Research on the Influence of Sowing Age and Density in Winter Barley Production, with Organic and Mineral Fertilization

The polifactorial experience was held in the agricultural year 2013 - 2014, in the Experimental Center Chiscani. Experience had two sub-experience, each with two experimental factors, as follows: I: sowing time (factor B) and different fertilization (factor C); and II: different sowing densities (factor A) and different fertilization (factor C). At harvesting were made biometric measurements, and determining production (kg/ha), thousand grain weight (g) and hectolitre mass (kg/hl) for each experimental variant. The results were statistically analysed by a method of analysis of variance (ANOVA) and correlation. The average number of ears/plant, average number of kernels/spike, kernels per ear mass was positively impacted by organic fertilization, which significantly influenced the increase in production compared to chemically fertilized variants. In the present research work we demonstrated that winter barley production can be improved by application of organic fertilizer, especially in lower sowing densities and for correction of delayed sowing. The best production results were obtained from version B3 fertilized biological, meaning an increase of production of 1300 kg/ha, that is 20 % from the average experience.