The relationship of Artemisia annua seed yield with density, N, P and K fertilizer applied amount was studied, and a mathematical model involving the 4 factors affecting seed yield was established using the orthogonal rotation design of quadratic regression. The seed yield function model was established according to parameters through field tests and data treated by computer techniques. The best agronomic measures complex project was selected and developed by computer imitation. The effects on seed yield of A. annua are density > N > P > K in turn. To obtain the highest yield density should be 13 000-15 000 plants x hm(-2), Ureal 186-242 kg x hm(-2), calcium superphosphate 874-1 023 kg x hm(-2), potassium chloride 135-165 kg x hm(-2) in the experiment. Reasonable planting density and fertilizer application could improve the seed yield of A. annua.
Agriculture ; methods ; Artemisia annua ; chemistry ; growth & development ; Biomass ; Fertilizers ; analysis ; Models, Biological ; Models, Theoretical ; Seeds ; chemistry ; growth & development