已入深夜,您辛苦了!由于当前在线用户较少,发布求助请尽量完整的填写文献信息,科研通机器人24小时在线,伴您度过漫漫科研夜!祝你早点完成任务,早点休息,好梦!

Soil organic carbon changes in China's croplands: A newly estimation based on DNDC model

土壤碳 环境科学 中国 气候变化 固碳 背景(考古学) 温室气体 自然地理学 水文学(农业) 土壤科学 二氧化碳 地理 土壤水分 生态学 地质学 海洋学 生物 考古 岩土工程
作者
Wuhan Ding,Naijie Chang,Guilong Zhang,Jiahao Kang,Xiaopei Yi,Jing Zhang,Jianfeng Zhang,Ligang Wang,Hu Li
出处
期刊:Science of The Total Environment [Elsevier BV]
卷期号:905: 167107-167107 被引量:12
标识
DOI:10.1016/j.scitotenv.2023.167107
摘要

Soil Organic Carbon (SOC) in cropland represents a significant facet of the terrestrial ecosystem's carbon reservoirs, playing a pivotal role in global climate change mitigation efforts. Within the specific context of China, cropland SOC not only extends its implications beyond environmental impact but also serves as a critical factor in ensuring the stability and security of the nation's food supply. However, there is an ongoing argument about the changes in SOC and their spatial and temporal distribution patterns within China's croplands. In this study, we constructed a new county-level DNDC database for 2020, building upon 2003 research that quantified SOC stock in China's cropland using the DNDC model. Our aim was to assess the SOC storage and temporal changes of China's cropland in 2020 using same methodology to enhance estimation accuracy. The simulation results of the validated DNDC model revealed that the average SOC storage of China's croplands (0-30 cm) in 2020 was 6.02 Pg C, with the Northeast region contributing 23 % (1.37 Pg C). The SOC density in China varied from 18.55 to 152.57 t C ha-1, averaging at 49.65 t C ha-1. In 2020, China's cropland transitioned from a net loss of SOC in 2003 to a carbon sink, with cropland SOC density and SOC storage increased by 18.2 % and 21.6 % respectively. Notably, despite experiencing a loss of SOC compared to 2003, the Northeast region had the highest average SOC density in China. This study highlights that despite the increase in SOC density and storage in China's croplands over the last 17 years, there remains substantial potential for carbon sequestration given the current spatial distribution of SOC density's significant heterogeneity within China. The findings of this study offer data support for China's strategy to achieve food security and carbon neutrality.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
pK完成签到 ,获得积分10
刚刚
璨澄完成签到 ,获得积分10
1秒前
XOO发布了新的文献求助10
1秒前
2秒前
千倾完成签到 ,获得积分10
3秒前
3秒前
4秒前
tyy完成签到,获得积分10
5秒前
既温柔完成签到,获得积分20
5秒前
6秒前
6秒前
席江海完成签到,获得积分10
6秒前
weilei完成签到,获得积分10
6秒前
金金金发布了新的文献求助10
6秒前
7秒前
荷兰香猪完成签到,获得积分10
7秒前
tyy发布了新的文献求助10
7秒前
XOO完成签到,获得积分10
8秒前
苹果树下的懒洋洋完成签到 ,获得积分10
9秒前
11秒前
既温柔发布了新的文献求助10
13秒前
14秒前
慕青应助tyy采纳,获得10
15秒前
16秒前
王w完成签到 ,获得积分10
16秒前
端庄洪纲发布了新的文献求助30
19秒前
zho发布了新的文献求助10
19秒前
张元东完成签到 ,获得积分10
20秒前
西门浩宇完成签到 ,获得积分10
20秒前
Judy完成签到 ,获得积分0
20秒前
yaoyh_gc发布了新的文献求助10
20秒前
小蘑菇应助既温柔采纳,获得10
21秒前
往前走别回头完成签到,获得积分10
22秒前
刻苦紫文完成签到 ,获得积分10
23秒前
奔跑石小猛完成签到,获得积分10
24秒前
凶狠的猎豹完成签到,获得积分10
25秒前
26秒前
伊萨卡完成签到 ,获得积分10
26秒前
yutang完成签到 ,获得积分10
27秒前
yaoyh_gc完成签到,获得积分10
29秒前
高分求助中
Technologies supporting mass customization of apparel: A pilot project 600
Introduction to Strong Mixing Conditions Volumes 1-3 500
Tip60 complex regulates eggshell formation and oviposition in the white-backed planthopper, providing effective targets for pest control 400
Optical and electric properties of monocrystalline synthetic diamond irradiated by neutrons 320
共融服務學習指南 300
Essentials of Pharmacoeconomics: Health Economics and Outcomes Research 3rd Edition. by Karen Rascati 300
Peking Blues // Liao San 300
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 物理 生物化学 纳米技术 计算机科学 化学工程 内科学 复合材料 物理化学 电极 遗传学 量子力学 基因 冶金 催化作用
热门帖子
关注 科研通微信公众号,转发送积分 3800821
求助须知:如何正确求助?哪些是违规求助? 3346351
关于积分的说明 10329013
捐赠科研通 3062766
什么是DOI,文献DOI怎么找? 1681193
邀请新用户注册赠送积分活动 807414
科研通“疑难数据库(出版商)”最低求助积分说明 763691