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应用生态学报 ›› 2019, Vol. 30 ›› Issue (1): 189-197.doi: 10.13287/j.1001-9332.201901.033

• 研究论文 • 上一篇    下一篇

不同施肥处理下水稻根际和非根际土壤中氨基糖积累特征

宁赵1,2,陈香碧2,唐海明3,葛体达2,何红波4,胡建良5,苏以荣2,邓扬悟1*   

  1. 1江西理工大学资源与环境工程学院, 江西赣州 341000;
    2中国科学院亚热带农业生态研究所亚热带农业生态过程重点实验室, 长沙 410125;
    3湖南省土壤肥料研究所, 长沙 410125;
    4中国科学院沈阳应用生态研究所, 沈阳 110016;
    5湖南省宁乡市菁华铺乡农业服务中心, 湖南宁乡 410600
  • 收稿日期:2018-05-24 修回日期:2018-11-26 出版日期:2019-01-20 发布日期:2019-01-20
  • 通讯作者: tosang@foxmail.com
  • 作者简介:宁 赵, 男, 1995年生, 硕士研究生. 主要从事土壤微生物生态研究. E-mail: 1009421105@qq.com
  • 基金资助:
    本文由国家重点研发计划项目(2016YFD0200106)、国家自然科学基金项目(41671298,41430860)、中国科学院亚热带农业生态研究所青年创新团队项目(2017QNCXTD_GTD)和中国科学院亚热带农业生态研究所开放基金项目(ISA2017302)资助

Characteristics of amino sugar accumulation in rhizosphere and non rhizosphere soil of rice under different fertilization treatments

NING Zhao1,2, CHEN Xiang-bi2, TANG Hai-ming3, GE Ti-da2, HE Hong-bo4, HU Jian-liang5, SU Yi-rong2, DENG Yang-wu1*   

  1. 1School of Resource and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi, China;
    2Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China;
    3Hunan Soil and Fertilizer Institute, Changsha 410125, China;
    4Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China;
    5Agricultural Service Center in Jinghua Town, Ningxiang 410600, Hunan, China
  • Received:2018-05-24 Revised:2018-11-26 Online:2019-01-20 Published:2019-01-20
  • Supported by:
    This work was supported by the National Key Research Program (2016YFD0200106), the National Natural Science Foundation of China (41671298, 41430860), the Youth Innovation Team Project of Institute of Subtropical Agriculture, Chinese Academy of Sciences (2017QNCXTD_GTD), and the Open Fundation Project of Institute of Subtropical Agriculture, Chinese Academy of Sciences (ISA2017302).

摘要: 以水稻长期定位施肥试验土壤为研究对象,选取不施肥(CK)、化肥(NPK)、秸秆还田+化肥(NPKS)、30%有机肥+70%化肥(LOM)和60%有机肥+40%化肥(HOM)5种处理,分析水稻分蘖旺期根际土和非根际土中氨基糖积累特征.结果表明: 与CK和NPK处理相比,长期施用有机物料(NPKS、LOM、HOM)显著增加了水稻根际土和非根际土中有机碳、总氨基糖及其氨基单糖(胞壁酸、氨基葡萄糖和氨基半乳糖)含量.不同施肥处理下3种氨基单糖的积累规律不同,说明不同微生物对施肥处理的响应趋势和强度有所不同.受稻田翻耕等均匀化土壤的农事操作影响,各处理总氨基糖含量在根际土与非根际土间无显著差异.氨基糖碳对土壤有机碳积累的贡献范围为24.0~28.3 mg·g-1,且以NPKS处理最高,HOM和CK处理最低.真菌氨基葡萄糖/胞壁酸比值范围为24.4~36.6,说明该试验点所有处理的根际土与非根际土中有机质的降解与转化过程以真菌为主导,且与NPK和CK相比,NPKS处理的真菌参与度提高,而施用HOM处理的细菌参与度提高.

Abstract: Soil samples were collected from paddy ecosystem under five long-term fertilization treatments, including control without fertilizer (CK), chemical fertilization alone (NPK), rice residue combined with NPK (NPKS), 30% manure plus 70% chemical fertilizer (LOM), and 60% manure plus 40% chemical fertilizer (HOM) in Ningxiang City, Hunan Province. The cha-racteristics of amino sugars accumulation in the rhizosphere and non-rhizosphere soils at rice tillering stage were analyzed. Results showed that the contents of soil organic carbon, total amino sugars and three amino monosaccharides (muramic acid, glucosamine and galactosamine) with long-term application of organic materials (rice residue or manure) were significantly higher compared with CK and NPK. The inconsistent accumulation trends of the three amino monosaccharides under different fertilization treatments indicated that different responses of microbial groups to various fertilization treatments. The content of total amino sugars was not significantly different between the rhizosphere soil and the non-rhizosphere soil, probably because the agricultural operations such as plowing could homogenize paddy soils. The contribution of amino sugar derived carbon to soil organic carbon ranged from 24.0 to 28.3 mg·g-1, which was highest in NPKS, and lowest in HOM and CK. The ratio of fungal to bacterial residues (fungal glucosamine/muramic acid) ranged from 24.4 to 36.6, indicating that fungi dominated the degradation and transformation of organic matter in all the soils. Compared with that under NPK and CK, the participation of organic matter transformation from fungi under NPKS treatment was increased, whereas the bacteria involved in organic matter transformation under HOM treatment was enhanced.