Cited by 81Bioenergy crop production and managementBiofuel production and bioconversionSoil Carbon and Nitrogen Dynamics

Carbon consequences and agricultural implications of growing biofuel crops on marginal agricultural lands in China

Qin, Zhangcai, Zhuang, Qianlai, Zhu, Xudong, Cai, Ximing, Zhang, Xiao·2011·Environmental Science & Technology

Abstract

Using marginal agricultural lands to grow energy crops for biofuel feedstocks is a promising option to meet the biofuel needs in populous China without causing further food shortages or environmental problems. Here we quantify the effects of growing switchgrass and Miscanthus on Chinese marginal agricultural lands on biomass production and carbon emissions with a global-scale biogeochemical model. We find that the national net primary production (NPP) of these two biofuel crops are 622 and 1546 g C m(-2) yr(-1), respectively, whereas the NPP of food crops is about 600 g C m(-2) yr(-1) in China. The net carbon sink over the 47 Mha of marginal agricultural lands across China is 2.1 Tg C yr(-1) for switchgrass and 5.0 Tg C yr(-1) for Miscanthus. Soil organic carbon is estimated to be 10 kg C m(-2) in both biofuel ecosystems, which is equal to the soil carbon levels of grasslands in China. In order to reach the goal of 12.5 billion liters of bioethanol in 2020 using crop biomass as biofuel feedstocks, 7.9-8.0 Mha corn grain, 4.3-6.1 Mha switchgrass, or 1.4-2.0 Mha Miscanthus will be needed. Miscanthus has tremendous potential to meet future biofuel needs, and to benefit CO(2) mitigation in China.

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Crossref · 10.1021/es2024934

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Authors
Qin, Z., Zhuang, Q., Zhu, X., Cai, X., & Zhang, X.
Affiliations
  • Purdue University West Lafayette (US)
  • University of Illinois Urbana-Champaign (US)
Corresponding author
Qin, Zhangcai
Venue
Environmental Science & Technology
Published
2011-11-28
Volume
45
Issue
24
Pages
10765-10772
ISSN
  • 0013-936X (ISSN-L)
  • 1520-5851
OpenAlex
W1973166049
Cited by
81
References
71
Citations by year
2026: 1 · 2025: 3 · 2024: 9 · 2023: 7 · 2022: 5 · 2021: 7 · 2020: 5 · 2019: 4 · 2018: 5 · 2017: 5 · 2016: 4 · 2015: 7 · 2014: 10 · 2013: 6 · 2012: 3
FWCI
11.71
Type
journal article
Language
en
Open access
closed
Locations
  • Environmental Science & Technology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Aeronautics and Space Administration
  • Purdue University
Topics
  • Life Sciences › Agricultural and Biological Sciences › Agronomy and Crop Science › Bioenergy crop production and management
  • Physical Sciences › Engineering › Biomedical Engineering › Biofuel production and bioconversion
  • Life Sciences › Agricultural and Biological Sciences › Soil Science › Soil Carbon and Nitrogen Dynamics
Keywords
energy crops, marginal agricultural land, switchgrass, Miscanthus, net primary productivity, soil organic carbon, carbon sink, bioethanol, CO2 emission reduction, China
MeSH terms
Agriculture, Air Pollutants, Air Pollution, Carbon Dioxide, China, Environmental Monitoring, Food Supply, Crops, Agricultural, Biofuels, Carbon Footprint, Environmental Policy

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