Impacts of agricultural intensity on soil organic carbon pools in a main vegetable cultivation region of China

Yang Liu, Dongsheng Yu, Ning Wang, Xuezheng Shi, Eric David Warner, Haidong Zhang, Falv Qin

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Agricultural intensity, a function of agricultural input and output, impacts agricultural soil organic carbon (SOC) pools. Investigating the agricultural intensity and SOC density relationship supports understanding of anthropogenic activities on SOC pools in agricultural regions. Cangshan County, one of the most important vegetable cultivation counties in China, was selected as the study area for this investigation. By using soil survey data compiled in 1980 and 2008, 21 towns in Cangshan County were used as study units to investigate the relationship between agricultural intensity indicators and index, with SOC density. Results demonstrate that single agricultural intensity indicators could not reflect SOC densities changes well. Conversely the agricultural intensity index, a composite measure of agricultural input, output and input-output indicators (AI1, AI2 and AI3, respectively), was a more reliable measure reflecting SOC density variability. An S-curve model, SOCd (tha-1)=exp (α-β/AIi), was the best fit for the plot of SOC densities with the agricultural intensity index. Relationships between AI3 and SOC density were statistically significant for 1980, 2008 and their variation during 2008-1980 (p<0.05), indicating that AI3 had a more robust relationship with SOC density compared with AI1 and AI2. Though the relationships have low precision (R2=0.24-0.40) for not including the natural factors and more indictors relative to variation of SOC density should be selected to improve the interpretability, it is still valuable to introduce the agricultural intensity index when detecting dynamics of SOC pools at a large regional scale.

Original languageEnglish (US)
Pages (from-to)25-32
Number of pages8
JournalSoil and Tillage Research
Volume134
DOIs
StatePublished - Aug 13 2013

Fingerprint

vegetable growing
carbon sinks
soil organic carbon
organic carbon
China
soil
vegetable cultivation
soil survey
soil surveys
agricultural soils
agricultural soil
towns
anthropogenic activities
human activity

All Science Journal Classification (ASJC) codes

  • Agronomy and Crop Science
  • Soil Science
  • Earth-Surface Processes

Cite this

Liu, Yang ; Yu, Dongsheng ; Wang, Ning ; Shi, Xuezheng ; Warner, Eric David ; Zhang, Haidong ; Qin, Falv. / Impacts of agricultural intensity on soil organic carbon pools in a main vegetable cultivation region of China. In: Soil and Tillage Research. 2013 ; Vol. 134. pp. 25-32.
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abstract = "Agricultural intensity, a function of agricultural input and output, impacts agricultural soil organic carbon (SOC) pools. Investigating the agricultural intensity and SOC density relationship supports understanding of anthropogenic activities on SOC pools in agricultural regions. Cangshan County, one of the most important vegetable cultivation counties in China, was selected as the study area for this investigation. By using soil survey data compiled in 1980 and 2008, 21 towns in Cangshan County were used as study units to investigate the relationship between agricultural intensity indicators and index, with SOC density. Results demonstrate that single agricultural intensity indicators could not reflect SOC densities changes well. Conversely the agricultural intensity index, a composite measure of agricultural input, output and input-output indicators (AI1, AI2 and AI3, respectively), was a more reliable measure reflecting SOC density variability. An S-curve model, SOCd (tha-1)=exp (α-β/AIi), was the best fit for the plot of SOC densities with the agricultural intensity index. Relationships between AI3 and SOC density were statistically significant for 1980, 2008 and their variation during 2008-1980 (p<0.05), indicating that AI3 had a more robust relationship with SOC density compared with AI1 and AI2. Though the relationships have low precision (R2=0.24-0.40) for not including the natural factors and more indictors relative to variation of SOC density should be selected to improve the interpretability, it is still valuable to introduce the agricultural intensity index when detecting dynamics of SOC pools at a large regional scale.",
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Impacts of agricultural intensity on soil organic carbon pools in a main vegetable cultivation region of China. / Liu, Yang; Yu, Dongsheng; Wang, Ning; Shi, Xuezheng; Warner, Eric David; Zhang, Haidong; Qin, Falv.

In: Soil and Tillage Research, Vol. 134, 13.08.2013, p. 25-32.

Research output: Contribution to journalArticle

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AU - Yu, Dongsheng

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AU - Shi, Xuezheng

AU - Warner, Eric David

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AU - Qin, Falv

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