甜菜高产高糖平衡施肥模式

Balance Fertilization Model of High Yield and High Sugar Content in Sugarbeet

采用3因素5水平正交旋转回归设计的方法,选取氮(x1)、磷(x2)、钾(x3)3个因素为决策变量,以甜菜根产量、含糖率、产糖量为目标函数,通过田间试验获得的数据,建立3个目标函数与参试因子间的数学模型。结果表明,氮在提高根产量、磷在提高产糖量中占有重要地位,磷和氮、钾的交互效应对含糖率有着重要的负作用。通过对氮、磷、钾各水平下,目标函数变化影响的分析,确立了根产量达到44t/hm、含糖率达到17%、产糖量达到27.5t/hm^2以上的施肥方案。

The positive rotation regress design of three factors with five levels was adopted, the three factors (nitrogen, phosphate, potassium) as the decisive variable, the root yield, the sugar content, the sugar yield of sugarbeet as the target function, and the mathematical model was established from the three the target function and factor joined in test according to the data obtained through the field tests,. The results showed that it is important for nitrogen to increase root yield and for phosphate to raise sugar yield, and there was a significant positive interaction to sugar content between phosphate and nitrogen, phosphate and potassium. The applying fertilization model for root yield(44t/ha), sugar content(17%)and sugar yield(7.5t/ha) was obtained from the analysis of the influence of target function change under the different levels of nitrogen, phosphate and potassium.