论文部分内容阅读
滴灌是五十年代发展起来的一种新的灌溉技术。由于它具有明显的省水、增产效果,目前世界上许多国家都十分重视它的发展。据有关资料统计:1974年,全世界滴灌面积只有87万亩;到1976年就增加到173万亩。预计1981年全世界滴灌面积将要达到379万亩。1974年,在敬爱的周恩来总理的关怀下,滴灌技术由墨西哥引进到我国,先后在北京郊区、山东、辽宁、四川、新疆等24个省、市、自治区,一百四十多个县,二百多个单位试
Drip irrigation is a new irrigation technology developed in the 1950s. Because of its obvious water saving and stimulation effect, many countries in the world attach great importance to its development. According to relevant statistics, in 1974, the area of drip irrigation in the world was only 870,000 mu. By 1976, it increased to 1.73 million mu. It is estimated that the area of drip irrigation in the world will reach 3.79 million mu in 1981. In 1974, under the care of the beloved Premier Zhou Enlai, drip irrigation technology was introduced into our country from Mexico. In the suburbs of Beijing, Shandong Province, Liaoning Province, Sichuan Province and Xinjiang Uygur Autonomous Region successively, more than 140 counties, More than a hundred units test