Effects of N, P and K on the Growth of Tissue Culture Seedlings of Begonia semperflorens

In this experiment, the tissue culture seedlings of Begonia semperflorens at the propagation stage were used as experimental materials. The effects of plenty of N, P and K on the growth of tissue culture seedlings were investigated by single factor and orthogonal experiments. The results showed that N had the greatest influence on plant height, proliferation coefficient and fresh weight. P had significant effects on leaf number, root number and fresh weigh, with the greatest effect on the number of leaves. K has the greatest influence on the number of roots. The optimal ratios of N, P and K for B. semperflorens tissue culture seedlings at proliferation stage were 15, 0.8 and 4 mmol/L, the mass concentration ratio was 3.75∶2∶10, respectively.