江西农业学报Issue(1)：1-5,5.
宁紫薯2号的选育及栽培生理研究
Breeding and Study on Cultivation Physiology of Sweetpotato Variety Ningzishu No.2
摘要
Abstract
A new purple-fleshed sweetpotato variety Ningzishu No.2 was developed from the progeny of a cross Ayamurasaki ×Chuanshu 69.It was identified by the National Sweetpotato New Varieties Appraisal Committee in 2012.In order to find out the characteristics and high yielding physiology of Ningzishu No.2, the method of multi-identification and investigation on plant in different growth stages were used respectively.High yield cultivation techniques were studied by different fertilizer treatments on Ningzishu No.2.Multi-identification showed that the average fresh root and dry matter yield of Ningzishu No.2 were 22968.0 kg/hm2 and 6597.5 kg/hm2 , and higher than that of control variety Ningzishu No.1, which increased by 13.22%and 32.22%, re-spectively.Ningzishu No.2 was middle resistant to stem nematode, black rot and fusarium wilt, its dry matter content was 28.75%, and anthocyanin content was 28.16 mg/100 g flesh root.The results of physiology characters demonstrated that the aver-age leaf area index of Ningzishu No.2 during the whole growth period was 2.81, higher 10.2%than that of control variety Ningz-ishu No.1.The study on cultivation technology indicated that fertilizer had significant effect on the fresh root yield, vine yield, bi-ology yield and dry matter yield of Ningzishu No.2.The fresh root yield was affected not only by amount of N, P and K, but also by proportion of N, P and K, The K plays a dominant role.The highest root yield had been obtained when 180 kg/hm2 K2 O, and N∶P2O5∶K2O =1.5∶1∶2.4 were applied in this experiment.关键词
甘薯/品种/高产生理/栽培技术Key words
Sweetpotato/Variety/High yield physiology/Cultivation technology分类
农业科技引用本文复制引用
谢一芝,郭小丁,马佩勇,贾赵东,边小峰,苏兴智,王维屯..宁紫薯2号的选育及栽培生理研究[J].江西农业学报,2016,(1):1-5,5.基金项目
现代农业产业技术体系建设专项资金（ CARS－11－C－03）；江苏省科技支撑计划项目（BE 2014315）；江苏省农业科技自主创新基金［ CX（14）2005］资助。 （）
