渝薯303扦插密度和施肥量的优化研究  

Studies on Optimum Scheme of Planting Density and Fertilization for a New Sweet Potato Cultivar Yushu 303

作　　者：胡水秀[1] 施翔[1] 方先兰 

机构地区：[1]江西农业大学农学院,江西南昌330045 [2]江西省赣州市农科所,江西赣州341000

出　　处：《江西农业大学学报》2003年第6期848-852,共5页Acta Agriculturae Universitatis Jiangxiensis

摘　　要：采用四元二次正交回归旋转组合设计方法,建立了渝薯303的密度、氮、磷、钾肥四因素的综合效应产量模型,评价了各因素对产量的贡献,其大小顺序为:硫酸钾>密度>尿素>过磷酸钙。通过计算机模拟,筛选出每666.7m2产量3500kg以上的农艺组合方案。The synthetic efficiency model with four factores (X 1:density; X 2:nitrogen; X 3:phosphorus; X 4:potassium) for Yushu 303 was established with rotational design of orthogonal regression of quarternary quadratic form. The agronomic synthetic scheme with which the land produced more than 3 500 kg/666.7m 2 was selected, and the efficiency of every single factor and their interaction for every agronomical practice were analysed by computor simulation. The order of the contributions of the four factores to the yield was: X 4> X 1> X 3> X 2 .

关 键 词：渝薯303 肥料 产量 农艺方案 扦插密度 施肥量 甘薯 

分 类 号：S531[农业科学—作物学]