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| Windbreak Efficiency of Two Types of Simulated Shrub Forest Equally Planted in Field |
| Liu Hujun, Yuan Hongbo, Guo Chunxiu, Xu Xianying, Wang Duoze, Li Xuemin, Liu Kailin |
| Key Laboratory of Desertification and Aeolian Sand Disaster Combating of Gansu Province -State Key Laboratory Breeding Base, Gansu Desert Control Research Institute, Lanzhou 730070, China |
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Abstract It is an effective method for controlling wind and fixing moving sand to establish shrub forest, and construction and configuration of windbreak forest is a key study aspect for enhancing function of windbreak shrub forest. Two types of windbreak shrub forest with equal spacing in the rows and between rows were established to observe wind velocity in forest and in front of forest and compare the wind break effect of forest configuration. The results showed that the cutdown ratio of wind velocity of simulated shrub forest without leaf with upwind projected area of 0.25 m2 was less by 10%-20% than simulated shrub forest with leaves with upwind projected area of 0.39 m2 at the wind velocity of 4.6-10.7 m·s-1 with equal spacing in the rows and between rows. The wind velocity of two types of simulated shrub forest had exponent function relationship with height change, while that there was well fitting for the exponent function relationship over shifting sandy land. The roughness of simulated shrub forest was five times that of shifting sandy land, but it was different at different wind velocity. The windbreak efficienly can be increased by optimal configuration of shrub forest with equal spacing in the rows and between rows.
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Received: 29 September 2014
Published: 20 January 2015
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2015, Vol. 35 
