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田间试验表明,在灰钙土地上,氮、磷、钾肥配合施用,有利于甜菜块根对养分的平衡吸收和积累,从而获得较高的块根产量和产糖量.在三要素中,氮肥对甜菜块根有明显的增产效果,且随施氮量增加增产愈显著;块根产量与磷肥用量相关性不明显且不稳定;钾肥对块根增产不够明显,但能提高块根含糖量.甜菜生育期中对氮、磷的吸收,至叶丛期即渐达高峰,对钾的吸收至糖分积累期才渐达高峰,故栽培上氮磷肥宜早施,钾肥可适当晚施.
Field experiments showed that the application of nitrogen, phosphorus and potassium fertilizers in the calcareous soil was beneficial to the balanced absorption and accumulation of nutrient in root tuber of beet, resulting in higher tuber yield and sugar yield.In the three factors, The yield of root tuber was significantly increased, and the yield was more significant with the increase of nitrogen application rate. The correlation between tuber yield and the amount of phosphate fertilizer was not obvious and unstable. Potassium fertilizer did not increase the yield of tuberous root obviously but increased the sugar content of root tuber. , Phosphorus uptake to the leaf bundle that reached the peak, the absorption of potassium until the accumulation of sugar only gradually reached its peak, so the cultivation of nitrogen and phosphorus should be applied early, potassium can be applied late.