设施韭菜幼苗施肥方案优化研究

为确定高质量韭菜幼苗的施肥方案，试验采用饱和D-最优试验设计，研究氮、磷、钾对设施韭菜幼苗质量的影响，并在此基础上，建立以韭菜幼苗质量得分为目标函数，氮、磷、钾编码值为自变量的数学模型。结果表明，合理的氮磷钾配施可以显著提高韭菜幼苗质量，其中钾肥对幼苗质量的影响大于磷肥、氮肥，且磷肥和钾肥之间交互作用显著。同时，通过对模型解析，确定在本研究条件下韭菜幼苗质量综合得分超过90的施肥方案，即N施用量为205.65~304.95 kg/hm2、P2O5为164.10~225.00 kg/hm2、K2O为228.45~328.50 kg/hm2时，才有望获得高质量韭菜幼苗。

Study on Optimization Fertilization Technology of Protected Chinese Chives Seedling

In order to achieve fertilization scheme of Chinese chives seedling with high quality, the effect of nitrogen, phosphorus and potassium on seedling was studied with design of saturated D-optimal regression. And the resulted obtained, a mathematical model was established, in which N and K applied were independent variables, integrated quality value of seedlings was dependent variables. The results showed that the seedling quality was significantly improved with reasonable usage and ratio of N, P and K, Meanwhile the effect of potassium was higher than phosphorus and nitrogen, the interaction of potassium and phosphorus was significant. When N was 205.65-304.95 kg/hm2, P2O5 was 164.10-225.00 kg/hm2, K2O was 228.45-328.50 kg/hm2 under this experimental condition, the fertilizer project with integrated quality value of seedlings over 90 was achieved.