Abstract: Vertical and lateral field fertilizing experiments were conducted to investigate the best potassium (K) fertilizer consumption and application of Brassica oleracea var. italica ‘yanxiu’ in Zhangzhou. The results indicated that the different application of potassium had a certain effect on broccoli height, numbers of the functional leveas in seedling stage, plant slump flow, the whole weight (without root) and single head weight that the N fertilizer and P fertilizer were applied at a respective rate of 30 kg/667.7 m2 and 10.0 kg/667.7 m2, the highest yield of broccoli was 1763.5 kg/hm2 with 19.1 kg/667.7 m2 of K fertilizer input; at the same background of N, P fertilizer, the potassium fertilizer was 15.0 kg/667.7 m2 , according to the different proportion of potassium fertilizer as basal manure and top dressing on broccoli, the height, numbers of the seedling functional leveas, plant slump flow, the whole weight, single head weight and the yield index all have some difference, the proportion of basal manure and top dressing was 0.2∶0.8, the production index were higher than other treatments significantly.

Key words: broccoli, potassium fertilizer, optimum amount of fertilization, fertilizer a operations

摘要： 以青花菜品种‘炎秀’Brassica oleracea var．italica ‘yanxiu’为材料，通过设置钾肥横向与纵向施肥的田间试验，探讨青花菜最佳钾肥用量和最佳钾肥运筹。结果表明，在设定氮、磷肥施用量分别为30.0 kg/667.7 m2、10.0 kg/667.7 m2的条件下，钾肥不同施用量对青花菜的株高、苗期功能叶片数、植株扩展度及全株重（去根）、单球重均有一定的影响，当钾肥施用量为19.1 kg/667.7 m2时，其产量最高，为1763.5 kg/hm2；在同样氮、磷肥的背景条件下，钾肥施用量以15.0 kg/667.7 m2，按基肥/追肥不同比例进行施用，青花菜所表现的株高、苗期功能叶片数、植株扩展度及全株重、单球重等形态及产量指标均有所差异，当基肥∶追肥按0.2∶0.8进行施用时，该产量指标均明显高于其它配比的处理。

关键词: 青花菜, 钾肥, 最佳施肥量, 施肥运筹