施肥量对甜菜产量和质量的影响

Effects of Fertilization on Yield and Quality of Sugarbeet

采用"3414"最优回归设计方法,对甜菜氮磷钾肥料合理配施进行研究。结果表明,氮磷钾配合施用显著提高了甜菜产量,三因素增产大小顺序为N>P>K。本试验条件下,N、P2O5和K2O最大施用量分别为198.51kg/hm2、115.97kg/hm2和103.63kg/hm2,三要素比例为1∶0.584∶0.522时,甜菜块根产量最高为65 005.59kg/hm2。在同等肥力下,含糖率随着施氮量的增加而下降,随着磷肥的增加而升高,钾肥对含糖率影响不大。

Effects of N,P and K application on sugarbeet were studied by the means of field experiments with ＂3414＂ best regression design.The results showed that the coordinated application of nitrogen,phosphorous and potassium increased the yield of sugarbeet significantly,with the order of importance being NKP.The best NPKapplication with maximum economical yield of 65 005.59kg/hm2 was 198.51kg/hm2 of N,115.97kg/hm2 of P2O5 and 103.63kg/hm2 of K2O.The sugar content decreases with the amount of nitrogen increasing,or it increased with the amount of phosphorus increasing,but potassium had little effect on the sugar content.