氮磷钾对四季海棠组培苗生长的影响

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

摘要: 以四季海棠组织培养增殖阶段组培苗为试验材料，采用单因素和正交实验，探究大量元素N、P、K含量对组培苗生长状况的影响。结果表明：N素对四季海棠组培苗的株高、增殖系数和植株鲜质量影响最大；P素对四季海棠组培苗的叶片数、根数和鲜质量有显著影响，但对叶片数影响最大；K素对根数影响最大。四季海棠组培苗增殖阶段，N、P、K元素的最佳配比分别为15、0.8、4 mmol/L，即质量浓度比为3.75∶2∶10。

Abstract: 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.