Soil organic carbon losses due to land use change in a semiarid grassland

Qiu, Liping; Wei, Xiaorong; Zhang, Xingchang; Cheng, Jimin; Gale, William F.; Guo, Chao; Long, Tao

doi:10.1007/s11104-011-1099-x

Cited by 112 publications

(79 citation statements)

References 40 publications

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“…The present study found that the SOC concentration tended to increase following the conversion of native grassland to cropland, which was different from many reports of SOC depletion after cultivation (Qiu et al 2012;Shang et al 2012;Poeplau and Don 2013). Declines in SOC concentration due to cultivation have been attributed to the decrease in plant litter inputs (Shang et al 2012) and increase in SOC mineralization resulting from aggregation disruption (Qiu et al 2012).…”

Section: Cultivation Of Desert Grassland Soilcontrasting

confidence: 99%

“…Declines in SOC concentration due to cultivation have been attributed to the decrease in plant litter inputs (Shang et al 2012) and increase in SOC mineralization resulting from aggregation disruption (Qiu et al 2012). But then, Qiu et al (2012) found the SOC loss rate of 0.60 Mg C ha −1 yr −1 in cropland was greater than those observed in a more arid region after similar LUC, and less than those observed in a more humid region. At the west end of Loess Plateau, the climate is semi-arid and drought-prone, and the native vegetation is desert grassland.…”

Section: Cultivation Of Desert Grassland Soilmentioning

confidence: 99%

“…LUC in semiarid and arid regions generally involves conversion of grassland to cropland and vice versa, as well as afforestation and abandonment (Raiesi 2012;Wang et al 2012). The conversion of grassland into cropland is typical of LUC cascades in the world, and SOC losses have been observed, particularly at the uppermost soil horizon (Wang et al 2011;Qiu et al 2012;Poeplau and Don 2013). However, Wu et al (2003) also found a significant increase in SOC density for the irrigated silting soil in an arid climate zone in northwest China.…”

Section: Introductionmentioning

confidence: 99%

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Response of soil properties and C dynamics to land-use change in the west of Loess Plateau

Zhang

Zhao

Xie

2014

Soil Science and Plant Nutrition

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Land-use change (LUC) is widely considered a major factor that affects soil organic carbon (SOC) sequestration. The impacts of four LUC types on soil properties, SOC, particulate organic carbon (POC) and labile organic carbon (LOC) at the 0-100 cm depth were examined in the west of Loess Plateau, northwest China. Bulk density at the 20-40 cm depth increased significantly after native grassland conversion to cropland, while artificial grassland establishment and abandonment on former cropland caused reverse change. Soil water content in the profile increased 60-230% after cultivation and decreased 32-49% after abandonment (p < 0.01). The particle size distribution also showed a response to LUC. Only artificial grassland establishment caused an SOC sink of 32% at the 0-10 cm depth as well as two labile fractions. SOC tended to increase after cultivation and after abandonment, with 6% and 20% at soil surface, respectively. There were increasing trends in POC and LOC. After afforestation on former native grassland, SOC tended to decrease (23%) at the 0-10 cm depth while POC and LOC tended to increase (33% and 6%, respectively). Principal component analysis was successful in separating LUC through soil property parameters. Carbon sequestration is largely ascribed to increased below-ground production and tillage elimination after perennial alfalfa (Medicago sativa L.) plantation. Irrigation and fertilization activities contribute to SOC accumulation after cultivation to some extent. The self-restoration dynamic depending on time since abandonment is important to SOC change. A lower proportion of stabilized carbon results in a slow rate of SOC accumulation after afforestation. It is necessary to investigate the long-term dynamic after LUC.

