论文部分内容阅读
早在20世纪初,国外已开始利用营养液栽培蔬菜,但该法存在成本高和作物根系供氧不足等问题,随着塑料工业的发展,英国首先采用营养膜水培技术(即NFT栽培)种植番茄、黄瓜等蔬菜。随后,丹麦、荷兰、英国、日本、美国等又研究应用岩棉培和袋培等水培技术。营养膜栽培的特点是利用塑料薄膜等材料作栽培床,采用循环式供液的方式供应营养液,营养液在栽培床的底层呈膜状的浅层徐徐流动,保证作物根系有充分的
As early as the early 20th century, foreign countries started to use nutrient solution to cultivate vegetables. However, this method posed the problems of high cost and inadequate oxygen supply to the crop roots. With the development of the plastics industry, the UK first adopted the nutrition membrane hydroponics technique (ie NFT cultivation) Grow tomatoes, cucumbers and other vegetables. Subsequently, Denmark, the Netherlands, Britain, Japan, the United States and other research and application of rock and cotton culture and bag cultivation techniques such as hydroponics. Nutritional film cultivation is characterized by the use of plastic film and other materials for the cultivation of beds, the use of circular supply of liquid nutrient solution, nutrient solution in the bottom of the cultivation bed was film-like shallow shallow flow to ensure adequate crop roots