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据英国《新科学家》1990年7月28日报道,西班牙发明家安东尼奥·伊瓦涅斯·阿尔瓦研制出一种人工树,若把足够多的人工树和天然林共同栽培,沙漠在10年之内就会绿化。利比亚正计划种植3～4万株树,进行小规模试验。人工树能造成较冷的空气,它在沙漠中寒冷的夜间吸收潮气,然后把潮气保留在树的躯干内。在炎热的白昼,湿气缓缓释放出来,使空气冷却。人工树的高度在7～10米之间,用防火材料聚氨酯和酚醛泡沫制作,模拟天然树水分蒸发和冷凝的各个阶段,而无须人工或天然灌溉。人工树由根、躯干和叶子三部分组成。管状树下内是装满了遍布纹沟的聚氨酯材料,这些纹沟靠毛细作用吸收水分。为了能在白天保留和慢慢蒸发水分,树干内有几层不同密度的聚氨酯。树根由3根空心管组成,待人工树植下之后,用高压把聚氨酯注进空心管中,并渗进土壤里,形成很长的聚氨酯塑块。半小时以后这些塑块就会冷却下来,可延
According to the British “New Scientist” reported on July 28, 1990, the Spanish inventor Antonio Ibanez Alva developed a kind of artificial tree. If enough artificial trees and natural forests were cultivated, Will be green within. Libya is planning to plant 30000 to 40000 trees for small-scale trials. Artificial trees create colder air, which absorbs moisture in the cold night in the desert, then retains the moisture in the trunk of the tree. On a hot day, the moisture is slowly released and the air cools. The height of the artificial tree is between 7 and 10 meters and is made of fireproof polyurethane and phenolic foam to simulate the various phases of natural tree water evaporation and condensation without artificial or natural irrigation. Artificial tree by the root, trunk and leaves of three parts. Tubular tree is filled with ubiquitous polyurethane material, these grooves by capillary action to absorb moisture. In order to retain and slowly evaporate water during the day, the trunk has several layers of different density polyurethane. The root of the tree is composed of three hollow tubes. After the artificial tree is planted, the polyurethane is injected into the hollow tube with high pressure and infiltrated into the soil to form a long polyurethane plastic block. Half an hour later these plastic blocks will be cooled down