在我国南方部分地区,夏秋两季气温高,天气炎热,暴雨多,光照强烈,沿海地区还常常有台风袭击。因此许多经济作物、名贵药材、蔬菜、花卉等,每年都要遭受不同程度的灾害,造成经济上的巨大损失。六、七、八三个月在华南不少地区因气温太高,光照过强不宜蔬菜生长而造成蔬菜供应紧张的局面。当地农民为了抗御自然灾害,常常采用竹杆、木杆、混凝土柱等作支撑,用竹帘、草帘、秸杆等作覆盖物进行遮荫,生产少量的蔬菜产品,供应市场。这些设施大多数结构简陋,用料杂乱,抗灾能力差,经不起大风、暴雨的袭击而造成损失,而且覆盖面积都比较小,费工费时,效果不好,又难以推广应用。针对上述情况以及栽培专家的建议,中国农业工 In parts of southern China, summer and autumn are characterized by hot temperatures, hot weather, heavy rainstorms and strong light intensity. Typhoon attacks are often also carried out in coastal areas. Therefore, many cash crops, valuable medicinal herbs, vegetables, flowers and so on are subject to different degrees of disasters every year, causing huge economic losses. In six, seven, eight or three months in many areas in southern China due to the temperature is too high, the light is too strong vegetable growth caused by the tight supply of vegetables situation. In order to resist natural disasters, local peasants often use bamboo poles, wooden poles, concrete columns as the support, and cover them with bamboo curtains, straw curtains, straw and the like for shade, and produce a small amount of vegetable products for the market. Most of these facilities have simple structures, messy materials, poor disaster-resistant ability, and can not afford to be hit by gale and torrential rain. They also have relatively small coverage areas, time-consuming and inefficient work, and are difficult to popularize and apply. In view of the above situation and the suggestion of cultivation experts, Chinese agricultural workers