Article

[Study on mathematical model of optimum fertilizer application to Pinellia ternate cultivation].

College of Agriculture, Gansu Agricultural University, Lanzhou 730070, China.
Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica 04/2009; 34(6):669-73. pp.669-73
Source: PubMed

ABSTRACT To study the mathematical model of optimum fertilizer application to Pinellia by field experiments.
Three factors and 5 levels quadratic rotational combination design was applied to study the effects of N, P and K.
N, P and K combination application can achieve the maximum yield of 29,921.4 kg x hm(-2), the amount of N, P2O5, K2O were 413.79, 224.79, 164.01 kg x hm(-2), respectively. The effects of the 3 factors were in following orders: P > N > K.

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Keywords

3 factors
 
5 levels quadratic rotational combination design
 
factors
 
field experiments
 
K combination application
 
optimum fertilizer application