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[1]LEI Dong,HAN Lu-yan,JIAO Ju-ying,et al.Seed Loss Characteristics of Main Species in Loess Hilly-gullied Area by Simulated Rainfall Erosion[J].Research of Soil and Water Conservation,2011,18(01):1-6.

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Seed Loss Characteristics of Main Species in Loess Hilly-gullied Area by Simulated Rainfall Erosion

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 18 Number of periods: 2011 01 Page number: 1-6 Column: Public date: 2011-02-20

Title:: Seed Loss Characteristics of Main Species in Loess Hilly-gullied Area by Simulated Rainfall Erosion

Author(s):: LEI Dong¹, HAN Lu-yan^2,3, JIAO Ju-ying^1,2, WEN Zhong-ming^1,2; 1. College of Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China;
2. Institute of Soil and Water Conservation, Chinese Academy of Sciences & Ministry of Water Resources, Yangling, Shaanxi 712100, China;
3. Shandong National Technician College, Qingzhou, Shandong 262500, China

Keywords:: water erosion; seed loss; seed morphology; loess hilly-gullied area

CLC:: S154;S157

DOI:: -

Abstract:: For sparse vegetation and serious soil erosion in Loess Hilly-gullied area, the seed loss by surface runoff and sediment transport may has impacts on vegetation restoration. To analyze the seed loss characteristics of the main species in the loess hilly-gullied area, rainfall simulation experiments were carried out over 1 m² plots on 15°, 20°, 25° and 30° loess slopes for a 60-minute duration with intensities of 100 mm/h and 150 mm/h. The results showed that, there were 23 species (accounting for 79.3%) having seed loss with an average seed loss rate of 27.4%, heavier rainfall leads to higher seed loss ratio on same slope, while the effect of slope on seed loss was not more significant than rainfall intensity. The seed loss was also affected by the mass, shape, size and physiological feature of seed itself. Most seeds occurred seed loss with a mass below 50 mg, seed loss ratio has negative correlation with seed mass when it below 10 mg; when 10 mg < seed mass < 50 mg, seed shape and appendices come to be the main factors affecting seed loss, the round and oval seeds were prone to loss.

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