Due to changes in the ecosystem and misuse of resources, salinity also increases. Approximately 20% of all irrigated land is affected by salinity and this will increase over time. Therefore, it is necessary to develop more environmentally friendly agricultural techniques but also to exploit potential crops with high nutritional value and tolerance to salinity like quinoa (Chenopodium quinoa Willd.). In this context, potassium is an essential macronutrient for plant growth and development. Furthermore, one of the strategies of some salt-tolerant plants is to increase the uptake of potassium under saline conditions such that the K⁺/Na⁺ ratio is maintained for a proper osmotic regulation in cells. Therefore, a study was conducted to investigate the effect of different concentrations of potassium (0.5, 2 and 6 mM K) on quinoa under different salinities (0, 100 and 200 mM NaCl). According to the results, an adequate supply of potassium under moderate salinity conditions benefited the plant growth, with a higher potassium uptake in the presence of salt. Under saline conditions, plant transpiration decreased significantly with a high correlation with stomatal density and a greater water use efficiency. Therefore, under saline conditions, adequate doses of potassium are highly recommended in quinoa cultivation.

中文翻译：

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钾，盐分条件下提高藜（Chenopodium quinoa）水分利用效率和生长参数的重要元素

由于生态系统的变化和资源的滥用，盐度也会增加。大约 20% 的灌溉土地受到盐分的影响，而且随着时间的推移，盐分会增加。因此，有必要开发更环保的农业技术，同时开发具有高营养价值和耐盐性的潜在作物，如藜（Chenopodium quinoa Willd.）。在这种情况下，钾是植物生长和发育必不可少的常量营养素。此外，一些耐盐植物的策略之一是在盐碱条件下增加钾的吸收，使 K ⁺ /Na ⁺在细胞中维持适当的渗透调节。因此，进行了一项研究，以研究不同浓度的钾（0.5、2 和 6 mM K）在不同盐度（0、100 和 200 mM NaCl）下对藜麦的影响。根据结果​​，在中等盐度条件下充足的钾供应有利于植物生长，在盐存在的情况下钾吸收更高。在盐分条件下，植物蒸腾作用显着降低，与气孔密度和水分利用效率高度相关。因此，在盐碱地条件下，藜麦栽培中强烈建议使用足够剂量的钾。