[Effect of fertilizer on winter wheat variety 'Moda']
2002
Dorbe, A. | Livmanis, J. | Vucans, R. (Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Agriculture. Dept. of Soil Science and Agrochemistry)
A field experiment was carried out on sandy clay loam soil at the Research and Training farm "Peterlauki" of the Latvia University of Agriculture. The effect of growing rates of phosphorus fertilizer (P0; P60; P90; P120) on the yield and quality of winter wheat was tested at two nitrogen levels (N60 and N60+60). From yield formation aspect, more suitable meteorological conditions were observed in 2000. 1999 has early and cold spring, as well as dry first half of the vegetation period, but 2001 was non-typically wet with warm end of June and start of July. The obtained data showed that better treatment was N120P60K90, what ensured average yield - 5.82 t ha*[-1). The result of growing nitrogen rates is the highest nitrogen uptake by production. Growing phosphorus rates influenced nitrogen uptake especially on background N60K90, but on background N120K90 these changes were not significant. Grain quality indices were different during experiment. The gluten content in grain was affected by fertilizer rate but gluten quality by meteorological conditions. More high grain weight per ear, uniformity and the food grain result, and volume weight have been obtained using fertilizers with N:P ratio ranging from 1:1.0-1.5 at one application, and those with N:P ratio ranging from 1:0.67-1.0 when nitrogen rate was split.
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