2001•Unpublished venueRequires access
Studies on Mathematical Models of Recommended Fertilization of Nitrogen,Phosphorus and Potassium For Spring Maize of Paddy Field in Southern China.
He Xi
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Abstract
Mathematical models of recommended fertilization of nitrogen,phosphorus and potassium for spring maize of paddy field were set up by means of rotational combinatorial design and computer technology.The relations between the yield and the main effect and interaction of nitrogen,phosphorus and potassium have been analyzed.Their effect to the yield is arranged from big to small:Nitrogen fertilizer,phosphorus fertilizer and potassium fertilizer.The best plan of maize's yield≥8 250 Kg/hm 2 is:nitrogen fertilizer(pure N)is between 394.65～400.88 kg/hm 2,phosphorus fertilizer(P 2O 5)is between 116.99～121.8 kg/hm 2,potassium fertilizer(K 2O)is between 232.29～237.06 kg/hm 2,and N:P 2O 5:K 2O=3.4:1:2.The best plan of maize's profit≥6800 yuan/hm 2 is:nitrogen fertilizer(pure N)is between 380.60～385.55 kg/hm 2,phosphorus fertilizer(P 2O 5)is between 104.73～108.03kg/hm 2,potassium fertilizer(K 2O)is between.222.20～225.12 kg/hm 2,and N:P 2O 5:K 2O=3.6:1:2.1.