[1]范如芹,罗佳,严少华,等.长期免耕及常规耕作对土壤胡敏酸含量及其结构的影响[J].江苏农业学报,2015,(01):80-86.[doi:10.3969/j.issn.1000-4440.2015.01.012]
　FAN Ru-qin,LUO Jia,YAN Shao-hua,et al.Content and structural features of humic acid in black soil affected by long-term no-tillage and conventional tillage[J].,2015,(01):80-86.[doi:10.3969/j.issn.1000-4440.2015.01.012]
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长期免耕及常规耕作对土壤胡敏酸含量及其结构的影响()
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江苏农业学报[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2015年01期
页码:
80-86
栏目:
土壤肥料·资源环境
出版日期:
2015-02-28

文章信息/Info

Title:
Content and structural features of humic acid in black soil affected by long-term no-tillage and conventional tillage
作者:
范如芹1; 罗佳1; 严少华1; 杨学明2; 张振华1
（1.江苏省农业科学院农业资源与环境研究所，江苏南京210014；2.加拿大农业与农业食品部温室与加工作物研究中心，安大略N0R 1G0）
Author(s):
FAN Ru-qin1; LUO Jia1; YAN Shao-hua1; YANG Xue-ming2; ZHANG Zhen-hua1
（1.Institute of Agricultural Resource and Environment， Jiangsu Academy of Agricultural Sciences， Nanjing 210014， China;2.Greenhouse & Processing Crops Research Centre， Agriculture and Agri-food Canada， Ontario， N0R 1G0， Canada）
关键词:
土壤有机碳; 稳定性; 耕作方式; 腐植酸; 芳香碳
Keywords:
Soil organic carbon; stability; tillage; humic acid; aromatic carbon
分类号:
S153.6
DOI:
10.3969/j.issn.1000-4440.2015.01.012
文献标志码:
A
摘要:
本研究以加拿大安大略省西南部长期田间定位试验黑土为研究对象，对进行了29年传统耕作（CT83）、29年免耕（NT83）、传统耕作14年后转为免耕（NT97）以及免耕14年后转为传统耕作（CT97）的土壤胡敏酸及其碳、氮含量进行了分析，并运用红外光谱和核磁共振技术对胡敏酸结构进行了研究。结果表明，随着耕作强度及年限的增加，土壤胡敏酸及其C含量也增加;免耕14年又改回传统耕作后胡敏酸及其碳、氮含量均显著提高，胡敏酸氧化度和芳香度开始增加;29年免耕土壤的胡敏酸与15年免耕土壤相比在烷基碳、羧基碳和乙缩醛基碳含量中表现出明显差异。说明，与免耕相比，传统耕作促进了土壤腐殖化程度的提高，使胡敏酸的结构趋于复杂。
Abstract:
To evaluate the effects of tillage history and changes of tillage practices on the content and structural features of humic acid (HA), a 29-year stationary field experiment was conducted in a black soil field in southwestern Ontario, Canada. The experiment was designed to have four tillage treatments with different tillage histories, i.e. a 29-year conventional tillage beginning from 1983 (CT83), a 29-year no-tillage beginning from 1983 (NT83), a 15-year no-tillage converted from a 14-year conventional tillage (NT97), a 15-year conventional tillage converted from a 14-year no-tillage (CT97). Soil samples were collected from 0-10 cm soil depth and the contents of HA, and the carbon (HA-C) and nitrogen (HA-N) in HA were determined. Structural features of HA were analyzed using Fourier-transform infrared spectroscopic （FTIS） and Solid-state 13C NMR spectroscopic methods. The results showed that the contents of HA and HA-C increased with the increase of tillage age and tillage intensity. When the 14-year no-tillage was converted into conventional tillage, the contents of HA, HA-C, HA-N, as well as the oxidizability and aromaticity of HA started to increase. The contents of O-alkyl-C, carboxyl-C, and acetal-C in HA differed significantly in the soils of NT83 and NT97. The aromaticity of HA in the soils of NT83, NT97, CT97 and CT83 were 32.1%, 36.0%, 46.1% and 46.8%, respectively. The contents of microbial decomposition products were 37.2%, 22.9%, 21.0 and 20.9% in soils of NT83, NT97, CT97 and CT83, respectively, indicating that microbial activity in soils under long-term no-tillage is more active than that under conventional tillage. Accordingly, soil disturbance intensity tended to accelerate the aging of soil HA. Compared to no-tillage, conventional tillage promoted the humification of the soil and the complication of HA structure.

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备注/Memo

备注/Memo:
收稿日期：2014-09-10 基金项目：国家自然科学基金项目（41401259）;中国博士后科学基金项目（2014M551528）;公益性行业（农业）科研专项项目（201203050）;江苏省农业科技自主创新基金项目[CX（14）2035] 作者简介：范如芹（1984-），女，山东沂南人，博士，助理研究员，主要研究方向为无土栽培基质的配方研究。（Tel）025-84390787；（E-mail）fanruqin2007@126.com。罗佳为共同第一作者。 通讯作者：张振华，（E-mail）zhenhuaz70@hotmail.com
更新日期/Last Update: 2015-02-28