[1]LIU Shutong,JIAO Juying,HU Shu,et al.Effect of Flood Runoff on Seed Dispersal and Population Regeneration—A Case Study of Salix matsudana in the Loess Hill and Gully Region[J].Research of Soil and Water Conservation,2018,25(01):99-103.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
25
Number of periods:
2018 01
Page number:
99-103
Column:
Public date:
2018-02-28
- Title:
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Effect of Flood Runoff on Seed Dispersal and Population Regeneration—A Case Study of Salix matsudana in the Loess Hill and Gully Region
- Author(s):
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LIU Shutong1, JIAO Juying2, HU Shu2, WU Duoyang1, DENG Na2
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1. College of Forestry, Northwest A & F University, Yangling, Shaanxi 712100, China;
2. Institute of Soil and Water Conservation, Northwest A & F University, Yangling, Shaanxi 712100, China
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- Keywords:
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Salix matsudana; seeds; post-dispersal; flood runoff; check dam
- CLC:
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Q145
- DOI:
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- Abstract:
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With respect to the mat growth of Salix matsudana seedlings in both two check-dams after the heavy rains, the growth and distribution characteristics and mode of reproduction of Salix matsudana were investigated in the catchment with two check-dams. The results indicate that the distribution area, diameter of breast height (DBH), tree height and density of mature and young Salix matsudana in the catchment of check dam 1 are larger than those in the catchment of check dam 2. The larger area, DBH, tree height and density of Salix matsudana in check dam 1 were attributed to more low-lying valleys in check dam 1 than check dam 2, which creates suitable conditions for the growing of Salix matsudana. In addition, the wide distribution of adult Salix matsudana in check dam 1 has provided abundant seeds, leading to the predominance of seed dispersal distance. Flood runoff during 2013 and 2014 has transferred sediment to the dam land, causing increase of soil moisture and fertility conditions on dam land. The saplings of Salix matsudana are mostly found on the dam land, which come from seed propagation and germinated two years ago, some of them on outfall-land of valleys, which mostly come from vegetative propagation. Rainfall runoff during 2014 and 2015 has carried and gathered seeds of Salix matsudana to the dam land where is already suitable for seed germination and seedling growth. Overall, these results show that overland runoff can promote seed dispersal by taking seeds to habitats which are suitable for seed germination and seedling establishment, and even influence the pattern of population regeneration.