65.保护地内为什么要应用滴灌技术?滴灌技术是当今世界上先进的节水灌溉新技术之一,具有省水、节能、省肥、省工、不占耕地、增产及提高作物品质、显著增加经济效益等优点。滴灌技术自七十年代开始在大田作物应用,尤其是在果树等生产灌溉上得到了较大面积的应用推广。但是滴灌技术在温室大棚等保护地(蔬菜、花卉、药材等)生产上应用仍停留在试验或试用阶段,尚未能大面积推广应用,大多数还采用着传统的畦灌方式,这样不但浪费水,而且还带来了土壤温度低、空气湿度大等问题。另外,在没有滴灌的保护地内施肥,只得用落后的人工来解决,又费力,又不均匀,挥发浪费也大,尤其 Drip irrigation technology is one of the advanced water-saving irrigation technologies in the world today. It has the advantages of saving water, saving energy, saving fertilizer, saving labor, not occupying arable land, increasing yield and improving crop quality, and remarkably increasing Economic benefits. Drip irrigation technology has been widely applied and popularized in field crops since the 1970s, especially in the irrigation of fruit trees and other production. However, the application of drip irrigation technology in the production of greenhouses and other protected areas (vegetables, flowers, medicinal materials, etc.) is still in the experimental or trial stage. However, it has not yet been popularized and popularized in large areas. Most of the drip irrigation techniques also use traditional irrigation method, , But also brought the soil temperature is low, air humidity and other issues. In addition, fertilization without protective field of drip irrigation can only be solved by backward manpower, which is laborious, non-uniform and volatile and wasteful, especially