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采用田间试验研究了不同钾水平对白菜产量、养分吸收量和钾肥利用效率的影响。结果表明,不同钾水平(K1、K2和K3)均能显著提高白菜产量,增产率为5.5%~12.8%;不同钾水平处理白菜全钾吸收量均显著提高,增幅为16.2%~30.3%;不同钾水平处理钾肥偏生产力、钾肥农学效率和钾肥利用率随施钾量的增加显著降低,均以K1处理最大,K2次之。本试验条件下,白菜产量、养分吸收量和钾肥利用效率均较优的处理为K2(300-90-150)处理。
Field experiments were conducted to study the effects of different potassium levels on cabbage yield, nutrient uptake and potassium use efficiency. The results showed that different levels of potassium (K1, K2 and K3) could significantly increase the yield of cabbage, with the yield increasing 5.5% ~ 12.8%. The total potassium uptake of cabbage increased significantly from 16.2% to 30.3% with different potassium levels. Potassium biotransplanting productivity, potassium agronomic efficiency and potash fertilizer utilization rate decreased significantly with the increase of K application rate, and K1 treatment was the largest and K2 times later. Under the experimental conditions, the treatment of cabbage yield, nutrient uptake and potassium utilization efficiency are both superior to K2 (300-90-150).