| Impact of wind-speed and straw-mulching on soil water evaporation |
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| DOI：10.7606/j.issn.1000-7601.2011.03.35 |
| Key Words: soil water evaporation straw-mulching wind arid and semi arid region |
| Author Name | Affiliation | | LI Xiaoming | College of Resources and Environment,Northwest A & F University, Yangling, Shaarnxi 712100, China | | WANG Fei | College of Resources and Environment,Northwest A & F University, Yangling, Shaarnxi 712100, China
Institute of Soil and Water Conseroation, Chinese Academy of Sciences &. Ministry of Water Resources, Yangling, Shaanxi 712100,China | | HU Lin | College of Resources and Environment,Northwest A & F University, Yangling, Shaarnxi 712100, China | | MU Xingmin | College of Resources and Environment,Northwest A & F University, Yangling, Shaarnxi 712100, China
Institute of Soil and Water Conseroation, Chinese Academy of Sciences &. Ministry of Water Resources, Yangling, Shaanxi 712100,China |
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| Abstract: |
| The impacts of wind-speed and straw-mulching on soil water evaporation were measured and analyzed
with 9 treatments of three wind-speeds (calm wind，0.5 or 1.5 m/s) and three straw-mulching levels (0，4 120， or 8 240 kg/ hm2). The results showed that when the water content was 70% of the field moisture capacity and mulching (0, 4 120kg/hm2) was the same， the soil water evaporation with wind-speed 1.5 m/s was significantly higher than other treatments; when the water content was higher than 55% of the field moisture capacity，the cumulative soil water evapo-ration with no mulching and wind-speed 1.5 m/s was far more than that of other treatments. There lies an exponential relationship between the cumulative soil water evaporation (E) and time (t) (E=atb)， and the parameters (a and b) have clear differences among the treatments of wind-speed and straw mulching levels. |
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