Uman NUH | today: 12/22/2024
| Author(s) |
Sichkar A.A., Candidate of Agricultural Science, , Uman National University of Horticulture, Ukraine Vyshnevska L.V., Candidate of Agricultural Science, , Uman National University of Horticulture, Ukraine Savranska L.M., Postgraduate, , Uman National University of Horticulture, Ukraine Chetyrko S.A., Postgraduate, , Uman National University of Horticulture, Ukraine |
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| Category | The Agronomy | ||
| year | 2013 | issue | Issue #82 |
| pages | 83-88 | index UDK | 633.2.033 | DOI |
| Abstract | While grooving of alfalfa in spring before the first mowing and in autumn after the third mowing at loosening by 18 – 20 cm soil bulk density in the layer of 10 – 20 cm was respectively, 1.16 and 1.18 g/cm3, and in the control variant (without grooving) — 1.24 g/cm3. After the third mowing of alfalfa topsoil was already sealed due to the action of cleaning machines and transport units. In the variant of grooving in spring and in autumn when loosening of soil in the 18 – 20 cm of layer of 10 – 20 cm, respectively, the bulk density reached 1.24 i 1.26 g/cm3, and in control version — 1.34 g/cm3. While grooving in spring to the depth of 18 – 20 cm, height of the plants was lower and reached 31.0 cm (phase of branching) and 63.4 cm (phase of budding), and during autumn loosening its rates have increased to 33.9 and 65.7 cm. Loosening of soil in spring to the depth of 18 – 20 cm provided the thickness of stalks in 521 per m2 and its increase against the control to 22%, and loosening in autumn brought greater increase of it to 553 pieces per m2 or 29%. While grooving alfalfa in spring at the depth of 18 – 20 cm its yield of green mass was equal to 37.4 t / ha, while the increase — 4.5 t / ha, or 13%, while loosening in autumn rates have increased, respectively, and were equal to 40.3 m / ha 7.4 t / ha, or 22%. In the variant of grooving of alfalfa in autumn to the depth of 18 – 20 cm, the largest gathering of fodder units — 8.9 t / ha was gathered, with the gain of 1.6 t / ha, or 21.9%, and — crude protein — 1, 41 t / ha, with the gain of 0.27 t / ha, or 23.6%. | ||
| Key words | bulk density, grooving, growth, stams density, green mass, productivity, feed units, crude protein. | ||