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在宁夏惠农区通过田间小区试验研究了不同供钾水平对芹菜产量、品质和经济效益的影响。结果表明:增施钾肥有显著的增产作用,与对照比较各处理增产率在11.4%~19.1%之间;钾肥利用率随着施钾量的增加而降低,各处理在41.1%~53.9%之间,以施K量75 kg/hm2处理钾肥利用率最高。施钾量在225kg/hm2范围内,增施钾肥均可以提高芹菜的vC含量;施钾均可降低芹菜硝酸盐的浓度,各处理分别比对照降低了16.2%、45.9%、18.9%、13.5%。扣除肥料投入成本,K150处理增收额和纯收入均为最高,分别是9700元/hm2和6800元/hm2。综合考虑芹菜的产量品质因素,当地芹菜合理的施钾量应为150 kg/hm2。
In the Ningxia Hui Autonomous Region, field trials were conducted to study the effects of different potassium levels on the yield, quality and economic benefits of celery. The results showed that the increase of K application rate was significant, and the increase rate of yield was between 11.4% and 19.1% compared with the control. Potassium utilization rate decreased with the increase of K application rate, and the rates of treatment increased from 41.1% to 53.9% Between the K application rate of 75 kg / hm2 treatment of potassium utilization was the highest. Potassium application rate was 225kg / hm2, and increasing potassium fertilizer could increase the vC content of celery. Applying potassium could reduce the concentration of nitrate in celery, the treatments were reduced by 16.2%, 45.9%, 18.9% and 13.5% . Excluding fertilizer input costs, K150 processing revenue and net income are the highest, respectively, 9700 yuan / hm2 and 6800 yuan / hm2. Considering the yield and quality of celery, the reasonable amount of potassium applied by local celery should be 150 kg / hm2.