北京市喷、滴灌事业从试酸示范到推广已经历了十三个年头。就其发展过程来看,可分为两个阶段。第一阶段(1973—1980年),1977年以前,在少数区、县试验示范,1978年以后,在全市各区县较大面积进行了推广,发展喷灌面积4万亩。其中发挥效益的2万亩。第二阶段(1981—1986年),主要在1983—1986年期间,新发展了7.4万亩,基本 Beijing spray, drip irrigation trials from the demonstration to promote it has gone through thirteen years. In terms of its development process, it can be divided into two stages. The first phase (1973-1980), before 1977, in a small number of districts and counties pilot demonstration, after 1978, in all districts and counties in the city a large area to promote the development of sprinkler area of ​​40,000 mu. Which play 2 million mu of benefits. In the second stage (1981-1986), a total of 74,000 mu were newly developed during 1983-1986, basically