无土基质栽培滴灌工程的研究

Research on Drip-irrigation Engineering of Soilless Substyate Culture

为在无土基质栽培中应用滴灌工程,本文分析了我国温室及大棚技术经济条件和无土栽培对滴灌的要求,指出采用“低压自压式滴灌系统”,并研究出一套可行的设计计算方法。阐述了按该方法设计的滴灌系统总布置特点及实际运行测定结果。论述了滴头选择依据与三种类型滴头的水力学特性及使用性能对比,结果表明,专门设计的WD型边槽式滴头最适于使用、推广。

For the application of drip-irrigation engineering in the soilless substyate culture, this paper analyzes the technical and economic conditions of domestic greenhouses and plastic tunnels and the requirements of soilless culture for drip irrigation, points to adopt 'the drip-irrigation system with low and natural pressure ', develops a whole set of feasible method for design and calculation, expounds the special features in overall layout and the measuring results in practical operation in accordance with this design method, discusses the selection basis of emitters, the hydraulic features of three kinds of emitters, and the contrast in their applying property. It is shown from the results that the WD-trough emitter specialized in design is most suitable for adoption and popularization.