[Influence of fertilizers on yielding capacity and quality of annual onion crops]
2008
Mojsevich, N.V., National Academy of Sciences. Scientific and Practical Center for Potato, Vegetable and Fruit Growing (Belarus). Institute for Vegetable Growing
Results of the investigation of the influence of mineral fertilizers and topdressing with complex water soluble fertilizers Ehkolist Standard, Ehkolist RK-1 and plant growth regulator Novosil on yielding capacity and quality indices of annual onion (Allium cepa) crops grown from seeds in the conditions of the Republic of Belarus were presented. In course of the realized studies it was found out that application of N110P75K110 in combination with topdressing with plant growth regulator Novosil (twice in vegetation period per 100 ml/ha) proved be the most optimal dose of mineral fertilizers for onion cultivation providing the highest yielding capacity (29,1 t/ha) that was on 29,3% higher that the one in the control group, net earning and high economic efficiency level. The highest weight of onion bulbs (70-72 g) were obtained after application of N110P75K110 fertilizers. Realized studies showed that the increasing of doses of the main fertilizer from N70P45K70 up to N110P75K110 caused the increasing of dry matter content in bulbs from 14,6% up to 15,5%. The lowest quality of nitric nitrogen (59,3 mg/kg) was stated after application of N70P45K70 fertilizer doses. Application of topdressings also increased the dry matter content on 0,8-1,0%. Fertilizer elements removal per 10 tones of onions was 47,1-57,1 kg of nitrogen, 12,6-16,6 kg of phosphorous, and 33,3-51,0 of potassium
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