摘要
前言滴灌是一种能高度控制作物生长所需土壤水分条件,调节土壤肥力和盐分状况的先进灌水技术。滴灌的特点是以细小的出水孔口、以较小的滴水流量给作物均匀供水。其流量一般为2～4L/h。
Preliminary investigations are made to determine the blockage of the emitters (pipe type Ⅰ) and its mechanism in this paper. The results show that the flow rates of all tested emitters tend to decrease markedly, some of them are blocked completely during the testing period (50 days). The results obtained from the tests on water samples indicate that the precipitation of carbonate and the breeding of aquatic biology are the main cause of the blockage. Therefore, in addition to the application of filters, chemical treatement must be given to the water samples by using the techniques of drip irrigation.
出处
《喷灌技术》
北大核心
1989年第2期2-5,63,共4页
关键词
滴头
堵塞
机理
滴灌
排灌设备
emitter
chemoblockage
bioblockage
experiment.
