Effects of potassium on potassium efficiency,yield and pigment contents of sweetpotato
(0) The effects of Dotassium(K)nutrition on K efficiency,storage root yield and pigment contents of sweetpotato were studied.84 cultivars were screened to find out cultivars having high pigment contents as well as high K efficiency in terms of yield production under low K supply(35mg/kg soil).Genotypes Zhe 3481,Zhe 6025 and Zhe 7512 were selected for their high carotene content.The cultivar Zheda9201 was selected for high anthocyanin content.The selected genotypes were further tested at two K fertilizer levels i.e.Ko(0 kg/ha K2SO4)and K1(270kg/ha K2SO4).It was found that K application increased both the yield and pigment content of storage roots of sweetpotato.Furthermore,an investigation into the optimal K fertilization level in terms of yield and pigment content of genotypes Zheda 9201(purple flesh),Zhe3481(orange flesh)and Xushul8(white flesh；as control genotype)were tested at different K fertilizer application levels i.e.K0,K150,K300,K450,and K600(kg/ha).Of the tested doses of K,the application of K300 produced the highest yield(8.99 s/ha),RKER(70.61 g DW g K-1)and pigment of storage roots were 13.60 mg.100g-1 carotene and 12.45 mg/.100g anthocyanin respectively.In addition,deeper the color,the higher the pigment content of the storage roots of sweetpotatoes.The higher yield and concentration of pigments in sweetpotato can lead to a higher pigment accumulation or higher total pigment production those results to higher profits.
Potassium K nutrient efficiency Sweetpotato Pigment content(carotene anthocyanin)
Guoquan Lu Wenjing Zhao Shenyan Yi
Department of Agronomy,College of Agriculture and Biotechnology,Zhejiang University,Hangzhou310029,China
国际会议
3rd China-Japan-Korea Workshop on Sweetpotato(第三届中日韩甘薯学术研讨会)
北京
英文
136-142
2008-10-12（万方平台首次上网日期，不代表论文的发表时间）