[Study on balanced application of NPK fertilizer on growth of Paeonia lactiflora with orthogonal design].
OBJECTIVE
To study the level of NPK balanced fertilization on growth of Paeonia lactiflora in different growing periods.


METHODS
This experiment was designed as orthogonal test of three factors and three levels. Fresh weight of root, number of bud, number of root division, length of the longest root and diameter of widest root were used as indicators.


RESULTS
Nitrogenous, phoshate and potash fertilizer affected the growth of the Paeonia lactiflora from the first to the third year. And the nitrogenous was the main factor during the fourth year.


CONCLUSIONS
NPK fertilizer, especially N and P fertilizer are needed during the first year of the Paeonia lactiflora. Only the nitrogenous fertilizer is needed in the fourth year.
Chen
Xuan
X
College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China. chenxuan@njau.edu.cn
Wang
Kang-Cai
KC
Wu
Mei-Li
ML
Hang
Yue-Yu
YY
Zhou
Yi-Feng
YF
D018533:Biomass; D005308:Fertilizers; D009584:Nitrogen; D029596:Paeonia / Q000254:growth & development*; D010758:Phosphorus; D018517:Plant Roots / Q000254:growth & development; D010946:Plants, Medicinal / Q000254:growth & development*; D011188:Potassium; D013997:Time Factors
D005308:Fertilizers; D010758:Phosphorus; D009584:Nitrogen; D011188:Potassium