Fertilization of Grass Mixture Grown on the Erosion Soils in the Sakar Mountain – Productivity | Торене на тревна смеска, отглеждана върху ерозирани почви в Сакар планина – продуктивност
2011
Vateva, V., N. Pushkarov Institute of Soil Science, Sofia (Bulgaria) | Stoeva, K., Experimental Station of Agriculture – Sredets SE, Sredets (Bulgaria)
Experiment was conducted to trace the influence of fertilizing of perennial grasses mixture of birdsfoot trefoil – smooth bromegrass on the productivity, expressed in the obtained yields of green mass, dry matter and crude protein. Attached are 9 combinations of fertilization with nitrogen, phosphorus and potassium in various norms in dual and triple combinations. The survey was conducted in the northern low-hilly part of Sakar Mountain on slightly erosion Luvisols. The results show that mineral fertilization increased the yield of green mass medium to 902.0 kg/da, and from dry mass on average 398.05 kg/da. Fertilization with two macronutrients is less effective. Highest productivity is defined as grass mixtures, fertilization rates with N18P12K6 and N18P18K6, respectively, as green mass yield obtained on average for the period of study 1781.15 kg/da and 1733.3 kg/da, and of mineral fertilizer obtained – from 66.1 kg/da crude protein - N6P6 - to 104.9 kg/da at a rate N18P18K6.
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