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在不同氮水平下钾营养对大棚无土栽培番茄产量及品质的影响结果表明：适当提高钾肥浓度，可提高番茄坐果率、产量，以及果实中Ｖｃ含量、可溶性糖和有机酸含量，并且果实硝酸盐含量和筋腐果发生率明显降低。但钾肥浓度过高，会使番茄产量、品质降低。氮钾配施十分重要，本试验以Ｎ_２Ｋ_３（Ｎ为 ２５０ｕｇ·ｇ~－１， Ｋ_２Ｏ为 ７６０ｕｇ·ｇ~－１）为最佳处理。
Effects of potassium nutrition on yield and quality of tomato cultivated in soilless greenhouse under different nitrogen levelsThe results showed that: Appropriate increase of potassium concentration can increase tomato fruit setting rate, yield, Vc content, soluble sugar and organic acid content in fruit, Salt content and the incidence of barred fruit decreased significantly. However, the high concentration of potash will reduce tomato yield and quality. The combination of N and K is very important. In this experiment, N 2 K 3 (N 250ug · g -1, K 2 O 760ug · g -1) was the best treatment.