湘科2号脐橙在湖南省不同地区的生育期及产量表现

湘科2号脐橙是从纽荷尔脐橙芽变中选育出来的椭圆形脐橙新品种.2002～2013年,在石门、澧县、长沙、湘乡、宜章和江华等地对该品种进行区域试验.结果表明,该品种果实均呈椭圆形,果形指数为1.14～1.19,果形一致;单株产量较高,最高可达38.60 kg/株,丰产潜力大;且在不同区域和不同年份,遗传性状表现稳定.该品种始花期在湘南（宜章、江华）比湘中（长沙、湘乡）早8d左右,比湘北（石门、澧县）早15d左右,抽梢期在湘南比湘中早6～11d,比湘北早7～16 d;果实成熟期均在11月中下旬.

Growth and Yield of Navel Orange Varoety Xiangke 2 in Different Regions of Hunan

Xiangke 2 is a new navel orange cultivar with ellipsoid-shaped, which was selected from bud mutation of Newhall. From 2002 to 2013, regional trials was conducted in Shimen, Lixian ,Changsha, Xiangxiang, Yizhang and Jianghua to study the growth period and yield of Xiangke 2 navel orange in different regions. The results indicated that the fruit of Xiangke 2 cultivar had all ellipsoid fruit shape,with high yield, good quality and stable genetic traits even in different regions and years. First -flowering dates of this variety in Southern Hunan occurred about 8 d earlier than Central Hunan, and about 15 days earlier than Northern Hunan; the heading date of Xiangke 2 in Southern Hunan came 6-11 d earlier than Central Hunan; fi-uit matured in mid-to-late November in all regions.