不同栽培措施对华大麦6号产量和净收益的模型研究

为大面积推广高产优质啤酒大麦新品种华大麦6号,本试验以五元二次回归正交旋转组合设计为基本数学模型,重点研究华中地区种植密度、有机肥、氮、磷、钾肥用量等因素对华大麦6号产量、粒重和净收益的综合效应。对模型解析发现,在供试条件下密度、有机肥、氮、磷、钾肥单因子对产量绝对贡献顺序为氮肥>有机肥>磷肥>密度>钾肥;对千粒重的绝对贡献顺序为磷肥>钾肥>有机肥>密度>氮肥;对净收益的贡献顺序为有机肥>氮肥>磷肥>密度>钾肥。计算机模拟寻优表明,密度在199.8～213.9万株hm-2,有机肥在17428.5～20330.1kghm-2,氮肥在202.4～228.3kghm-2,磷肥在73.3～86.0kghm-2,钾肥在66.2～82.8kghm-2。时,大麦的产量在4800kghm-2以上,千粒重>42g,净收益达5500元hm-2。因此,这些栽培措施的组合可以作为推荐的高产高效栽培技术方案。

Effects of Different Cultivation Measures on Yield and Net Income of Cultivar HuaDa Barley 6

The second-order regression models for Huada barley 6, a new cultivar with high yielding and desirable quality, were constructed with the data set from a sequential experiment based on the principle of orthogonal, rotatable and central composite design. Three models for yield, thousand grain weight and net income were obtained respectively with the same five operating variables, i.e. density, organic fertilizer, nitrogen, phosphorus, and potassium. The absolute contribution to yield in terms of thousand grains weight and net income is in the order: nitrogen > organic fertilizer > phosphorus >density > potassium, , but that for net benefit is in the order: phosphorus >potassium >organic fertilizer > density >nitrogen and organic fertilizer > nitrogen >phosphorus >density >potassium, respectively.