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伏令夏橙春季开花后,在翌年夏季成熟,品质优良,可填补鲜食与加工的淡季所以是极重要的甜橙良种。在我国,四川盆地最先引进与栽培此良种,但冬季落果较重,通常可达30-70%。12.5℃以下的低温是脱落的主要外因。我们经过长时间的研究,证实在11月初、12月初与1月初喷布25、75、50ppm的2,4-D各1次;在较寒冷的冬季,于1月下旬、2月上旬加喷50、25ppm的2,4-D各1次,能有效地控制冬季落果,并且对果实品质很少影响。
Summer Orange is the most important sweet orange seed after the spring summer orange blossom. It matures in the following summer, with good quality and can fill the off-season of fresh food and processing. In our country, the first introduced and cultivated this kind of seed in Sichuan basin, but the heavy winter fall, usually up to 30-70%. The low temperature below 12.5 ℃ is the main extrinsic factor. After a long period of research, we confirmed that 25,75 and 50ppm of 2,4-D were sprayed once in early November, early December and early January of each month. In the colder winter, spray in late January and early February 50,25ppm 2,4-D each 1 times, can effectively control the winter dropped fruit, and the fruit quality rarely affected.