Carbon Sequestration in Soil Humic Substances Under Long-Term Fertilization in a Wheat-Maize System from North China

doi:10.1016/S2095-3119(13)60713-3

Journal of Integrative Agriculture ›› 2014, Vol. 13 ›› Issue (3): 562-569.DOI: 10.1016/S2095-3119(13)60713-3

Carbon Sequestration in Soil Humic Substances Under Long-Term Fertilization in a Wheat-Maize System from North China

SONG Xiang-yun, LIU Shu-tang, LIU Qing-hua, ZHANG Wen-ju , HU Chun-guang

1、College of Resources and Environment, Qingdao Agricultural University, Qingdao 266109, P.R.China
2、Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R.China

收稿日期:2013-10-09 出版日期:2014-03-01 发布日期:2014-03-12
通讯作者: LIU Shu-tang, Tel/Fax: +86-532-88030461, E-mail: liushutang212@163.com
作者简介:SONG Xiang-yun, Mobile: 15192771501, E-mail: songxiangyun5cl18@yahoo.com
基金资助:
This work was supported by the National Natural Science Foundation of China (30873470), the National Special Research Fund for Non-Profit Sector (Agriculture) (201203030), the grant from Qingdao Agricultural University, China (631214) and the Taishan ScholarsProgram of Shandong Province, China (Rainfed Crops and Breeding) for the supporting too.

Carbon Sequestration in Soil Humic Substances Under Long-Term Fertilization in a Wheat-Maize System from North China

SONG Xiang-yun, LIU Shu-tang, LIU Qing-hua, ZHANG Wen-ju , HU Chun-guang

1、College of Resources and Environment, Qingdao Agricultural University, Qingdao 266109, P.R.China
2、Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R.China

Received:2013-10-09 Online:2014-03-01 Published:2014-03-12
Contact: LIU Shu-tang, Tel/Fax: +86-532-88030461, E-mail: liushutang212@163.com
About author:SONG Xiang-yun, Mobile: 15192771501, E-mail: songxiangyun5cl18@yahoo.com
Supported by:
This work was supported by the National Natural Science Foundation of China (30873470), the National Special Research Fund for Non-Profit Sector (Agriculture) (201203030), the grant from Qingdao Agricultural University, China (631214) and the Taishan ScholarsProgram of Shandong Province, China (Rainfed Crops and Breeding) for the supporting too.

摘要/Abstract

摘要： The changes in humic substances (HS) is fundamental in detecting soil carbon sequestration mechanisms in natural and cultivated environments. Based on a long-term trial, the amounts of water dissolved substances (WSS), humic acid (HA), fulvic acid (FA) and humin (HU) were determined to explore the impact of long-term fertilization on HS. Increases in the amounts of WSS, HA, FA and HU were significant different among the treatments with manure. A significant correlation was found between the increased soil organic carbon (SOC) and HS (R2=0.98, P<0.01). The change in the E4/E6 ratio was significantly correlated with the increased SOC (R2=0.88, P<0.01), HA (R2=0.91, P<0.01), FA (R2=0.91, P<0.01) and HU (R2=0.88, P<0.01). The cluster was mainly divided into two parts as manure fertilization and inorganic fertilization, based on the increases in HA, FA and HU. These results suggest that long term fertilization with manure favours carbon sequestration in HS and is mainly stabilized as HU, while the HA becomes more aliphatic. We conclude that increases in SOC can be linked to changes in the molecular characteristics of HS fractions under long term fertilization.

关键词: carbon sequestration , humic acid , humin , long term fertilization , E4/E6 ratio

Abstract: The changes in humic substances (HS) is fundamental in detecting soil carbon sequestration mechanisms in natural and cultivated environments. Based on a long-term trial, the amounts of water dissolved substances (WSS), humic acid (HA), fulvic acid (FA) and humin (HU) were determined to explore the impact of long-term fertilization on HS. Increases in the amounts of WSS, HA, FA and HU were significant different among the treatments with manure. A significant correlation was found between the increased soil organic carbon (SOC) and HS (R2=0.98, P<0.01). The change in the E4/E6 ratio was significantly correlated with the increased SOC (R2=0.88, P<0.01), HA (R2=0.91, P<0.01), FA (R2=0.91, P<0.01) and HU (R2=0.88, P<0.01). The cluster was mainly divided into two parts as manure fertilization and inorganic fertilization, based on the increases in HA, FA and HU. These results suggest that long term fertilization with manure favours carbon sequestration in HS and is mainly stabilized as HU, while the HA becomes more aliphatic. We conclude that increases in SOC can be linked to changes in the molecular characteristics of HS fractions under long term fertilization.

Key words: carbon sequestration , humic acid , humin , long term fertilization , E4/E6 ratio

SONG Xiang-yun, LIU Shu-tang, LIU Qing-hua, ZHANG Wen-ju , HU Chun-guang. Carbon Sequestration in Soil Humic Substances Under Long-Term Fertilization in a Wheat-Maize System from North China[J]. Journal of Integrative Agriculture, 2014, 13(3): 562-569.

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Carbon Sequestration in Soil Humic Substances Under Long-Term Fertilization in a Wheat-Maize System from North China

Carbon Sequestration in Soil Humic Substances Under Long-Term Fertilization in a Wheat-Maize System from North China

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