[目的]晚熟柑橘果实若遇到低温冻害天气,则会出现落果、枯水等现象,严重影响果实商品价值,树冠覆膜是防控晚熟柑橘冬季冻害的有效方式之一,为此,研究不同树冠覆盖材料对血橙果实品质的影响,以期为柑橘生产中树冠覆膜技术的科学应用提供理论依据.[方法]比较了农用塑料薄膜、无纺布、遮阳网3种树冠覆盖材料对塔罗科血橙果实品质的影响.[结果]农用塑料薄膜在提高果面亮度(L值),果实可溶性固形物、维生素C、可食率方面效果最好;遮阳网在提高果面呈现红色(a值)、黄色(b值)效果最好;无纺布在降低果实酸度,提高果实固酸比方面效果最好.[结论]综合果实内外品质来看,农用塑料薄膜最适宜作为塔罗科血橙冬季树冠覆盖材料,无纺布次之,而利用遮阳网进行树冠覆盖虽然能使果实更偏向于红-黄色,但会明显降低果实可食率.
[Objective]In the event of low temperature and freezing damage to late maturing citrus fruits,there will be fruit drop,dry water and other phenomena,which will seriously affect the commercial value of fruits.Canopy coating is one of the effective ways to prevent and control winter freezing damage of late maturing citrus.Therefore,the influence of different cano-py covering materials on fruit quality of blood orange was studied in order to provide theoretical basis for the scientific applica-tion of canopy coating technique in citrus planting.[Methods]The effects of three canopy covering materials,namely agricultur-al plastic film,non-woven fabric,and shading net,on the fruit quality of Taroko blood orange were compared.[Results]The results showed that the agricultural plastic film had the best effect on improving the Surface brightness(L value),soluble sol-ids,vitamin C and edible rate of fruit.The shading net has the best effect on improving the appearance of red(a value)and yellow(b value)on the fruit surface;Non woven fabrics have the best effect in reducing fruit acidity and improving fruit solid acid ratio.[Conclusion]From a comprehensive perspective of the internal and external quality of the fruit,agricultural plastic film is the most suitable material for winter canopy covering of Taroko blood orange,followed by non-woven fabrics.Although using shading nets for canopy covering can make the fruit more inclined towards red yellow,it will significantly reduce the edi-ble rate of the fruit.