不同形态钾肥配比对油菜生物量及钾肥利用率的影响

Effect of different forms of potassium fertilizer ratio on rape biomass and potassium nutrient utilization

采用盆栽试验方法,研究了不同形态钾肥配比对油菜生物量及钾肥利用率的影响。结果表明,与对照不施钾处理相比,不同形态的钾肥配比均能显著提高油菜生物量、钾素含量、钾素积累量,且含枸溶性钾的钾硅肥处理效果好于水溶性钾肥处理。油菜总生物量以含25%水溶性钾的钾硅肥处理最高,较对照不施钾处理显著增加66.3%。随着水溶性钾比例的增加,油菜钾素含量、钾素积累量及钾肥利用率有先上升后下降的趋势,在水溶性钾比例为25%和50%时均较高。综合结果表明,含25%～50%水溶性钾的钾硅肥效果较好。

The pot experiments were carried out to study the effects of different forms of potassium fertilizer ratio on rape biomass and nutrient utilization. The results indicated that different forms of potassium fertilizer could significantly improve the biomass,potassium nutrient content and potassium accumulation of rape compared with the contrast treatment without potassium fertilization. The effect of potassium silicon fertilizer containing citrate acid soluble potassium was better than that of water soluble potassium fertilizer The total rape biomass of potassium silicon fertilizer containing 25% water soluble potassium was the highest. It was increased by 663% compared with the contrast treatment without potassium fertilization. The potassium nutrient content,total potassium accumulation and nutrient utilization efficiency of potassium silicon fertilizer were increased and then decreased with the increase of water soluble potassium ratio and they reached the higher when the water soluble potassium were 50% and 25%. Comprehensive results showed that the potassium silicon fertilizer containing 25% to 50% water soluble potassium was better.