Reducing potassium deficiency by using sodium fertilisation  

作　　者：Sarah J.Thorne Frans J.M.Maathuis 

机构地区：[1]Department of Biology,University of Sheffield,Sheffield S102TN,UK [2]Department of Biology,University of York,York YO15DD,UK

出　　处：《Stress Biology》2022年第1期151-160,共10页逆境生物学（英文）

摘　　要：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.

关 键 词：DEFICIENCY FERTILISER NUTRIENT Potassium SALINITY SODIUM 

分 类 号：Q945[生物学—植物学]