[1]CUI Jian,DANG Xiaohong,WANG Ji,et al.Characteristics of Soil Particle Size and Organic Matter After Five Years of Laying Different Specifications of Degradable Sand Barriers[J].Research of Soil and Water Conservation,2022,29(02):92-98.
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Characteristics of Soil Particle Size and Organic Matter After Five Years of Laying Different Specifications of Degradable Sand Barriers
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
29
Number of periods:
2022 02
Page number:
92-98
Column:
Public date:
2022-03-20
- Title:
- Characteristics of Soil Particle Size and Organic Matter After Five Years of Laying Different Specifications of Degradable Sand Barriers
- Keywords:
- PLA sand barrier; surface sediment; grain size characteristics; soil organic matter; Kubuqi Desert
- CLC:
- S152.3; S151.9+3
- DOI:
- -
- Abstract:
- In order to investigate the characteristics of soil grain size and organic matter content after the biodegradable sand barrier was laid for 5 years, soil samples of 0—3 cm in the PLA sand barrier with different sizes(0.5 m×0.5 m, 1 m×1 m and 2 m×2 m)and different slope positions(bottom, middle and top)were collected in the southeastern edge of the Kubuqi Desert. The change of soil particle size determined by laser particle size analyzer and organic matter content and their correlation were analyzed. The results are as follows:(1)the soil in PLA sand barrier is mainly composed of fine sand and coarse sand. With the increase of laying specifications, the content of fine sand increases gradually, and the content decreases in the order: 2 m×2 m(80.66%)> 1 m×1 m(75.8%)> 0.5 m×0.5 m(45.15%); the highest contents of fine sand at the slope tops of 3 specification sand barries are 23.39%, 31.73% and 41.17%, respectively; the highest contents of coarse sand in middles slope are 44.91%, 36.42% and 42.88%, respectively;(2)the uniformity of sorting in the barrier becomes worse, and the peakness deviates from the normal distribution; some bands of frequency distribution curve of sediment particles become narrower, and the surface particles become coarse-grained gradually;(3)the soil organic matter contents decreases in the order: 1 m×1 m > 0.5 m×0.5 m > CK > 2 m×2 m; the organic matter contents in the slopes of the three specifications showed the order of bottom > middle > top; there is a significant positive correlation between the content of organic matter and very fine sand, and a significant negative correlation between the content of organic matter and medium sand. The above results indicate that 1 m×1 m PLA sand barrier has better protection efficiency in this study area, 1 m×1 m PLA sand barrier and slope bottom are conducive to organic matter accumulation, and very fine sand and medium sand are the key grain sizes for organic matter accumulation.
- References:
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Last Update:
2022-04-20