Влияние различных систем удобрений сахарной свеклы на формирование ее ассимиляционного аппарата
2011
Volosach, O.N. | Novitskaya, L.I. | Galaj, D.V., Grodno State Agrarian Univ. (Belarus)
In the conditions of the Republic of Belarus in course of the single-factor field experiment there was studied the influence of various fertilizer systems of sugar beet (Beta vulgaris var. saccharifera) on the process of formation of its assimilatory apparatus. Application of mineral fertilizers on the background of 600 ton/ha of manure made it possible to considerably increase the leaf area. In the conditions of application of phosphoric and potash fertilizers during vegetation period of sugar beet there was an increasing of index of leaf area on 0,17-1,45. Application of nitric fertilizers in addition to phosphoric and potash ones led to increasing of the latter index additionally on 0,86-3,91. Application nitric additional fertilizing rendered substantial influence on the leaf area. Thus, partial fertilizing of nitrogenous fertilizers by application of additional repeated additional fertilizing in doses of 30 kg of active substance /ha at the development phases of 2-4 and 8-10 true sugar beet leaves made it possible to increase leaf area index in average over the vegetation on 12,0-15,4% in comparison with application of the whole nitrogen dose on a nonrecurring basis before sowing.
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