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Wyświetlanie 1-3 z 3
Tytuł:
Effect of basic cation saturation ratios on the Mg, K and Ca content of annual ryegrass (Lolium multiflorum L.)
Autorzy:
Zalewska, M.
Wierzbowska, J.
Nogalska, A.
Powiązania:
https://bibliotekanauki.pl/articles/962261.pdf
Data publikacji:
2017
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Opis:
A pot experiment was carried out in a greenhouse to determine the optimal percentage of exchangeable Ca, Mg, and K in the CEC for improving the yield and favourable mineral composition of annual ryegrass plants. The experiment comprised 13 fertilization treatments with various basic cation saturation ratios in soil. Correlation and regression analyses revealed that the K content of ryegrass was influenced mainly by the percentage of K in the soil’s exchange complex, but was far less affected by the percentage of saturation with Ca and Mg. Higher saturation of the CEC with Mg and Ca had a negligent effect on limiting the “luxury” uptake of K by grasses. The Mg content of plants grown for green forage was significantly more influenced by the Mg : K ratio in soil than by saturation levels of Mg, which suggests that K has a strong antagonistic effect on the Mg uptake. An increase in the percentage of saturation with Ca led to a progressive increase in the Ca content of ryegrass. An increase in the percentage of saturation with Mg or K had the opposite effect. The K : (Ca+Mg) ratio in ryegrass was most highly correlated with the percentage of the CEC occupied by K. When the percentage of the CEC occupied by K exceeded 5%, the K : (Ca+Mg) ratio of the first cut was higher than 2.0, which points to undesirable proportions of those cations in ryegrass forage. To maximize the yield of annual ryegrass with optimal mineral composition, the soil exchange complex should be occupied by 50-60% Ca, 8-12% Mg and 4-5% K, and the Mg : K ratio in soil should be maintained at 2-3 : 1.
Źródło:
Journal of Elementology; 2017, 22, 4
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of basic cation saturation ratios in soil on yield of annual ryegrass (Lolium multiflorum L.)
Autorzy:
Zalewska, M.
Nogalska, A.
Wierzbowska, J.
Powiązania:
https://bibliotekanauki.pl/articles/15001.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Źródło:
Journal of Elementology; 2018, 23, 1
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of a harvest time and cultivar on the chemical composition and in vitro ruminal dry matter degradability of perennial ryegrass (Lolium perenne L.)
Autorzy:
Purwin, C.
Stanek, M.
Lipinski, K.
Wierzbowska, J.
Nogalska, A.
Fijalkowska, M.
Powiązania:
https://bibliotekanauki.pl/articles/15500.pdf
Data publikacji:
2016
Wydawca:
Uniwersytet Warmińsko-Mazurski w Olsztynie / Polskie Towarzystwo Magnezologiczne im. Prof. Juliana Aleksandrowicza
Opis:
The aim of this study was to determine the effect of a harvest time on the chemical composition and dry matter degradability of perennial ryegrass (Lolium perenne L.) depending on a swath and cultivar (Bajka - diploid; Baronka - tetraploid). The herbage was harvested at four times of the day (6:00, 10:00, 14:00, 18:00) – the first swath on 15th May 2012, and next after 4, 5 and 6 weeks. Chemical composition and dry matter degradability after 48 hours of in vitro incubation were determined. All the analyzed treatments had an impact on the content of DM, crude protein and soluble and structural fractions of carbohydrates. The diploid cultivar had a greater content of DM, WSC and aNDF (P<0.01) and a lesser content of crude protein and ADF (P<0.01) compared with the tetraploid cultivar. Dry matter of the first swath herbage was characterized by the greatest content of WSC and the least content of aNDF (P<0.01). In each consecutive swath, the WSC content significantly decreased (P<0.01) while aNDF increased (P<0.01). The increase in DM content between 14:00 and 18:00 was due to the deposition of products of photosynthesis, which is confirmed by a parallel increase in the concentration of WSC. The effect of treatments on the degradability of DM in vitro has not been confirmed, but the results indicate a smaller impact of a cultivar than the harvest management. Numerous interactions between the analyzed treatments indicate the need to choose the harvest time depending on a genotype and swath. Ruminal degradability indicates that high value ryegrass can be obtained regardless of the harvest time during the day. However, greater suitability for ensiling was shown by the diploid cultivar harvested at 10:00 and the tetraploid harvested at 18:00.
Źródło:
Journal of Elementology; 2016, 21, 3
1644-2296
Pojawia się w:
Journal of Elementology
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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