[Effect of optimized fertilization on spicas biomass and yield of Prunella vulgaris].
OBJECTIVE
To study the effects of nitrogen (N), phosphorus (P2O5), potassium (K2O) and organic compound fertilizer (OF) on spicas biomass and yield of Prunella vulgaris in order to provide a theoretical basis for good agriculture practice (GAP).


METHODS
Field plot experiments with a 4-variable quadratic orthogonal rotation combination design were adopted, and a function model of spicas yield in P. vulgaris was established.


RESULTS
The model analysis showed that spicas yields of P. vulgaris were significantly influenced under the N, P2O5 and K2O applications, among there factors, N had the greatest effects on spicas yield of P. vulgaris, the next was P2O5 and K2O, OF had the smallest effects on spicas yield. At the lower fertility levels, the spicas yields of P. vulgaris were improved along with the increasing of N, P2O5, K2O and OF applications, but the spicas yields decreased when N, P2O5, K2O and OF were applied too much.


CONCLUSIONS
In this experiment condition, the spicas yields of P. vulgaris could reach to 722 kg x hm(-2) when the fertilizer rates were N 303. 9-335.1 kg x hm(-2), P2O5 432.5-500.6 kg x hm(-2), K2O 206.6-240.2 kg x hm(-2), OF 2 312.5-2 687.5 kg x hm(-2).
Institute of Chinese Medicinal Materials, Nanjing Agricultural University, Nanjing 210095, China. gqs@njau.edu.cn
Qiaosheng
Q
Guo
Yuhang
Y
Chen
Li
L
Liu
Chengya
C
Wang
Xianxiu
X
Zhang
D000383:Agriculture / Q000379:methods*; D018533:Biomass; D005308:Fertilizers / Q000032:analysis*; D009584:Nitrogen / Q000032:analysis / Q000378:metabolism; D010758:Phosphorus / Q000032:analysis / Q000378:metabolism; D011188:Potassium / Q000032:analysis / Q000378:metabolism; D031347:Prunella / Q000254:growth & development* / Q000378:metabolism
D005308:Fertilizers; D010758:Phosphorus; D009584:Nitrogen; D011188:Potassium