不同肥料及配比对鱼腥草地下茎产量的效应研究

采用4因素5水平二次通用旋转回归试验设计方法,选取硫酸钾、过磷酸钙、尿素、猪粪4个对鱼腥草地下茎产量起关键作用的施肥种类进行量化分析,初步建立了4因素与鱼腥草地下茎产量间的回归模型。对回归模型进行分析发现,4因素对鱼腥草地下茎产量的影响程度依次为:猪粪>硫酸钾>尿素>过磷酸钙。最佳施肥方案:每公顷施尿素604.05~665.40kg,过磷酸钙535.50~700.50kg,硫酸钾453.45~501.75kg,猪粪4840.50~5253.90kg。

Effect of different fertilizers and application rates on subterranean stem weight of Houttuynia cordata Thunb

Potassium sulphate,superphosphate,urea and pig dung are key factors affecting the subterranean stem weight of four Houttuynia cordata Thun.A multi-quadric orthogonal rotational regression design with four factors and five levels was used to quantitively analyze these four fertilizers,and the regression model between the four factors and yield of subterranean stem weight was set up.By the analysis of model,the impact degree of four factors to subterranean stem weight was pig dung at first,then potassium sulphate,urea and superphosphate.The optimum fertilizing program was applying urea 604.05-665.40kg/hm~2,superphosphate 535.50-700.50kg/hm~2,potassium sulphate 453.45-501.75kg/hm~2 and pig dung 4840.50-5253.90kg/hm~2.