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我省盐城专区沿海防护林试验站,今年继续进行了林带防护效果的观测研究。该林带是以洋槐为主的乔木,配置有苦楝、桑树、乌桕和紫穗槐等树种,株行距为1米,五年生,目前树高4.5米, 形成上密下疏的林相,经测定透风系数;树冠层为32.08%、中层为65.45%、下层为60%。半年以来,经过观测试验,进一步了解到防护林带对防风、保湿增加土壤水分和保障农作物丰收方面,起着显著的作用。1.不同的风向风速受林带的影响,风速有显
Yancheng Prefecture Coastal Shelterbelt Experimental Station in our province continued to carry out observation and study on the protective effect of forest belt this year. The forest belt is acacia-based tree, equipped with Melia, mulberry, black mulberry and Amorpha fruticosa and other tree species, plant spacing of 1 meter, perennial, currently 4.5 meters high tree, forming the upper and lower dense sparse forest facies, the measured ventilation Coefficient; canopy layer is 32.08%, middle layer is 65.45%, lower layer is 60%. After six months of observation, we have further learned that shelterbelt plays a significant role in preventing wind and moisture, increasing soil moisture and ensuring the harvest of crops. 1. Different wind speed by the impact of the belt, the wind speed was significant