Effects Of Mulch-Drip Irrigation With Desalinated-Breakish-Water On Greenhouse Pepper And Muskmelon In Non-cultivated Land

Aiming at the problems of safe utilization of Brackish water, poor ability of moisture and fertilizer retention, low utilization of water and fertilizer in sandy sunlight greenhouse in Ningxia, field experiments were conducted in s sandy sunlight greenhouse in Xinrongcun, Helan county, Ningxia, northwest China. Taking Pepper and Muskmelon as the research object, drip irrigation under mulch as irrigation method, the experiments included different Brackish water desalination irrigation methods and different anti-seepage patterns and different irrigation quota. In order to find the optimal planting pattern to satisfy plant growth and to ensure high yield and quality, growth and yield indexes of Pepper and Muskmelon were investigated. The experiment results could provide a viable theoretical basis for sunlight greenhouse in Non-cultivated Land planting fruits or vegetablers. The main research conclusions are as follows:1, Using the method of orthogonal test, based on range analysis of the plant height, stem diamete, chlorophyll, photosynthesis, yield, quality and soil moisture content, we know that anti-seepage measures and Brackish water desalination irrigation methods are the main factors, irrigation quota is the secondary factor. So optimum theory combination programme is that the anti-seepage measure is all plastic film, irrigation methods is mixed irrigation(Desalinated water:Brackish water=1:1) and the irrigation quota is9m3/667m2. A reference combination programme is all plastic film+mixed irrigation+9m/667m.2, Using the method of contrast test, we have made a contrast experiment studied on five Brackish water desalination irrigation methods in the conditions of drip irrigation under mulch and planting Pepper and Muskmelon in sunlight greenhouse in Non-cultivated Land. Based on comparative analysis of the plant height, stem diamete, chlorophyll, photosynthesis, yield, quality and soil moisture content, we know that the yield of treatment1Mixed irrigation(Desalinated water:Brackish water=11), treatment2alternated irrigation(time), treatment3alternated irrigation(growth period) and treatment4Desalinated water irrigation are better than control group. The best yield-increasing effect are treatment4and treatment1; Based on quality analysis, we know that the best quality are CK and treatment1; Based on economic efficiency analysis, we know that treatment1less1/2brackish water desalination costs than treatment4. In conclusion, the best of Brackish water desalination irrigation methods is brackish water purification:brackish water=1:1.