The mineral element content in the dry matter yield of the grazing swards | Minerālvielu saturs ganību zelmeņu sausnas ražā
2019
Adamovics, A., Latvia Univ. of Life Sciences and Technologies, Jelgava (Latvia). Faculty of Agriculture | Gutmane, I., Latvia University of Life Sciences and Technologies, Skriveri, Skriveri Municipality (Latvia). Research Inst. of Agronomy
Field trials were carried out with the aim to study the herbage mineral element content of multi-species grass and legume–grass swards for grazing on three types of soil: sod-calcareous, sod-podzolic and sod stagnogley soil. The following two nitrogen fertilisation rates were used: N0 and N120. Data from the third production year were analysed for the following content of minerals in dry matter (DM) yield: crude ash, calcium (Ca), phosphorus (P) and potassium (K). Legume containing mixtures achieved a higher Ca content in comparison with grass-only swards. Higher K content for grasses only swards was determined on sod-calcareous and sod stagnogley soils. Higher K content in legume containing swards was determined on sod-podzolic soil. A positive influence of N fertilisation on the mineral element content on sod stagnogley soils was not determined. The N-fertilizer rate increase from 0 to 120 kg haE−1 contributed to a significant ash and K content increase on sod-podzolic soil, and significant K content increase on sod-calcareous soil. The results of the third production year on all soil types showed a significant (p is less than 0.01) positive Ca content correlation with the proportion of legumes in swards, NEL and DM digestibility. Ca content had a significant (p is less than 0.01) negative correlation with crude fiber, NDF and ADF content in DM yield. P content had a significant (p is less than 0.01) positive correlation with the crude protein content and (p is less than 0.05) with ash content in DM yield.
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