Cropland soil organic matter content change inNortheast China, 1985-2005

Yao, Yao; Ye, Liming; Tang, Huajun; Tang, Pengqin; Wang, Deying; Si, Haiqing; Hu, Wenjun; Ranst, Éric Van

doi:10.1515/geo-2015-0034

Cited by 13 publications

(13 citation statements)

References 41 publications

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“…The regression results show that southward location, low altitude, low slope, annual accumulated temperature ≥10℃ and higher population are the major factors that influence the spatial distribution of cropland. Soil type also has a certain influence on cropland, which agrees with previous studies (Chen et al, 2013;Yao et al, 2015;Zhang et al, 2011). Finally, wetland (0.90) and grassland (0.82) have relatively low ROC values.…”

Section: Statistical Regression In 2000supporting

confidence: 89%

Model-based analysis of spatio-temporal changes in land use in Northeast China

Xia

Zhou

et al. 2015

J. Geogr. Sci.

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Spatially explicit modeling techniques recently emerged as an alternative to monitor land use changes. This study adopted the well-known CLUE-S (Conversion of Land Use and its Effects at Small regional extent) model to analyze the spatio-temporal land use changes in a hot-spot in Northeast China (NEC). In total, 13 driving factors were selected to statistically analyze the spatial relationships between biophysical and socioeconomic factors and individual land use types. These relationships were then used to simulate land use dynamic changes during 1980¨C2010 at a 1 km spatial resolution, and to capture the overall land use change patterns. The obtained results indicate that increases in cropland area in NEC were mainly distributed in the Sanjiang Plain and the Songnen Plain during 1980¨C2000, with a small reduction between 2000 and 2010. An opposite pattern was identified for changes in forest areas. Forest decreases were mainly distributed in the Khingan Mountains and the Changbai Mountains between 1980 and 2000, with a slight increase during 2000¨C2010. The urban areas have expanded to occupy surrounding croplands and grasslands, particularly after the year 2000. More attention is needed on the newly gained croplands, which have largely replaced wetlands in the Sanjiang Plain over the last decade. Land use change patterns identified here should be considered in future policy making so as to strengthen local eco-environmental security

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Section: Statistical Regression In 2000supporting

confidence: 89%

Model-based analysis of spatio-temporal changes in land use in Northeast China

Xia

Zhou

et al. 2015

J. Geogr. Sci.

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“…The major foundation species in the plant community is Stipa baicalensis, while the dominant species is Leymus chinensis, with a range of associated species, including Cleistogenes squarrosa, Melissilus ruthenica, Carex duriuscula, Ixeris chinensis, and some other weeds. Kastanozems is the dominant soil type in the region [44,45].…”

Section: Site Descriptionmentioning

confidence: 99%

Effects of Fence Enclosure on Vegetation Community Characteristics and Productivity of a Degraded Temperate Meadow Steppe in Northern China

Nie

Chen

et al. 2020

Applied Sciences

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Species composition and biomass are two important indicators in assessing the effects of restoration measures of degraded grasslands. In this paper, we present a field study on the temporal changes in plant community characteristics, species diversity and biomass production in a degraded temperate meadow steppe in response to an enclosure measure in Hulunbuir in Northern China. Our results showed that the plant community responded positively to the fence enclosure in terms of vegetation coverage, height, above- and belowground biomass. A year-to-year increase in aboveground biomass was observed, and this increase plateaued at the ninth year of the enclosure. Our results also showed that the existing dominant and foundation species gained predominance against other species. The sum of the biomass of these two species was more than doubled after the ninth year of the enclosure. However, belowground biomass only briefly increased until the fifth year of the enclosure and then decreased until the end of the experimental period. Plant diversity, evenness, and richness indices showed similar trends to that of belowground biomass. Overall, we found that the degraded temperate meadow steppe responded significantly positively to the enclosure treatment, but an optimal condition was only reached after approximately 5–7 years of continuous protection, providing a solid use case for grassland conservation and management at regional scales.

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“…Furthermore, with such variables, it is possible to identify the changes in the quality of agriculture directly and indirectly by selecting wind erosion, water erosion, runoff, and organic carbon loss as the agro-environmental variables having an impact on cropland stability and productivity [5,13,28]. Soil erosion by wind and water is highly related to cropland stability, and runoff and organic carbon loss are strongly associated with cropland productivity in regard to the retention of soil organic matter.…”

Section: Agro-environmental Variables In Croplandsmentioning

confidence: 99%

“…Variables related to cropland organic matter are the most important indicators influencing soil quality and productivity, and any change has a direct influence on crop productivity. Thus, changes are reflected in continuous adjustments of fertilizer applications [11,28]. It is necessary to introduce management approaches if the actual food production is to increase in accordance with the increased cropland area in North Korea [57].…”

Section: Implications For Crop Growth Cropland Stability and Food Smentioning

confidence: 99%

Impact of Deforestation on Agro-Environmental Variables in Cropland, North Korea

et al. 2017

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Deforestation in North Korea is becoming the epitome of the environmental change occurring in the Korean Peninsula. This study estimates the agro-environmental variables of North Korea's croplands and analyzes the impact of deforestation using the GEPIC (GIS-based EPIC (Environmental Policy Integrated Climate)) model and time-series land cover maps. To identify the changes in agricultural quality under deforestation, wind erosion, water erosion, organic carbon loss, and runoff were selected as the agro-environmental variables having an impact on cropland stability and productivity. Land cover maps spanning the past three decades showed that 75% of the forests were converted to croplands and that 69% of all converted croplands were originally forests, confirming the significant correlation between deforestation and cropland expansion in North Korea. Despite limitations in the verification data, we conducted qualitative and quantitative validation of the estimated variables and confirmed that our results were reasonable. Over the past 30 years, agro-environmental variables showed no clear time-series changes resulting from climate change, but changes due to spatial differences were seen. Negative changes in organic carbon loss, water erosion, and runoff were observed, regardless of the crop type. On newly-converted agricultural lands, runoff is 1.5 times higher and water-driven erosion and soil organic loss are more than twice as high compared to older croplands. The results showed that the agro-environment affected by deforestation had an impact on cropland stability and productivity.

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Cropland soil organic matter content change inNortheast China, 1985-2005

Cited by 13 publications

References 41 publications

Model-based analysis of spatio-temporal changes in land use in Northeast China

Model-based analysis of spatio-temporal changes in land use in Northeast China

Effects of Fence Enclosure on Vegetation Community Characteristics and Productivity of a Degraded Temperate Meadow Steppe in Northern China

Impact of Deforestation on Agro-Environmental Variables in Cropland, North Korea

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