您好，欢迎访问江西省农业科学院 机构知识库！

Long-term mineral fertilization in paddy soil alters the chemical structures and decreases the fungistatic activities of humic acids

文献类型： 外文期刊

作者： Wu, Meng 1 ; Wei, Shiping 1 ; Liu, Jia 1 ; Liu, Ming 1 ; Jiang, Chunyu 1 ; Li, Zhongpei 1 ;

作者机构： 1.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing, Peoples R China

2.Jiangxi Acad Agr Sci, Soil & Fertilizer Resources & Environm Inst, Nanchang, Jiangxi, Peoples R China

3.Chinese Acad Sci, Grad Univ, Coll Resources & Environm, Beijing, Peoples R China

关键词： 13C-NMR spectroscopy; ecological function; humic substance; humus structure; long-term experiment; phytopathogenic fungi; rice soil

期刊名称：EUROPEAN JOURNAL OF SOIL SCIENCE （ 影响因子：4.949； 五年影响因子：4.626 ）

ISSN： 1351-0754

年卷期： 2019 年 70 卷 4 期

页码：

收录情况： SCI

摘要： Fungistatic activity is a newly identified ecological function for soil humic acids. However, the relation between fungistatic activities of soil humic acids and their chemical structures is still unclear. In addition, how fertilizer application affects fungistatic activity is still unknown. We sampled paddy soils with different long-term fertilizer schemes, namely: unfertilized control (CK), mineral fertilizer applied (NPK) and mineral fertilizer applied plus straw return (NPKRS). Soil humic acids were extracted and their fungistatic activities against 14 phytopathogenic fungi were investigated to evaluate their ecological functions. The humic acids from NPK and NPKRS treatments showed much smaller fungistatic effects than those from CK treatments. The chemical structures of humic acids were investigated by C-13 nuclear magnetic resonance (C-13 NMR) spectroscopy. Long-term fertilization significantly changed the chemical structure of soil humic acid, and the variation in chemical structure affected the fungistatic activities. The relative content of alkoyl C and alkyl C, the alkoyl C/alkyl C ratio and aliphaticity all had positive correlations with the fungistatic effects of humic acids. That indicated humic acids with more aliphatic and decomposable structures showed more fungistatic activity. From the results, we believe that long-term application of mineral fertilizer in paddy fields makes the soil humic acids less aliphatic and more recalcitrant, and concomitantly weakens their ability to inhibit phytopathogenic fungi. Highlights We studied the inhibitory effects of paddy soil humic acids on 14 phytopathogenic fungi. Fertilization-induced changes in humic acids affect inhibition of phytopathogenic fungi. Long-term mineral fertilization significantly changed chemical structures of humic acids. Humic acid with more aliphatic and decomposable structures had more fungistatic activity.

  • 相关文献
作者其他论文 更多>>
置顶
购物车
反馈

© 京ICP备09089781号-29 主办单位：江西省农业科学院

学术资源： 中国农业科学院 农业专业知识服务系统 农科联盟资源共建共享平台 中国农业科技文献与信息服务平台 中国农业期刊集成服务平台