抗堵塞滴头研制与根际滴灌技术集成应用研究

为了解决滴灌水直接输送根际和滴头堵塞的技术问题,开发研制了一种可埋于地下的多变量抗堵塞滴头。经山地红枣不同灌溉试验证明,滴灌、渗灌、根际滴灌产量比不灌溉分别增产12 075、15 145和15 150kg/hm2;WUE分别提高66.94%、72.07%、72.07%,净收入分别增加62 536.0、73 494.0、76 086.0元/hm2。滴灌、渗灌、根际滴灌年使用折旧期分别为8、6、12年。

Anti-clogging Emitter and Root-zone Drip Irrigation Technology

Root system of the economic forests mainly distributes in deep soil.As a result of the water scarcity in the mountainous region,there is not sufficient drip irrigation water infiltrating into the root system layer.In addition,the emitter clogs up easily when irrigation water is carried to the root-zone by subirrigation.To tackle these problems,a kind of multivariable anti-clogging emitter was developed.Proved by different irrigation technologies applied into jujube in mountainous region,compared with jujube without irrigation,drip irrigation,subirrigation and root-zone drip irrigation could increase yields by 12 075,15 145 and 15 150 kg/hm2,respectively,while the increasing of water use efficiency was 66.94%,72.07% and 72.07%.And drip irrigation,subirrigation and root-zone irrigation got more net income,62 536.0,73 494.0,76 086.0 yuan/hm2,than without irrigation.The depreciation period of drip irrigation,subirrigation,root-zone was 8,6 and 12 years.