六.膜上灌技术(一)膜上灌的概念膜上灌是节水增产灌溉新技术,是我国的创造发明.在地膜栽培的基础上,把膜侧水流改为膜上流,利用土膜输水,通过放苗孔和灌水孔给作物供水的灌溉方法叫膜上灌.利用地膜输水防止了地面灌溉的深层渗漏,地面灌溉畦(沟)首尾进水时差造成灌水不均匀,而膜上灌则可通过调整膜畦上、中、下游的膜孔密度和大小,达到均匀灌水的目的. Membrane irrigation technology (a) the concept of membrane irrigation Membrane irrigation is a new technology of water-saving irrigation, is our invention .In the film culture, based on the film side of the water flow into the membrane, the use of soil film Water delivery through the Fangmiao holes and irrigation holes to the crop water irrigation method called membrane irrigation.Use of membrane water to prevent the surface water leakage, ground irrigation 畦 (ditch) head water intake caused by uneven irrigation, and Membrane irrigation can be adjusted by membrane 畦, middle and lower membrane pore density and size, to achieve the purpose of uniform irrigation.