论文部分内容阅读
哈姆林甜橙是美国一百年前从佛罗里达州的实生甜橙中选育而成的。1965年引入我国。湖南省零陵地区是1976年开始试种的,现有面积3817亩。经过十年观察,哈姆林甜橙具有不少优点:树势强,较耐寒。哈姆林甜橙树呈半松散圆头形,八年生树高229.96厘米,冠径258.33厘米,复盖率
The Hamlin Sweet Orange was bred by the United States a hundred years ago from real oranges in Florida. 1965 introduced to our country. The Lingling area in Hunan Province started trial planting in 1976 with an existing area of 3817 mu. After ten years of observation, Hamlin has many advantages of sweet orange: strong tree, more resistant to cold. Hamlin sweet orange tree was semi-loose round-shaped, eight-year-old tree height 229.96 cm, crown diameter 258.33 cm, coverage rate