温室梨枣树土壤水分和品质对调亏灌溉的响应

Effects of Regulated Deficit Irrigation on Soil Water and Fruit Quality of Pear-jujube Tree in Greenhouse

为探明调亏灌溉对温室梨枣树水分利用效率及梨枣品质的影响,以日光温室生长的9年生矮化密植成龄梨枣树为试材,试验设置充分供水处理(处理1(CK)),萌芽展叶期重度亏水处理(处理2),萌芽展叶期中度亏水处理(处理3)和果实膨大期中度亏水处理(处理4)。结果表明,亏水处理有利于提高梨枣树的根系吸水能力,促进根系向土壤深处生长,同时显著降低棵间蒸发;与CK相比,处理2和处理3对梨枣品质的所有指标都起到了提高和改善的作用,其中处理2最佳,处理3次之;综合考虑不同生育期调亏灌溉对梨枣树各项指标的影响,萌芽展叶期中度亏水能较好的改善果实品质,是实施调亏灌溉的最佳阶段。

In order to investigate the effects of regulated deficit irrigation on water use efficiency and fruit quality of pear-jujube tree in greenhouse,nine-year-old pear-jujube trees in greenhouse were studied.The experimental treatments included the sufficient water supply during the whole growing period（treatment 1）,moderate water deficits at the bud burst to leafing stage（treatment 2）,high water deficits at the bud burst to leafing stage（treatment 3） and moderate water deficits at fruit growth stage（treatment 4）.The results indicated that the different deficit irrigation levels at different growth periods had significant impact on the deep growth of root and evaporation among pear-jujube trees.Water deficits treatments at the stage of 2 and 3 had advanced the fruit quality of pear-jujube,stage 2 is better than stage 3.Water deficit during bud burst to leafing stage had deeply advanced the fruit quality and water use efficiency.It is the best stage to deficit irrigation.