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(一)夏橙(包括伏令夏橙及五月红)是甜橙中的优良品种,它在开花后的第二年4—5月成熟,此时正是一般柑桔的商品淡季,因而具有特殊的经济价值,是重要的外销品种。四川栽培伏令夏橙、五月红已有30多年的历史,但过去未认识它的特性,加上冬季落果严重(落果率高达30—70%),所以很少发展。解放以来,特别是无产阶级文化大革命以来,经过开展群众科学实验,证明夏橙(在加强肥水管理基础上,冬季喷布2,4—D防止落果)产量高(20年生树可达300斤以上),品质好(含糖8%以上,含酸1%左右,酸
(A) Summer oranges (including Summer Orange and May Red) are excellent varieties of sweet orange that mature in April-May of the second year after flowering, which is the off-season of common citrus, thus Has a special economic value, is an important export varieties. Summer orange is cultivated in Sichuan Province. MayHubei has a history of more than 30 years. However, its characteristics were not known in the past. In addition, severe winter declines (fruit drop rates as high as 30-70%) rarely developed. Since the liberation, especially since the Great Proletarian Cultural Revolution, mass scientific experiments have been carried out to prove that summer orange (with 2,4-D in winter to prevent fruit dropouts being sprayed in winter) has a high output (up to 300 kg for 20-year-old trees) ), Good quality (more than 8% sugar, acid 1%, acid