摘要
试验表明,甜菜是需钾量大的作物,吨甜菜块根需钾量约是氮、磷量的1.45、3.18倍,且吸收阶段长。适宜用量为10kg/亩;施钾可提高根中含糖率0.2～0.6度,但其对含糖率的影响受氮肥制约,N与K_2O的适宜配比为1:3;施钾可降低根中α—N含量,K、Na含量略有增加,但统计表明与未施钾处理比差异未达显著水平;此外,钾素还可增强甜菜植株的耐热、抗涝性。
The experiments have shown that sugarbeet crop required large amount of potash, the amount of potash needed about 1.45 and 3.18times to N and P by per ton root and the uptaking time is longer, the optimum rate is 10kg/mu, the sugar content of root increased 0.2%-0.6% with potash application. Its effect on the sugar content is restricted by N fertilizer, the optimum rate of N: K2O is 1:3, content
of α-N in root could decreased with the potash used. Content of K, Na increased little, but they have no significance when it compared with no potash, in addition, the sugarbeet tolerant to heat and water logging resistance can be enhanced.
关键词
钾肥
甜菜
品质
抗逆性
施肥
Potash fertilizer, Sugarbeet Quality, Adversity resistance
