→白菜一年一作）、稻-菜轮作（水稻→白菜一年一作）共76个土壤样品，研究不同种植模式下土壤酶化学计量特征及土壤C∶N∶P化学计量比值。结果表明，单作水稻和稻-菜轮作下土壤有机碳（SOC）和微生物生物量碳（MBC）含量最高，SOC是其他种植模式的1.3~1.6倍，MBC是其他种植模式的1.6~2.0倍，单作水稻土壤中可溶性有机碳（DOC）含量最高（100 mg·kg-1）。此外，水解酶活性在单作水稻和稻-菜轮作模式下均高于其他种植模式，稻-菜轮作模式下微生物碳限制和磷限制最低，而单作水稻模式下土壤微生物碳限制低于其他模式，但微生物磷限制高于其他种植模式。研究表明，单作水稻和稻-菜轮作模式可以显著降低微生物养分限制，进而促进农田土壤碳的固持，为通过改变作物种植模式实现农业可持续发展提供了理论支撑。 |
| 英文摘要: |
| To investigate the characteristics of soil microbial nutrient limitation and organic carbon sequestration under different cropplanting patterns, an extensive field sampling survey was conducted. A total of 76 sample plots of paddy, wheat, vegetable field（cabbage）, wheat-vegetable rotation（wheat→cabbage in one year）, and paddy-vegetable rotation（paddy→cabbage in one year）were investigated to study the characteristics of soil enzyme stoichiometry and the ratios of soil nutrients under different crop-planting patterns. Soil organic carbon（SOC）and microbial biomass carbon（MBC）were the highest under paddy and paddy-vegetable rotation. The SOC and MBC were 1.3–1.6 times and 1.6–2.0 times higher than other crop-planting modes, respectively. The dissoluble organic carbon（DOC）content was the highest in paddy soil（100 mg·kg-1）. In addition, microbial hydrolase activities were higher in both paddy and paddy-vegetable rotation modes than in other cropping modes; while microbial carbon and phosphorus limitation were lowest in paddy-vegetable rotation. In contrast, microbial carbon limitation in paddy soil was lower than in other modes, but microbial phosphorus limitation was higher than in other cropping modes. The study shows that paddy and paddy-vegetable rotation patterns promote soil carbon sequestration in farmland by decreasing microbial nutrient limitation, which provides theoretical support for the realization of sustainable development of agriculture by changing crop-planting patterns. |
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