Effects of Combined Application of Nitrogen,Phosphorus and Potassium Fertilizers on Agronomic Traits and Yield of Sweetpotato
YANG Yufeng
ZHANG Xiaoshen
WANG Huiyu
LI Junxia
DAI Xiaodong
DUAN Junzhi
YANG Guohong
Abstract：Using sweetpotato cv. Shangshu 19 as material,a plot field experiment was conducted to study the effects of different proportions of nitrogen( N) ,phosphorus( P) ,potassium( K) fertilizers on sweetpota-to agronomic traits and yield. The results showed that as far as the length of the vine,number of base bran-ches,stem diameter,aboveground fresh weight and root number of sweetpotato,the NPK4 treatment with N∶P∶K of 1∶1∶2 and N of 75 kg/ha was optimal. The NPK4 treatment obtained the highest fresh root yield of 51 066. 67 kg/ha,which was significantly higher than the other treatments,and the yield signifi-cantly increased by 13. 42% compared to the control without fertilizer. There was significant positive cor-relation between the stem diameter and aboveground fresh weight,significant negative correlation between the number of base branches and length of the vine,and significant positive correlation between the root number and fresh root yield.
Keywords：sweetpotatocombined application of nitrogenphosphorus and potassium fertilizersagro-nomic traitsyield
Publication Date：2015-06-02
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：4( 81-83,89 )