Spatial distribution of soil organic carbon and its influencing factors under the condition of ecological construction in a hilly-gully watershed of the Loess Plateau, China

Zhao, Bingqiang; Li, Zhanbin; Li, Peng; Xu, Guoce; Gao, Haidong; Cheng, Yuting; Chang, Enhao; Yuan, Shuilong; Zhang, Yi; Zhang, Feng

doi:10.1016/j.geoderma.2017.02.010

Cited by 125 publications

(54 citation statements)

References 35 publications

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“…SOC stocks can differ significantly due to the influence of local factors such as topography, soil properties, or land use and management [43][44][45]. Previous studies reported that elevation is significantly correlated with SOC content [46][47][48][49], which is consistent with the results of the present study in which top SOCD increased with increasing altitude (Figure 3). This is because the accumulation of SOC at a higher altitude may potentially result from decreases in temperature and increasing levels of soil moisture [50][51][52].…”

Section: Environmental Factors Affecting Top Socd In Highland Agriculsupporting

confidence: 92%

Factors Controlling Soil Organic Carbon Sequestration of Highland Agricultural Areas in the Mae Chaem Basin, Northern Thailand

et al. 2020

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Understanding the effect of the environment, crop types, and land management practices on the organic carbon sequestration of top soil is crucial for adopting management strategies in highland agricultural areas. The objectives of this study are: (1) to estimate top soil organic carbon density (SOCD) of different crop types and (2) to analyze the factors controlling top SOCD in highland agricultural areas. The top soil layers from 0 to 30 cm depths were collected from the Mae Chaem basin, Northern Thailand. The results showed that the highest top SOCD was found soil used for growing upland rice, which contained an average of 58.71 Mg C ha−1. A significant difference between the top SOCD was detected between areas where minimum tillage and conventional tillage of various crops, with average of values 59.17 and 41.33 Mg C ha−1, respectively, for areas growing strawberries; 61.14 and 37.58 Mg C ha−1, respectively, for cabbage, and 71.15 and 39.55 Mg C ha−1, respectively, for maize. At higher elevation, the top SOCD was high, which may be due to high clay content and low temperature. Increased use of chemical fertilizers lead to increases in top SOCD, resulting in increased crop yields. Elevation, bulk density, N and K2O fertilizers were the main factors controlling the top SOCD at all sites.

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Section: Environmental Factors Affecting Top Socd In Highland Agriculsupporting

confidence: 92%

Factors Controlling Soil Organic Carbon Sequestration of Highland Agricultural Areas in the Mae Chaem Basin, Northern Thailand

et al. 2020

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“…A similar result was reported by Xu [41]. This result was due to the decreased amount of decomposed debris of plants and animals with increasing soil depth [42][43][44]. The soil total nitrogen contents of the topsoil layer (0-20 cm), subsoil layer (20-50 cm) and deep soil layer (50-80 cm) of RF were less than those of CK.…”

Section: Total Nitrogensupporting

confidence: 84%

Soil Quality Change after Reclaiming Subsidence Land with Yellow River Sediments

Duo

2018

Sustainability

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With continuous population growth and decreasing cultivated land area, China’s food security is greatly threatened. Additionally, coal mining in China is primarily underground mining, which causes land subsidence and destroys existing cultivated land. This effect aggravates the contradiction between a growing population and a shrinking area of cultivated land. The purpose of this study was to introduce a method of filling reclamation with Yellow River sediments to restore farmland and realize the sustainable utilization of cultivated land. The properties of the soil and crop yields in reclaimed farmland were assessed. This study examined farmland reclaimed with Yellow River sediments at an experimental site located in Jining City, Shandong Province, China. Filling reclamation procedures with Yellow River sediments were applied. The reclaimed farmland (RF) and unaltered farmland (CK) were continuously monitored for three years, and the soil was sampled six times. A total of 180 soil samples were collected from RF and CK. The soil properties were measured at three depths: 0–20 cm, 20–50 cm, and 50–80 cm. Crop yields were monitored regularly. The results indicate that filling reclamation with Yellow River sediments is an effective method for restoring farmland. The RF and CK soils were weakly alkaline, non-saline soils. The RF soil was suitable for the growth of local crops. With an increasing number of farming years, both the quality of cultivated land and crop yields have increased. Therefore, filling reclamation with Yellow River sediments is an effective way to realize the sustainable utilization of cultivated land.

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“…The changes in the redistribution of eroded soil and SOC were possible to influence by human activities, such as land use changes and reservoir construction (Liu et al, ; Wang et al, ; Wang, Wu, et al, ; Zhao et al, ). Compared with the erosion during 1995–1996, there was significant reduction in erosion in the upper reach of the Yangtze River and the Yellow River during 2010–2012 (Figure b).…”

Section: Discussionmentioning

confidence: 99%

Redistribution of Soil Organic Carbon Induced by Soil Erosion in the Nine River Basins of China

et al. 2019

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Global soil erosion redistributes a large amount of soil organic carbon (SOC) and is potential to significantly change the terrestrial carbon budget. However, there are large uncertainties in the redistribution of SOC within the terrestrial and aquatic ecosystems. Based on two national survey data sets on soil erosion and sediment measurements from hydrological stations, this study estimated the redistribution of sediment and SOC in the nine river basins of China during 1995China during -1996China during and 2010China during -2012. Over these two periods, 3.55-4.50 Pg of soil and 68.42-77.32 Tg C of SOC were eroded each year. For the SOC budget, on average 57% and 47% of the eroded SOC was deposited over land, 25% and 44% was deposited in the channel, and 18% and 8% was delivered into the sea during 1995-1996 and 2010-2012, respectively. Compared with the corresponding magnitudes during 1995-1996, the eroded SOC, the SOC deposited over land, and the SOC discharged into the sea decreased during 2010-2012, and only the SOC deposited into the river channel increased (from 19.5 to 30.1 Tg C yr −1 ). The changes in SOC deposition in the channel of the Yangtze River and the Yellow River basins demonstrate that the influence of human activities is extensive. Our results show that the erosion-induced redistribution of SOC alters the carbon budget of China.

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Spatial distribution of soil organic carbon and its influencing factors under the condition of ecological construction in a hilly-gully watershed of the Loess Plateau, China

Cited by 125 publications

References 35 publications

Factors Controlling Soil Organic Carbon Sequestration of Highland Agricultural Areas in the Mae Chaem Basin, Northern Thailand

Factors Controlling Soil Organic Carbon Sequestration of Highland Agricultural Areas in the Mae Chaem Basin, Northern Thailand

Soil Quality Change after Reclaiming Subsidence Land with Yellow River Sediments

Redistribution of Soil Organic Carbon Induced by Soil Erosion in the Nine River Basins of China

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