tailieunhanh - Effect of air injection under subsurface drip irrigation on yield and water use efficiency of corn in a sandy clay loam soil

Subsurface drip irrigation (SDI) can substantially reduce the amount of irrigation water needed for corn production. However, corn yields need to be improved to offset the initial cost of drip installation. Air-injection is at least potentially applicable to the (SDI) system. However, the vertical stream of emitted air moving above the emitter outlet directly toward the surface creates a chimney effect, which should be avoided, and to ensure that there are adequate oxygen for root respiration. A field study was conducted in 2010 and 2011, to evaluate the effect of air-injection into the irrigation stream in SDI on the performance of corn. Experimental treatments were drip irrigation (DI), SDI, and SDI with air injection. The leaf area per plant with air injected was and times greater in the aerated treatment than in DI and SDI, respectively. Grain filling was faster, and terminated earlier under air-injected drip system, than in DI. Root distribution, stem diameter, plant height and number of grains per plant were noticed to be higher under air injection than DI and SDI. Air injection had the highest water use efficiency (WUE) and irrigation water use efficiency (IWUE) in both growing seasons; with values of and in 2010 and and in 2011 for WUE and IWUE respectively. In comparison with DI and SDI, the air injection treatment achieved a significantly higher productivity through the two seasons. Yield increases due to air injection were and greater in 2010 and and in 2011 compared to the DI and SDI treatments, respectively. Data from this study indicate that corn yield can be improved under SDI if the drip water is aerated. | Effect of air injection under subsurface drip irrigation on yield and water use efficiency of corn in a sandy clay loam soil

• Nông nghiệp
• Drip irrigation
• Subsurface drip irrigation
• Air injection
• Sandy clay loam soil
• Water use efficiency
• Saline water
• Salt dynamics
• Cabbage (L Brassica oleracea var capitata)
• Drip irrigation in cabbage
• Irrigation on water dynamics
• Management of drip irrigation system
• Drip irrigation system
• Drip adopted farmers in management
• Suggestions offered
• Constraints faced
• Hydraulic performance
• Drip irrigation in tomato
• Economics of drip systems
• Paradigm shift towards modern irrigation systems
• Water use efficiency and economics
• Pigeon pea to drip irrigation
• Pigeon pea
• Bio fertilizers based fertigation schedule
• Varying levels of drip irrigation
• Drip irrigation on yield
• Quality parameters
• Economics of cucumber
• Tagetes erecta L
• African marigold (Tagetes erecta Linn)
• Fertigation through drip irrigation
• Irrigation scheduling
• Water saving
• Drip irrigation in wheat
• Deficit irrigation
• Irrigation levels
• Planting layout
• Turmeric yield and economics
• Friction loss
• Drip irrigation laterals
• Mathematical model
• Dimensional analysis
• Disc filter
• Head loss
• Drip irrigation systems
• Metal body disc filters
• Nano solar pump
• Gravity based drip irrigation
• Vegetable cultivation
• Gravity based drip irrigation system
• Major problem in rainfed areas
• Farmers in Bikaner district
• Drip irrigation system were selected randomly
• Panchayat samities
• Proper economization of water
• Greenhouse grown tomato
• Drip irrigation levels
• Soilless media
• Productivity and economics
• Economics of greenhouse grown tomato
• Surface and subsurface drip irrigation method
• Lateral and emitter spacings
• Textile waste water
• Vegetable crop
• Vegetable crop under drip irrigation
• Physiological parameters
• Seed germination
• Drip irrigation levels on amaranthus
• Amaranthus (Amaranthus hybridus L)
• Yield and water
• Efficiency under shade net
• Sandy loam soil
• Characterize the moisture distribution pattern
• Drip irrigation under sandy loam soil
• Better crop response
• Frictional head loss
• Pressure drop
• On farm drip irrigation systems design
• Farmers’ fields
• Electrical conductivity
• GSM modem
• Sensors and Solenoid valve
• Automated drip irrigation system
• Field level investigation
• Bt cotton
• Nitrogen and seed cotton yield
• Seed cotton yield
• Drip irrigation in Bt cotton
• Different mulch materials
• Vegetative growth
• Yield of ginger
• Ginger (Zingiber officinale Rosc )
• Influence of spacing
• Drip irrigation on yield attributes
• Pigeonpea (Cajanus cajan L )
• Colour plastic mulch
• Okra (Abelmoschus esculentus)
• Different levels of drip irrigation
• Growing period
• Plastic mulching
• Drip irrigation regimes
• Mulching in Mango
• Mango cv Pant sinduri