Zijian Zhao

Sep 18, 2023 | mdpi.com | Xinyue Wu |Zijian Zhao |Zirun Zhao |Youjun Zhang

1. IntroductionPotassium is one of the most important plant nutrients and is essential for plant growth, metabolism, and development [1,2]. Potassium is the most abundant cation in living plant cells and plays an important role in osmotic adjustment, protein synthesis, membrane polarization control, carbohydrate metabolism, and enzyme activation [3,4,5,6]. From the perspective of plant nutrition, potassium can be divided into mineral potassium, slowly available potassium, and available potassium.