四川省乐山地区五通桥区金山公社红星一队地处乐山县境内,气候温和,年平均温度17.2℃,一月平均温度7.1℃,绝对低温-4.3℃(25年只出现一次,且时间短暂)。年降水量1393.6毫米,适宜柑桔生长。该队科学实验小组,由于受伏令夏橙保果越冬试验的启发,于1977—78年连续两年,进行了锦橙果实留树贮藏试验。供试材料为定植在夏橙园中的两株八年生红桔砧锦橙初结果树。1977、1978年试验树分别留果65—127个。锦橙果实一般在11月下旬至12月中旬成熟采收。为延长采收时期,防止冬季低温引起落呆,达到果实留树贮藏目的,在栽培技术上除加强田间管理,增施农家肥并 Leshan, Wushanqiao District, Leshan, Hebei Province Jinshan commune Red Star is located in Leshan County, a mild climate with an average annual temperature of 17.2 ℃, the average January temperature of 7.1 ℃, absolute low temperature -4.3 ℃ (only occur once in 25 years, and the time is short). Annual rainfall of 1393.6 mm, suitable for citrus growth. The team of science experimental group, due to the summer of summer orange fruit inspirations inspired by test, in 1977-78 for two consecutive years, Jinju orange tree retention test. The materials for the test were two early orange trees of eight-year-old red orange root planted in summer orange garden. 1977, 1978, respectively, the test tree retained fruit 65-127. Orange fruit generally mature from late November to mid-December harvest. In order to extend the harvesting period, to prevent the winter low temperature caused by the fall, to achieve the purpose of fruit trees to stay in the tree, in addition to strengthening the cultivation techniques in field management, increase manure and