Effects of Different Nitrogen Application Rates on Growth and Yield of Sweet Potato
Fan Jianzhi
Jing Shuihua
Duan Chengding
Wang Chunlan
Huang Chengxing
Abstract：Using the sweet potato variety Shangshu 19 as material,under the medium soil fertility condi-tion,five nitrogen levels (0,2.5,5.0,7.5,10.0 kg per 666.7m2 )were set to study their effects on fresh tuber yield,dry yield and nitrogen use efficiency.The results showed that with the increase of nitrogen application rate,the equilibrium point of aboveground and underground growth had a delayed trend,and the fresh tuber yield increased first and then decreased.The treatment of 2.5 kg nitrogen per 666.7m2 had the highest fresh tu-ber yield and nitrogen agronomic efficiency,and the yield increased by 9.46% compared with the control.
Keywords：Nitrogen application rateSweet potatoYield
Publication Date：2015-01-01
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：3( 67-69 )