2007年3月,湖南省农业厅经济作物处从美国引进“脐变枝”品种10枝芽条,在试验棚内以16年生朋娜脐橙为中间砧,高位嫁接了8株树。2008年3月,利用这些高接树上的枝条建立“脐变枝”高接试验园,面积1333m~2,以7年生麻阳冰糖橙为中间砧嫁接120株。高接试验园地处安化县柘溪水库南岸的山坡梯土上,坡度15°~20°,土壤为 In March 2007, the Department of Economic Crops of Hunan Provincial Department of Agriculture introduced 10 branches of “umbilical twigs” from the United States. In the test shed, 16-year-old friend Navel orange was used as the intermediate anvil, and 8 trees were grafted high. March 2008, the use of these high access tree branches to establish “umbilical branch ” high access test garden, an area of ​​1333m ~ 2, 7-year-old Mayang rock candy orange grafted 120 as the intermediate anvil. High pick test park is located in Anhua County Tainan reservoir hillside slope soil, slope 15 ° ~ 20 °, soil