| Characteristics of splash detachment rate under millet canopy |
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| DOI：10.7606/j.issn.1000-7601.2010.01.24 |
| Key Words: millet crop canopy detachment rate rainfall intensity simulated rainfall |
| Author Name | Affiliation | | MA Bo | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China | | WU Faqi | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China | | MA Fan | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| The objective of this study was to investigate the characteristics of splash detachment rate under millet (Setaria italica Beauv) canopy compared to bare ground. The experiment was conducted using an indoor rainfall simulator. The detachment rate under millet canopy with different LAI from about 0.86 to 3.11 and on bare ground was measured using splash cups. The designed rainfall intensities of 40 and 80 mm/h were applied when detachment rate
was measured under canopy, and intensities of 20, 40, 60, 80, 100, 120 and 140 mm/h were applied on bare ground. Compared to bare ground, the average detachment rate under millet canopy through growing season reduced by about 24% with designed rainfall intensity of 40 mm/h, and reduced by about 52% with intensity of 80 mm/h. The detachment rate under millet canopy might be higher than that on bare ground under certain conditions. There was no obvious relationship between changes of average detachment rate under millet canopy and canopy development. Under millet canopy, no significant relationship was found between the detachment rate at different positions and corresponding rainfall intensity at the same place, but on bare ground, there was a significant exponential relationship between detachment rate and rainfall intensity. |
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