论文部分内容阅读
通过田间试验,采用氮、磷、钾三因素二次饱和D-最优设计施肥方案,于收获期计算黄芩产量和根中黄芩苷含量,建立以氮、磷、钾施用量为自变量,黄芩产量和根中黄芩苷含量为目标函数的三元二次多项式数学模型,通过对模型进行解析、寻优获得最适施肥量.结果表明:氮、磷对黄芩产量有显著影响,在低水平施肥条件下,产量随施肥量的增加而增大,一定范围后,增效不明显;氮、磷、钾对黄芩苷含量均有显著影响,黄芩苷含量随氮、钾施用量增加呈先降低再增高的趋势,在低水平施磷条件下,黄芩苷含量随磷肥施用量增加而增加,最终趋于稳定.氮磷、氮钾、磷钾对黄芩产量和黄芩苷含量存在明显的交互作用.本试验条件下,黄芩产量超过4000kg.hm-2、根中黄芩苷含量14%以上的施肥方案为氮(N)90.5～104.7kg.hm-2、磷(P2O5)163.9～199.9kg.hm-2、钾(K2O)84.1～140.8kg.hm-2,比例约为1:1.86:1.15.
Through field experiments, nitrogen, phosphorus and potassium three-factor secondary saturation D-optimal design and fertilization program were used to calculate the yield of Scutellaria baicalensis Georgi and the content of baicalin in root at the harvesting stage. Nitrogen, phosphorus and potassium were used as independent variables, Yield and baicalin content in root as the objective function of the quadratic polynomial mathematical model, through the analysis of the model, the optimum amount of fertilizer to find the optimal results show that: nitrogen and phosphorus have a significant impact on the production of Scutellariae Scutellariae Yield, Under the conditions, the yield increased with the increase of the amount of fertilizer, and the efficiency was not obvious after a certain range. Nitrogen, phosphorus and potassium had significant effects on the content of baicalin. The content of baicalin decreased first and then decreased with the increase of nitrogen and potassium Under the condition of low phosphorus application, the content of baicalin increased with the increase of the amount of phosphate fertilizer, finally stabilized .Nitrogen, phosphorus, potassium and phosphorus had significant interaction on the yield and the content of baicalin. Under the experimental conditions, the yield of Scutellaria baicalensis exceeded 4000kg.hm-2, and the fertilization program with more than 14% of baicalin in roots was nitrogen (N) 90.5 ~ 104.7kg.hm-2, P2O5 163.9 ~ 199.9kg.hm-2 , Potassium (K2O) 84.1 ~ 140.8kg.hm-2, the ratio is about 1: 1.86: 1.1 5.