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凡施用硫酸钾都增加了蔬菜和水果的维生素Ｃ、可溶性固形物、糖分和淀粉，减少了有害的硝酸盐。施用钾肥的菜豆、豌豆功能叶的脂酶、蛋白酶的差异十分明显。根瘤固氮酶活性也明显高於不施钾的。施钾马铃薯块茎中过氧化氢酶明显高于不施钾处理。施钾豌豆和菜豆花粉发育正常，而不施钾花粉粒出现畸形。在干旱年份或恶劣气候条件下，由于施钾能降低质膜透性，施钾株气孔开闭灵敏，当干旱时较快关闭。施钾株干旱时气孔阻力高，施钾株豆叶束缚水含量高，粘性就越大，从而增加了耐高温抗旱的能力，施钾作物的细胞渗透压均比不施钾高，使原生质不易失去水分，提高了抗逆性
Where potassium sulfate is used to increase the vegetables and fruits of vitamin C, soluble solids, sugar and starch, reducing the harmful nitrate. Potash application of beans, pea functional leaf lipase, protease differences are obvious. Nodule nitrogenase activity was also significantly higher than that of potassium-free. The potassium catalase in potassium potatoes was significantly higher than that in the non-potassium treatment. Potassium and peas applied pollen normal development, but not the application of potassium pollen grains deformity. Under drought or severe climatic conditions, K-fertilizer stomatal opening and closing were sensitive due to potassium application, and close faster when drought. The stomatal resistance of K-fertilizer plants was high during drought, and the bound water content of K-soya plants was higher and the viscosity was higher, which increased the capability of high temperature and drought resistance. The cell osmotic pressure of K-fertilizer plants was higher than that of K-fertilization and the protoplasm was not easy. Loss of water, increased resistance