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钾素是作物所需主要营养之一。甜菜对钾素的需要量颇大,比谷类作物多三倍。黑龙江省土壤潜在肥力很高,土壤中钾素含量丰富(1—5％)。但受自然条件影响,以及随氮磷化肥用量不断增加,施用钾素显得更为重要。我所1977年到1980年试验结果表明,士壤中有效钾在一般水平下,施钾肥对甜菜块根增产显著,根中含糖提高,促进幼苗生长,并能提高甜菜抗根腐病能力。
Potassium is one of the major nutrients required for crops. Beet needs a lot of potassium, about three times more than cereals. Potential soil fertility is high in Heilongjiang Province, with abundant potassium (1-5%) in the soil. However, due to natural conditions, and with the increasing use of nitrogen and phosphorus fertilizer, the application of potassium is even more important. From 1977 to 1980, the results of our experiment from 1977 to 1980 showed that the available potassium in lettuce soil was increased under normal conditions by applying potassium fertilizer to root tuber of sugar beet, the sugar content in root was increased, the seedling growth was promoted, and the ability of sugar beet to resist root rot was improved.