Published in Scientific Papers. Series A. Agronomy, Vol. LXIII, Issue 1
Written by Emilia CONSTANTINESCU, Liviu Aurel OLARU, Ramona Aida PĂUNESCU
Between 2016-2018, 15 varieties of winter wheat were tested in 3 variants of fertilization (V1 = unfertilized, V2 = N40P40 administered in autumn and V3 = N100P40 administered in autumn + spring) on Simnic luvosoil. The following were analyzed: yield, thousand grains weight, test weight, protein content and sedimentation index. Wheat yield was significantly higher when the nitrogen dose increased from N0 to N40 and from N0 to N100. All tested varieties, without exception, registered a statistically assured protein increase when the nitrogen dose was increased to N100.The correlation between the protein content obtained in the unfertilized variant and the protein content when fertilized with N40P40 is extremely strong (r = 0.912). For the studied interval, the coefficient of determination suggests that approximately 83% of the variability of the protein content to N40P40 is associated with the protein content from the unfertilized variant. Also, the correlation between the protein content obtained in the unfertilized variant and the protein content when fertilized with N100P40 is positive and extremely strong (r = 0.877). Approximately 77% of the variability of the protein content at N100P40 is associated with the protein content in the unfertilized variant.
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