2. Leaves proportion in cereals averaged over the years of cultivation accounted
from 35.4 to 42.5%.
3. Productivity of all investigated factors increased only by 0.13 – 0.20 t/ha or by
2-3% at HIP05 - 0.30 t/ha on average over three years.
4. Changes of physico-chemical parameters of soil under the cereal grasses
stemmed from the influence of the root system to penetrate into the thickness of the
soil profile. Established, that the content of mobile phosphorus and exchangeable
potassium increased in all variants of perennial cereal grasses, for instance, during the
cultivation of Festuca orientalis and Dactylis glomerata: Р
2
О
5
increased by 12% and
К
2
О by 16.4% respectively.
5. Cultivation of cereal grasses on sod-podzolic soils caused an increasing of their
fertility, in particular increasing of nitrogen, phosphorus and potassium.
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