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Section: Cultivation Of Desert Grassland Soilcontrasting

confidence: 99%

Section: Cultivation Of Desert Grassland Soilmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Response of soil properties and C dynamics to land-use change in the west of Loess Plateau

Zhang

Zhao

Xie

2014

Soil Science and Plant Nutrition

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“…Soil organic matter (SOM) is rich in lignin. Plant peroxidases participate in the biosynthesis of lignin, a complex biomaterial whose carbon content is associated with the improvement of the aggregation, chemical, and agricultural properties of the soil (Bauer & Black, 1994;Li-xia & Jian-jun, 2003;Eynard et al, 2004;Qiu et al, 2012;Chintala et al, 2015a). Lignin is a product of the polymerization of one or more of sinapyl, cinnamyl, and coniferyl alcohols precursors to give rise to the syringyl (S), guaiacyl (G), and p-hydroxyphenyl (H) units respectively in the lignin structure (Higuachi, 1985;Fukushima, 2001;Kalsoom et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Regulated Lignin Structural Units and Soil Organic Carbon Content by Cowpea Peroxidase

Osuji¹,

Madu²,

Duffus³

et al. 2016

JAS

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Peroxidases participate in lignin biosynthesis, but there is no biochemical resolution between the structural units of lignin and soil organic carbon (SOC) contents. Black-eyed beans are staple high-protein foods for millions of at-risk populations in every continent. Its cultivation in semiarid zones could be leveraged to maximize SOC sequestration. Cowpea was treated with stoichiometric mixes of mineral nutrients. Peroxidase was electrophoretically purified from leaves, and assayed for o-dianisidine (guaiacyl units) and pyrogallol (p-hydroxyphenyl units) substrate specificities. Lignin, and SOC compositions were determined by gravimetry. Sulfate-treated cowpea produced the highest lignin (318.88 kg·ha ). The high SOC sequestration technology involving fertilization with stoichiometric mixes of mineral nutrients could enable limited resource farmers who cultivate cowpeas as cover crop in the Sahel to improve SOM while producing their staple crop.

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“…Total soil C (organic plus inorganic C) in rangeland soils to a 1-m depth ranges from 90 to 266 Mg C ha -1 (Guo, Amundson, Gong, & Yu, 2006). Total ecosystem C is greater for shrublands compared to grasslands, due to more aboveground biomass C (Pinno & Wilson, 2011;Qiu et al, 2012). The main factor controlling the fate of soil organic matter (which contains about 57% soil organic carbon, SOC, by weight), in rangelands is the effect of management on vegetation composition (Derner & Schuman, 2007).…”

Section: Introductionmentioning

confidence: 99%

Plant and Soil Consequences of Shrub Management in a Big Sagebrush-Dominated Rangeland Ecosystem

Derner¹,

Schuman²,

Follett³

et al. 2013

ENRR

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This study investigated plant and soil (organic carbon, SOC) responses to shrub management in western U.S. rangeland dominated by Wyoming big sagebrush (Artemisia tridentata Nutt. ssp. wyomingensis Beetle & Young). Plants and soils were sampled in 2009 from paired sets of treatments (mowing to 10 cm height, aerial herbicide application of Spike® 20P [tebuthiuron]) in Sandy and Loamy ecological sites. Plant responses to mowing were consistent for both ecological sites with 1) no effects on live, but three-to four-fold increases in dead, Wyoming big sagebrush plant density, 2) reduced height and cover of Wyoming big sagebrush, 3) increased cover of perennial grasses, and 4) no effects on bare ground. For soils, increased SOC did occur with herbicide application in the Loamy site for both the 0-5 cm (43% increase) and 5-15 cm (17% increase) soil depths, which corresponded to annual soil C sequestration rates of 0.16 and 0.14 Mg C ha -1 yr -1 for the 0-5 and 5-15 cm soil depths, respectively. Shrub management in Wyoming big sagebrush-dominated rangelands affects the plant component for two different ecological sites, whereas effects on SOC were observed only when density of live Wyoming big sagebrush plants was reduced through selective herbicide use.

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Soil organic carbon losses due to land use change in a semiarid grassland

Cited by 112 publications

References 40 publications

Response of soil properties and C dynamics to land-use change in the west of Loess Plateau

Response of soil properties and C dynamics to land-use change in the west of Loess Plateau

Regulated Lignin Structural Units and Soil Organic Carbon Content by Cowpea Peroxidase

Plant and Soil Consequences of Shrub Management in a Big Sagebrush-Dominated Rangeland Ecosystem

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