市域尺度农村系统氮素流动及污染氮足迹核算——以沈阳市为例

doi:10.13287/j.1001-9332.202112.019

应用生态学报 ›› 2021, Vol. 32 ›› Issue (12): 4475-4487.doi: 10.13287/j.1001-9332.202112.019

市域尺度农村系统氮素流动及污染氮足迹核算——以沈阳市为例

翟家宁^1,2, 李宏庆^1,2, 任婉侠^1,3, 唐呈瑞^1,3, 薛冰^1,3*

¹中国科学院沈阳应用生态研究所, 沈阳 110016;
²中国科学院大学, 北京 100049;
³辽宁省环境计算与可持续发展重点实验室, 沈阳 110016

收稿日期:2021-03-18 修回日期:2021-09-29 出版日期:2021-12-15 发布日期:2022-06-15
通讯作者: *E-mail: xuebing@iae.ac.cn
作者简介:翟家宁, 男, 1997年生, 硕士研究生。主要从事产业生态学、农业农村系统营养物质流动及循环经济研究。E-mail: zhaijianing20@mails.ucas.ac.cn
基金资助:
国家自然科学基金项目(41971166)资助

Nitrogen flow and polluted nitrogen footprint accounting of rural systems at the municipal scale: The case of Shenyang

ZHAI Jia-ning^1,2, LI Hong-qing^1,2, REN Wan-xia^1,3, TANG Cheng-rui^1,3, XUE Bing^1,3*

¹Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China;
²University of Chinese Academy of Sciences, Beijing 100049, China;
³Key Laboratory for Environmental Computation and Sustainability of Liaoning Province, Shenyang 110016, China

Received:2021-03-18 Revised:2021-09-29 Online:2021-12-15 Published:2022-06-15
Contact: *E-mail: xuebing@iae.ac.cn
Supported by:
National Natural Science Foundation of China (41971166)

摘要/Abstract

摘要： 理解农村系统的氮素流动、排放和利用过程对减少农业活动引起的潜在环境污染和促进养分资源的可持续利用具有重要意义。本研究基于集成食物链养分流动模型和氮足迹模型,提出市域尺度农村系统氮核算框架,并从种植、动物养殖和农村人居3个子系统对1998—2018年沈阳市的氮素流、循环利用和污染氮足迹开展量化比较研究。结果表明: 2018年沈阳市种植子系统、动物养殖子系统和农村人居子系统的氮素利用率分别为36.1%、59.7%和70.1%,分别比1998年增长了15.9%、9.1%和0.7%;2018年沈阳市农村系统污染氮足迹总量为123.5 Gg,比1998年增长了21.6%;1998—2014年沈阳市农村系统污染氮足迹增长较快,随后有所下降;2018年种植子系统、动物养殖子系统和人居子系统中未利用氮素分别为129.5、62.2和8.7 Gg,相当于420.4、202.1和8.7 Gg氮肥的养分资源量。总体上,农村系统氮素利用率从生产端到消费端逐渐递增,但对农村系统氮素的时空分异情况还有待进一步的研究。

关键词: 人地关系, 氮足迹, 农村系统, 氮素流动, 沈阳市

Abstract: Understanding the process of nitrogen flow, emission, and utilization in rural systems is of great importance to reduce pollutant emissions caused by agricultural activities and to promote the sustainable utilization of nutrient resources. Based on the NUFER (nutrient flow in food chain, environment and resources use) model and nitrogen footprint approach, we proposed a nitrogen accounting framework for municipal-scale rural systems, and conducted a quantitative and time series-based comparative study on nitrogen flow, recycling, and footprint from the perspective of three subsystems, namely planting, animal husbandry, and rural human settlement in Shenyang from 1998 to 2018. The results showed that: 1) nitrogen utilization rates of the planting subsystem, animal husbandry subsystem, and rural human settlement subsystem were 36.1%, 59.7%, and 70.1%, respectively in 2018, with a growth rate of 15.9%, 9.1%, and 0.7% respectively compared to 1998; 2) The total polluted nitrogen footprint in Shenyang grew rapidly from 1998 to 2014, but declined from 2014 to 2018. In 2018, the total footprint of nitrogen pollution was 123.5 Gg, increasing by 21.6% compared with 1998; 3) In 2018, the unused nitrogen in the planting subsystem, animal husbandry subsystem, and rural human settlement subsystem were 129.5, 62.2, and 8.7 Gg, respectively, which were equivalent to 420.4, 202.1, and 8.7 Gg of nutrient resources from nitrogen fertilizer, respectively. In general, the nitrogen use efficiency of rural system increased gradually from the production end to the consumption end, but the temporal and spatial variation of nitrogen in rural systems need further studies.

Key words: human-natural system, nitrogen footprint, rural system, nitrogen flow, Shenyang City

翟家宁, 李宏庆, 任婉侠, 唐呈瑞, 薛冰. 市域尺度农村系统氮素流动及污染氮足迹核算——以沈阳市为例[J]. 应用生态学报, 2021, 32(12): 4475-4487.

ZHAI Jia-ning, LI Hong-qing, REN Wan-xia, TANG Cheng-rui, XUE Bing. Nitrogen flow and polluted nitrogen footprint accounting of rural systems at the municipal scale: The case of Shenyang[J]. Chinese Journal of Applied Ecology, 2021, 32(12): 4475-4487.

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市域尺度农村系统氮素流动及污染氮足迹核算——以沈阳市为例

Nitrogen flow and polluted nitrogen footprint accounting of rural systems at the municipal scale: The case of Shenyang

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