Reducing potassium deficiency by using sodium fertilisation.
Reducing potassium deficiency by using sodium fertilisation.
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DOI：
10.1007/s44154-022-00070-1
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发表时间：
2022-11-02
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钾是绝大多数植物体内含量最丰富的阳离子。它的需求量很大，在农艺背景下，通常需要以钾肥或其他钾肥的形式施用钾肥。近年来，钾肥价格大幅上涨，全球土壤缺钾现象也日益严重。这个问题的一个潜在解决方案是减少对作物钾肥的依赖，用价格低得多的钠(Na)化肥取代它。本文讨论了钾和钠的生理作用以及钠肥在作物栽培和土壤管理中的意义。通过温室生长试验，我们发现在小麦、番茄、油籽和高粱上施钠肥后有明显的生长促进作用。我们的结果还表明，高达60%的组织钾可以被钠替代，而不会影响生长。基于这些数据，简单的经济模型表明，(部分)用钠肥替代钾肥会带来相当大的节省。
Potassium (K) is the most abundant cation in the vast majority of plants. It is required in large quantities which, in an agronomic context, typically necessitates application of K in the form of potash or other K fertilisers. Recently, the price of K fertiliser has risen dramatically, a situation that is paralleled by increasing K deficiency of soils around the globe. A potential solution to this problem is to reduce crop K fertiliser dependency by replacing it with sodium (Na) fertiliser which carries a much smaller price tag. In this paper we discuss the physiological roles of K and Na and the implications of Na fertilisation for crop cultivation and soil management. By using greenhouse growth assays we show distinct growth promotion after Na fertilisation in wheat, tomato, oilseed and sorghum. Our results also show that up to 60% of tissue K can be substituted by Na without growth penalty. Based on these data, simple economic models suggest that (part) replacement of K fertiliser with Na fertiliser leads to considerable savings.