钾肥品种与用量对黄瓜养分吸收和分配的影响

在大棚栽培条件下,研究了不同钾肥品种与用量对黄瓜养分吸收和分配的影响.结果表明:钾肥可明显提高黄瓜含钾量,而降低其他大、中量元素含量,钾-钙和钾-镁拮抗作用明显;施用氯化钾提高黄瓜组织含钾量的效果优于硫酸钾.低量钾肥可提高黄瓜养分吸收量,继续增施钾肥可明显降低养分元素吸收量.硫酸钾有利于果实养分分配比例的提高,而氯化钾有利于营养体养分分配比例的提高.钾肥品种与用量对黄瓜养分吸收和分配的影响与产量和品质呈密切相关.

Effects of Different Sources and Rates of K on the Nutrient Uptake and Partition of Cucumber

The field trial was conducted for studying the effects of different sources and rates of K on the nutrient uptakes and distributions of the cucumber (Cucumus sativus L.) under the condition of greenhouse cultivation. The results indicated that potassium increased the K content in cucumber and the effect of using MOP was better than that of SOP. However,K fertilizer inclined to reduce other nutrient content because obvious antagonism existed between K-Ca, K-Mg. Low rate of K could increase nutrient uptake but additional application of K could obviously reduce the content in cucumber.SOP was favorable to the nutrient partitions in fruits of cucumber,while MOP in favor of vegetative tissues. The effects of different sources and rates of K on the nutrient uptake and partition of the cucumber were closely correlated with the yield and quality.