Yield is a complex trait and is a function of several component characteristics and their interactions with the environment. As experimental material was used the sunflower hybrid NK Neoma. Under unfertilized conditions and treatments with N50P50K0 and N50P50K50, were carried out measurements on thousand kernel weight, test weight, oil an protein content. The objective of this research was to assess the correlations between several grains traits under different fertilizations in order to obtain efficient grain yields or amount of oil. Considering all the results it can be seen that the applied fertilization has had a strong influence on the intensity and nature of the relationships between different traits. Thus, under unfertilized conditions the TKW has a significant and major influence of approximately 79.43% to yield achievement, while under the fertilization with N50P50K0 the contributions of the two morphological grains traits are balanced, following that under the effect of fertilization with N50P50K50 the test weight will have a predominant influence of about 96% on yield variability. Under unfertilized conditions the test weight has a main and significant contribution of 91.73% to oil accumulation in grains, instead under the fertilization with N50P50K0 the influence (83.28%) of TKW is the most important, resulting balanced effects of the two morphological grains traits under the fertilization with N50P50K50. This information is necessary for the orientation of the technological works in order to obtain morphological characteristics of the grains that can ensure efficient yields or amount of oil.

sunflower, correlations, grains traits, fertilization

field crops and pastures

Presentation: oral