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Title: Quantifying the impacts of agricultural management and climate change on soil organic carbon changes in the uplands of Eastern China

Abstract

In order to implement optimal farming practices for increasing soil organic carbon (SOC) in agro-ecosystems, there is a need for understanding how management practices and climate change alter SOC levels. This study quantified the influence of agricultural management practices and climatic factors on SOC changes in Eastern China’s upland-crop fields in northern Jiangsu Province for the period of 2010–2039, by using the DeNitrification-DeComposition (DNDC, version 9.5) model. We utilized the currently most detailed soil database, which is at a scale of 1:50,000, containing 17,024 soil polygons derived from 983 upland soil profiles. Across all the examined scenarios of agricultural management practices, our results show that the carbon sequestration potential in the upper layer soil (0–50 cm) of the study area varied from 6.93 to 155.11 Tg C during 2010–2039, with an average rate of 59 to 1317 kg C ha-1 year-1. As a promising alternative, the combined scenario of crop residue return rate of 50% and farmyard manure incorporation rate of 50% is recommended for agricultural management practice in this region. Meanwhile, climate conditions play a significant role in the annual SOC changes as well. Air temperature increase of 2–4 °C leads to 3.41–7.51 Tg C decrease in SOC undermore » conventional management for the entire study region. Decreasing or increasing precipitation by 20% would increase 0.57 Tg C or decrease 1.09 Tg C under the conventional management scenario, respectively. Additionally, among all the soil groups, the fluvo-aquic soils have the highest C sequestration rate in most scenarios. Our findings could be used to inform optimal agricultural management toward climate mitigation.« less

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1406793
Report Number(s):
PNNL-SA-130217
Journal ID: ISSN 0167-1987
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Resource Relation:
Journal Name: Soil and Tillage Research; Journal Volume: 174; Journal Issue: C
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 60 APPLIED LIFE SCIENCES

Citation Formats

Zhang, Liming, Wang, Guangxiang, Zheng, Qiaofeng, Liu, Yaling, Yu, Dongsheng, Shi, Xuezheng, Xing, Shihe, Chen, Hanyue, and Fan, Xieyu. Quantifying the impacts of agricultural management and climate change on soil organic carbon changes in the uplands of Eastern China. United States: N. p., 2017. Web. doi:10.1016/j.still.2017.06.005.
Zhang, Liming, Wang, Guangxiang, Zheng, Qiaofeng, Liu, Yaling, Yu, Dongsheng, Shi, Xuezheng, Xing, Shihe, Chen, Hanyue, & Fan, Xieyu. Quantifying the impacts of agricultural management and climate change on soil organic carbon changes in the uplands of Eastern China. United States. doi:10.1016/j.still.2017.06.005.
Zhang, Liming, Wang, Guangxiang, Zheng, Qiaofeng, Liu, Yaling, Yu, Dongsheng, Shi, Xuezheng, Xing, Shihe, Chen, Hanyue, and Fan, Xieyu. Fri . "Quantifying the impacts of agricultural management and climate change on soil organic carbon changes in the uplands of Eastern China". United States. doi:10.1016/j.still.2017.06.005.
@article{osti_1406793,
title = {Quantifying the impacts of agricultural management and climate change on soil organic carbon changes in the uplands of Eastern China},
author = {Zhang, Liming and Wang, Guangxiang and Zheng, Qiaofeng and Liu, Yaling and Yu, Dongsheng and Shi, Xuezheng and Xing, Shihe and Chen, Hanyue and Fan, Xieyu},
abstractNote = {In order to implement optimal farming practices for increasing soil organic carbon (SOC) in agro-ecosystems, there is a need for understanding how management practices and climate change alter SOC levels. This study quantified the influence of agricultural management practices and climatic factors on SOC changes in Eastern China’s upland-crop fields in northern Jiangsu Province for the period of 2010–2039, by using the DeNitrification-DeComposition (DNDC, version 9.5) model. We utilized the currently most detailed soil database, which is at a scale of 1:50,000, containing 17,024 soil polygons derived from 983 upland soil profiles. Across all the examined scenarios of agricultural management practices, our results show that the carbon sequestration potential in the upper layer soil (0–50 cm) of the study area varied from 6.93 to 155.11 Tg C during 2010–2039, with an average rate of 59 to 1317 kg C ha-1 year-1. As a promising alternative, the combined scenario of crop residue return rate of 50% and farmyard manure incorporation rate of 50% is recommended for agricultural management practice in this region. Meanwhile, climate conditions play a significant role in the annual SOC changes as well. Air temperature increase of 2–4 °C leads to 3.41–7.51 Tg C decrease in SOC under conventional management for the entire study region. Decreasing or increasing precipitation by 20% would increase 0.57 Tg C or decrease 1.09 Tg C under the conventional management scenario, respectively. Additionally, among all the soil groups, the fluvo-aquic soils have the highest C sequestration rate in most scenarios. Our findings could be used to inform optimal agricultural management toward climate mitigation.},
doi = {10.1016/j.still.2017.06.005},
journal = {Soil and Tillage Research},
number = C,
volume = 174,
place = {United States},
year = {Fri Dec 01 00:00:00 EST 2017},
month = {Fri Dec 01 00:00:00 EST 2017}
}