Effect of magnesium sulfate fertilizer application strategy on the yield and quality of processed tomato
[Objective]To study the effects of magnesium fertilizer application times and distribution ratio on the yield and quality of processed tomatoes under calcareous soil conditions and screen the suitable magnesi-um fertilizer application scheme.[Methods]The field experiment was carried out with Jinfan 3166 and mag-nesium sulfate as experimental materials,and four treatments were set up:(1)3 times of fertilization+front weight(50%magnesium sulfate was applied at seedling stage,DS3O);(2)3 times of fertilization+post weight(50%magnesium sulfate was applied at the swelling stage,DS3E);(3)6 times of fertilization+front weight(DS6O);(4)6 times of fertilization+post weight(DS6E).[Results]The stem diameter,chlorophyll content and dry matter accumulation of processed tomatoes were significantly increased by increas-ing the number of times of magnesium fertilizer drip application(6 times)and the high proportion of magnesi-um fertilizer application in the later stage("post weight").At the same time,the greater the dosage of mag-nesium fertilizer(the larger the distribution ratio of magnesium fertilizer),the higher the nitrogen and magne-sium content in the processed tomato fruit and the lower the calcium content.The yield and quality of pro-cessed tomatoes were significantly increased when the times of magnesium fertilizer drip application and the proportion of magnesium fertilizer late application were high("post weight")[Conclusion]The highest yield and the best quality of processed tomatoes are obtained when the amount of magnesium sulfate is 450 kg/hm2,6 times of drip application and the distribution ratio is post-weight(DS6E).
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