RESPONSE OF FRAGRANT PEAR GROWTH TO DIFFERENT MICRO-IRRIGATION CONDITIONS

摘要

The situation that water is becoming increasingly scarce and micro-irrigation canrnenhance water use efficiency is recognized worldwide. Until now, the Korla fragrant pearrntrees were irrigated by traditional flood irrigation in the west of China, so there is greatrnpotential to cut down agricultural water use. The response of fragrant pear trees tornmicro-irrigation management under field conditions in Xinjiang Uygur AutonomousrnRegion was conducted in 2009. There were four irrigation approaches: (1) surface driprnirrigation; (2) subsurface drip irrigation; (3) micro–sprinkling irrigation; (4) traditional floodrnirrigation. Three micro-irrigation treatments were fully irrigated to the 80% ET everyrnweek during the whole growing season. Soil water potential, vegetative growth,rnproduction and fruit quality were measured in this experiment.rnMicro-irrigation treatments could save 700mm of total irrigation water, 50% of that withrnflood irrigation. Results indicated that pear fruit yield and fruit quality were slightlyrninfluenced. In particular, the VC content of pears at micro-sprinkler treatment exceededrn60% of that with flood irrigation, at the level of 0.24mg/100g. Wherefore, changing therninefficient irrigation method to micro-irrigation is necessary for Korla fragrant pear inrnXinjiang region.