Effects of Different Types of Potassium Fertilizers on Sugar Beet Yield and Soil Characteristics
[Objective]Identifying the appropriate types of potassium fertilizer for local sugar beet production according to the current level of sugar beet productivity.[Methods]Taking the commonly grown sugar beet variety'IM1162'as the research object,different amount of potassium chloride and potassium sulfate were applied to compare the effect of potassium sulfate and potassium chloride on the growth and development of sugar beets and soil characteristics in field plot experiments.[Results]The application of potassium sulfate and potassium chloride could both increase sugar beet yield and sugar content.Among them,potassium sulfate(K2 O:180 kg/hm2)and potassium chloride(K2 O:180 kg/hm2)treatments increased sugar beet yield by 3.45%and 3.69%,respectively,compared to the control group,and the sugar content increased by 2.43 and 1.25 percentage points respectively compared to the control,but the application of potassium chloride did not significantly effect on the increase of sugar content;Compared to the application of potassium sulfate,the application of potassium chloride fertilizer could lead to a decrease in soil pH below 7.0,an increase in ion conductivity by 3.18%-8.92%,and had a potential risk of inhibiting sugar beet uptake of nitrogen and phosphorus.[Conclusion]The results indicate that the suitable type of potassium fertilizer for sugar beet application is potassium sulfate.
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