Effects of Different Band Spacings of Riparian Sand-fixation Forest Belts on Soil Moisture and Vegetation Community Characteristics in Riverbank Sandy Areas
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    Abstract:

    [Objective] The coastal area of the Yellow River is one of the areas experiencing the most severe soil and water loss. The soil moisture and vegetation community characteristics of riparian-sand-fixing forest belt in sandy areas were studied under different zone spacing, and the belt spacing under the optimal allocation mode was determined in order to provide the basis for the construction of row and belt afforestation of riparian sand-fixing forest belt in sandy areas.[Methods] The study was conducted on sand-fixation forest belts with different band spacings at Xiliugou, Dalat Banner, Ordos City, Inner Mongolia. Soil sampling and vegetation surveys were carried out in the sand-fixation forest sample plots with different band spacings of 8 m, 16 m, 22 m, and 28 m. Soil physical properties and vegetation community characteristics were analyzed. The correlation between soil moisture and vegetation was also determined.[Results] ① The soil moisture and vegetation index of different sand-fixation forest belts increased with increasing band spacing. ② The soil moisture for different soil layers in the 0-100 cm soil layer in various zones of the band spacing also increased with the increasing horizontal spacing, and the change tended to be stable after 11 m. ③ Soil moisture in different zones was positively correlated with vegetation index in general, but the evenness index and richness index were different. The greater the band spacing, the better the vegetation restoration effect, and the peak value of the restoration effect was approximately reached when the band spacing was 22 m.[Conclusion] The vegetation restoration effect increased with increasing sand-fixation forest belt band spacing when sandy land was treated with a low coverage row-type sand-fixation forest, but it is not always that the wider the band spacing, the better the vegetation restoration effect. The 22 m band spacing had the best vegetation restoration effect of all of the row-type sand-fixation forest band spacings, and the near-natural restoration effect on sandy land was the best.

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黄伟,杨光,马勇,刘一.不同带间距对沙区河岸固沙林带的带间土壤水分和植被群落特征的影响[J].水土保持通报英文版,2024,44(1):9-19

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  • Received:June 26,2023
  • Revised:July 31,2023
  • Online: April 26,2024