2012•Jieshui guan'gaiRequires access
Effect of Drip Irrigation in Different Depth on Growth and Water-use Efficiency of Young Apple Trees
Binghua Liu
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Abstract
Subsurface drip irrigation is an important model of water-saving irrigation.One-year-old 'Gale Gala' apple trees grafted onto Malus hupehensis Rehd.were used to research the effects of drip irrigation in different depths on plants growth and water-use efficiency.Three treatments were executed: surface drip irrigation(served as control),middle(7 cm-underground) drip irrigation and deep(14 cm-underground) drip irrigation.The results showed that: compared with the surface control drip irrigation,the deep drip irrigation reduced the photosynthetic characteristics and root activity,but increased the root-shoot ratio and water use efficiency;the middle drip irrigation improved the gas exchange parameters and unchanged the root vigor and reduced water-use efficiency.In conclusion,the middle depth drip irrigation was much more benefit to apple trees vegetative growth and irrigation water-use efficiency than the other two irrigation regimes,which can be widely used in arid and semi-arid areas.