甘薯新品种龙薯14号的选育与配套栽培技术研究

甘薯新品种龙薯14号是以浙薯60-2为母本、广薯88-70为父本进行杂交选育而成的优质食用型新品种，2008年和2013年分别通过福建省品种审定和国家品种鉴定。其主要特征特性：鲜薯产量为28.16~43.80 t·hm-2，是对照金山57或广薯87的82.10%~103.90%；薯干产量为8.05~11.30 t·hm-2，是对照的96.50%~109.10%；淀粉产量为5.21~7.51 t·hm-2，是对照种的98.80%~110.83%。薯块干物率、淀粉率分别约为30.00%、19.00%，都高于对照金山57和广薯87，食味评分分别比金山57、广薯87高为3.2分和1.3分，其大部分主要营养成分含量都高于金山57，食味品质很好。高抗蔓割病、中抗薯瘟病，红皮淡黄肉、薯形光滑美观、商品性好。栽培技术要点：密度5.25万~6.00万株·hm-2，全生育期控制在140 d以上，施足基肥、后期注意追肥。

Breeding and Cultivating a New Sweet Potato Variety,Longshu 14

Longshu 14 was a sweet potato variety bred by crossing Zheshu 60-2 and Guangshu 87. It has passed the national registration in 2008 and the provincial registrations in 2013. The fresh yield of the variety was 28.16-43.80 t·hm-2, which was 82.10%-103.90% of that of the reference varieties （CK）, Jinshan 57 or Guangshu 87. Its dry yield was 8.05-11.30 t·hm-2, which was 96.50%-109.10% of that of CK. Its starch production was 5.21-7.51 t·hm-2, which was 98.80%-110.83% of CK＇s. Its tuber dry matter and starch contents were higher than CK, approximately 30% and 19%, respectively. And, most of its major nutrients were in higher concentrations than those in Jinshan 57. This newly bred variety also exhibited a high resistance to fusarium wilt and moderately resistant to bacterial wilt. It had a red skin, yellowish flesh, and appealing appearance, which were considered to be of high commercial value. It was recommended to plant 52 500 to 60 000 plants per hectare, allow a growth period of longer than 140 days, and fertilize normally with an added late stage topdressing.