Effect Of Different Nitrogen To Potassium Fertilizer Ratios On Tomato And Strawberry Fruit Growth

This article was aimed to demonstrate the impact of nitrogen to potassium ratios on fruit growth of tomato and strawberry.Pot experiments was carried out with two nitrogen treatments?high nitrogen and low nitrogen dosages?and three ratios of nitrogen to potassium?N/K₂O as 1:1,1:1.6 and 1:2.2?.In addition,to explore the influence of nitrogen and potassium application onthese two cultivars,fertilization treatment of nitrogen or potassium application were also conducted.The fruit growth,yield,quality,nitrogen and potassium contents of fruit and leaf of tomato and strawberry were determined to provide the theoretical basis and technology for the quality production of tomato and strawberry.The results are as follows:?1?Nitrogen and potassium application was beneficial to the formation of tomato yield and quality.In the case of sufficient nitrogen fertilizer,the nitrogen and potassium treatments with sufficient nitrogen fertilizer were higher than those of nitrogen fertilizer.The sufficient nitrogen fertilizer treatment had higher tomato yield.For tomato yield,the optimum treatment was nitrogen fertilizer ratio of 1:1.6,under which the yield of tomato was 1339.69g,mainly due to the fact that the number of fruits of more than 30g was much more,and it was 100%higher than that of non-fertilization.The ratio of nitrogen to potassium was 1:1.6 Potassium had higher yield and number of fruits of more than 30g.Besides,the Vc content of tomato fruit reached a high level when the ratio of nitrogen to potassium was 1:1.6,whether the supply of nitrogen fertilizer was sufficient or not.?2?The application of nitrogen and potassium was advantaged to promote the distribution of nitrogen to fruits and leaves,and the nitrogen content and potassium content of tomato fruits were maintained at a high level under the condition of sufficient nitrogen fertilizer.The content of nitrogen in the fruit was higher than that in the case of nitrogen and potassium ratio of 1:1.6,and the nitrogen content was higher than that in the case of nitrogen and potassium ratio 1:2.2 fertilization.Proportion 1:2.2 is beneficial to leaf potassium content increase.?3?Compared with the non-fertilization treatment at productive phase,the yield and quality of strawberry were increased with different treatments.However,under the same nitrogen application condition,the difference between the treatments was not significant.In the case of sufficient nitrogen fertilizer,the total yield of strawberry treated with 1:1.6 ratio was the highest,and the effect of nitrogen and potassium on the Vc content of fruit was more significant.In the case of different ratio of nitrogen to potassium,the ratio of 1:1.6gained higher fruit Vc content,conducive to improving the quality of strawberry flavor.However,there was no significant difference in the fruit diameter or grow rate of fruit diameter under different nitrogen and potassium treatments with the same amount of nitrogen nutrient application.?4?Nitrogen and potassium fertilizers had different effects on the contents of nitrogen and potassium in strawberry fruit and leaf.The nitrogen content and potassium content of the strawberry fruit were higher under the rate of 1:1.6 fertilization application,within the rate,the nitrogen content in the leaves was increased,and the nitrogen content in the leaves was also increased,Under the same nitrogen fertilizer level,the increase of potassium fertilizer would,increase the leaf potassium content.In conclusion,the nitrogen and potassium ratio of 1:1.6 fertilization was more favorable for the growth,yield and quality of tomato and strawberry,and more likely to obtain the higher nitrogen and potassium contents.