Response of Soil Organic Carbon and Total Nitrogen Stocks to Desertification of Chinaagropastoral Transitional Zone: A Study of the Southeastern Edge of the Mu Us Sandy Land

Yang, Min; Ma, Zhanying; Zhang, M.C.

doi:10.15666/aeer/1802_29752988

Cited by 3 publications

(3 citation statements)

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“…Slope in cultivated land < In the area of 15°, roadside and field shelterbelts are mainly used, and the main afforestation belt is built on steep slopes and steep ridges, and the distance between rows and plants is 2m. High-quality tree species suitable for local planting should be selected to plant different tree species between fields, so that one kind of tree can be planted on one road, with two lines planted on the main road, and a single line planted on the side of the approach canal and the field production road, so as to form a mixed forest network and prevent the occurrence of crop diseases and pests [15].…”

Section: Farmland Protection Projectmentioning

confidence: 99%

Discussion on Technical Measures for High Standard Farmland Construction

Zhang,

Wang,

Hou

2024

SJT

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The construction of high-standard farmland is an important measure to improve the quality of cultivated land and ensure the national grain. In this context, this paper discusses the concept, connotation and objectives of high-standard farmland construction through the literature method and combined with years of experience in high-standard farmland construction engineering technology, summarizes the technical points of high-standard farmland construction, and looks forward to the development trend of high-standard farmland construction technology in China in the future, in order to provide methods and references for China's high-standard farmland construction.

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Section: Farmland Protection Projectmentioning

confidence: 99%

Discussion on Technical Measures for High Standard Farmland Construction

Zhang,

Wang,

Hou

2024

SJT

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“…In general, C and N in soil should accumulate in ecosystems whenever their corresponding inputs are greater or their losses are lower [40]. By studying the soil-vegetation relationship across desertification stages in the southeast margin of Mu Us Desert, Yang et al [41] found that the main source of soil C and N inputs was litter decomposition. Accordingly, the presence of more litter should result in a greater accumulation of C and N in soil [42].…”

Section: Effects Of C Korshinskii Afforestation On Stocks Of Soc and Stnmentioning

confidence: 99%

Soil Carbon and Nitrogen Stocks and Their Influencing Factors in Different-Aged Stands of Sand-Fixing Caragana korshinskii in the Mu Us Desert of Northwest China

Yu,

Yang,

Norghauer

et al. 2024

Forests

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Establishing artificial sand-fixing shrubs is a key measure to curb dune flow and drive changes in the soil stocks and cycling of carbon and nitrogen. But our understanding of these dynamics across years of sand-fixing afforestation and the factors influencing them remains inadequate, making it hard to accurately assess its capacity to sequester carbon. To fill that knowledge gap, this study investigated soil organic carbon (SOC) and soil total nitrogen (STN) stocks in Mu Us Desert under artificial sand-fixing shrub stands of different ages (10, 30, 50, and 70 years old) vis-à-vis a mobile sand dune, to determine whether Caragana korshinskii afforestation improved stock characteristics and whether SOC and STN stocks were correlated during the restoration processes. The results showed that the pattern observed is consistent with an increase over time in the stocks of both SOC and STN. At 10, 30, 50, and 70 years, these stocks were found to be 1.8, 2.3, 3.2, and 5.5 times higher for SOC, and 1.3, 1.6, 2.1, and 2.7 times higher for STN, respectively, than those of the control (mobile sand) dune. Stocks of SOC and STN mainly increased significantly in the 0–10 cm soil layer. The SOC stock was correlated positively with the STN stock as well as the C:N ratio. The slope of the regression for the C:N ratio against stand age was positive, increasing slightly faster with afforestation age. Additionally, our findings suggest that during the establishment of artificial stands of shrubs, the size of the STN stock did not expand as fast as the SOC stock, resulting in an asynchronous N supply and demand that likely limits the accumulation of soil organic matter. This research provides important evidence for the sustainable development of desertified ecosystems.

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“…It is a typical ecologically fragile area and one of the most serious desertification areas in northern China. In the Mu Us Desert, a large number of soft rock rich in clay minerals are interdistributed with aeolian sand, among which, soft rock with abundant reserves is distributed in 1.67 × 10 6 ha area in the Mu Us Sandy Land of 3.98 × 10 6 ha (Wang et al, 2014;Yang et al, 2017). Soft rock has low diagenetic degree and low structural strength.…”

Section: Introductionmentioning

confidence: 99%

Response of soft rock and sand compound soil structure to freeze-thaw cycles in Mu Us Sandy Land, China

Zhang,

Cao,

Guo

et al. 2024

Front. Environ. Sci.

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In order to accurately understand the relationship between soil structure and climate feedback in the frozen soil area of Mu Us Sandy Land, China, and to explore the key control factors for the structural stability of soft rock and sand compound soil under freeze-thaw environment, the indoor freeze-thaw simulation experiment was applied. The results show that the freeze-thaw period, clay content, organic matter and their interactions have significant effects on the stability of composite soil aggregates. After 10 freeze-thaw cycles, the aggregate content in the 1:0, 1:1, 1:2, and 1:5 composite soil with a diameter greater than 1 mm decreased by 55%, 34%, 44%, and 57%, while the aggregate content with a diameter less than 1 mm increased by 91%, 70%, 66%, and 87%, and the aggregate composition of each particle size is mainly concentrated in the range of 0.25–0.5 mm. Under freeze-thaw conditions, the changes of clay and aggregate content in different proportions of composite soil is the same, all showing 1:1>1:2:>1:5, and 1:1 composite soil with >0.25 mm aggregate content is the highest. Under freeze-thaw alternations, 1:1, 1:2 and 1:5 composite soil aggregates (<0.5 mm) showed a significant positive correlation with soil organic matter, while there is no significant correlation between large aggregates (>1 mm) and soil organic matter. In conclusion, the freeze-thaw cycle reduces the structural stability of composite soil aggregates, and clay are the key controlling factors for the formation and structural stability of composite soil aggregates.

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Response of Soil Organic Carbon and Total Nitrogen Stocks to Desertification of Chinaagropastoral Transitional Zone: A Study of the Southeastern Edge of the Mu Us Sandy Land

Cited by 3 publications

References 0 publications

Discussion on Technical Measures for High Standard Farmland Construction

Discussion on Technical Measures for High Standard Farmland Construction

Soil Carbon and Nitrogen Stocks and Their Influencing Factors in Different-Aged Stands of Sand-Fixing Caragana korshinskii in the Mu Us Desert of Northwest China

Response of soft rock and sand compound soil structure to freeze-thaw cycles in Mu Us Sandy Land, China

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