| 杨静,林祎,杨文浩,周碧青,毛艳玲,邢世和.不同施肥水稻土可溶性有机氮变化速率及对细菌的响应[J].农业环境科学学报,2021,40(7):1509-1518. |
| 不同施肥水稻土可溶性有机氮变化速率及对细菌的响应 |
| Soluble organic nitrogen variation rate and its response to bacteria under different fertilization treatments in paddy soil |
| 投稿时间：2020-12-27 |
| DOI：10.11654/jaes.2020-1446 |
| 中文关键词: 紫云英 水稻土 可溶性有机氮 变化速率 细菌群落 |
| 英文关键词: Chinese milk vetch paddy soil soluble organic nitrogen variation rate bacterial community |
| 基金项目:国家自然科学基金面上项目（41671490）；福建农林大学科技创新项目（KF2105074） |
| 作者 | 单位 | E-mail | | 杨静 | 福建农林大学资源与环境学院, 福州 350002 | | | 林祎 | 福建农林大学资源与环境学院, 福州 350002 | | | 杨文浩 | 福建农林大学资源与环境学院, 福州 350002
土壤生态系统健康与调控福建省高校重点实验室, 福州 350002 | | | 周碧青 | 福建农林大学资源与环境学院, 福州 350002
土壤生态系统健康与调控福建省高校重点实验室, 福州 350002 | | | 毛艳玲 | 福建农林大学资源与环境学院, 福州 350002
土壤生态系统健康与调控福建省高校重点实验室, 福州 350002 | | | 邢世和 | 福建农林大学资源与环境学院, 福州 350002
土壤生态系统健康与调控福建省高校重点实验室, 福州 350002 | fafuxsh@126.com |
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| 中文摘要: |
| 为揭示土壤可溶性有机氮（SON）变化速率（VSON）对细菌的响应，以水稻土为研究对象，研究了单施化肥（CK）、化肥配施紫云英（CMV1）和单施紫云英（CMV2）处理水稻生育期内耕层土壤SON含量及其变化速率，并探讨了VSON对细菌数量及群落结构的响应。结果表明：水稻生育期内CMV1和CMV2处理耕层土壤SON含量较CK处理分别高16.90%和20.20%，VSON则分别低22.26%和33.37%；水稻生育前期（0~24 d）耕层土壤SON下降幅度较大，且以移栽期VSON数值最大（1.02~2.02 mg·kg-1·d-1）。水稻生育期耕层土壤VSON与细菌群落多样性和丰富度密切相关，且对放线菌门微球菌科和变形菌门草酸杆菌科的响应最为敏感；水稻移栽期土壤VSON对微球菌科和草酸杆菌科的响应较为敏感，水稻分蘖期土壤VSON对草酸杆菌科、绿弯菌门和Solibacteraceae Subgroup_3科的响应较为敏感，而水稻成熟期土壤VSON则对放线菌门的响应更为敏感。研究表明，紫云英翻压可显著提高耕层土壤SON含量，降低水稻生育期内耕层土壤VSON，耕层土壤VSON与施肥和生育期密切相关，且其对细菌的响应有所不同。 |
| 英文摘要: |
| Soil soluble organic nitrogen（SON）, an important component of the soil active nitrogen pool, plays an important role in plant and microbial uptake and utilization, mineralization, and leaching and loss of nitrogen due to its strong solubility and mobility. However, the response of the soil SON variation rate（VSON）to bacteria remains unclear. In this study, taking subtropical paddy soil as the research object, three treatments were designed： chemical fertilizer（CK）, fertilizer with Chinese milk vetch（CMV1）, and Chinese milk vetch（CMV2）. The dynamics and variation rate of soil SON during the growth period of rice were studied, and the response of VSON to microorganisms was explored. The results showed that the soil SON content under the different fertilization treatments showed a change trend of rapid decrease, then slow fluctuating decrease, and finally steadiness during the growing period of rice. The soil SON content in treatments CMV1 and CMV2 were 16.90% and 20.20% higher than the content in CK, and VSON was 22.26% and 33.37% lower than that in CK, respectively, during the growing period. The soil SON decreased greatly during the early growth period of rice（0~24 d）, and the maximum VSON value was found in the transplanting period（1.02~2.02 mg·kg-1·d-1）. During the growth period of rice, soil VSON was significantly related to the diversity and richness of the bacterial community, but it was not closely related to the bacterial biomass. Redundancy analysis showed that soil VSON was positively correlated with family micrococcaceae of phylum Actinobacteria and negatively related with family Oxalobacteriaceae of phylum Proteobacteria. Different soil microorganisms in different growth stages of rice led to differences in VSON. The soil VSON was more sensitive to the responses of Micrococcaceae and Oxalobacteriaceae in the rice transplanting stage. It was more sensitive to the responses of the phylum Chloroflexi and Oxalobacteriaceae and Solibacteraceae Subgroup_3 in the tillering stage. Soil VSON was more sensitive to phylum Actinobacteria during the rice maturity stage. Therefore, application of Chinese milk vetch can significantly increase soil SON content and reduce soil VSON during the growth period of rice. Soil VSON is closely related to fertilization and growth period, and its responses to bacteria varied. |
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