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.