Influence of some meteorological factors on fertilizer use efficiency in winter wheat growing
2004; De Gruyter Open; Volume: 18; Issue: 3 Linguagem: Inglês
ISSN
2300-8725
Autores Tópico(s)Crop Yield and Soil Fertility
ResumoAfield experiment with winter wheat (Triticum aestivum) on Orthic Luvisol was conducted for a period of eleven years. This study gives the ground to establish correctly the fertilizer rates, especially nitrogen, in accordance with the moisture conditions of the year. Winter precipitation (October-March) plays an especially important role because of the fact that it coincides with the timing of early spring dressing and gives opportunity for more precise determination of the nitrogen fertilizer rates. It was established that application of nitrogen at 120 kg ha -1 was unprofitable when autumn-winter precipitation sums were below 250 mm. Nitrogen fertilizer rates of 180 kg ha -1 could be used only In the complex experimental station - Targovishte, a field experiment with soft winter wheat after grain maize has been conducted for 11 years. The experimental station is located in the Eastern part of the middle climatic region of the Danube plain in the moderate climatic subregion (Ludogorie), at an altitude of 224 m a.s.l. on dark-grey forest soil (Orthic Luvisol in FAO classification, FAO, 1997). Two highly productive cultivars -Sadovo-1 and Pliska - were used in the experiment. The trials were set up in accordance with the block method, in four replications, with an experimental area of 20 m 2 . Four different nitrogen fertilizer rates (0, 60, 120, 180) and P2O5 (0, 40, 80, 120) kg ha -1 on background of 120 kg ha -1 K 2 O were tested.
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