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Zmiany skladu chemicznego Holcus lanatus pod wplywem nawozenia azotem

100%

Zielewicz W.

Łąkarstwo w Polsce

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2003

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tom 06

179-190

The objective of this research project was to determine changes in quantitative occurrence of organic and mineral components affecting, directly and indirectly, fodder value following nitrogen fertilisation. Investigations were carried out in years 1997-2000 on two experimental plots. Analytical material was derived from two experiments. Experiment I was established on the collection of Holcus lanatus. Experiment II was of production nature and was established on a permanent meadow. Identical fertilisation with phosphorus (70 kg ha⁻¹) and potassium (60 kg ha⁻¹) were applied on both objects. In the case of nitrogen, two levels of fertilisation i.e. 50 and 100 kg ha⁻¹ per regrowth were applied. The applied nitrogen fertilisation levels reflected current opinions associated with meadow fertilisation containing Holcus lanatus. The assessment criteria of Holcus lanatus response to nitrogen fertilisation included: protein, sugars, cellulose, hemicelluloses, lignins, phosphorus, calcium, magnesium, potassium. The obtained results enlarge our knowledge about fodder value of Holcus lanatus. It turned out that the examined grass responded with positive changes of its chemical composition to nitrogen fertilisation. It can be assumed that fertilisation allows obtaining velvet grass, which is more friendly for animals. One application of 50 kg ha⁻¹ N dose can be recommended as a more rational amount to be used on meadows containing Holcus lanatus in their composition. The use of higher nitrogen doses failed to yield significant qualitative results. Holcus lanatus can accumulate nitrate nitrogen in amounts, which can be dangerous for animal health and productivity. That is why periodical control of its content is justified.

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Modelowe badania nad wplywem terminu zbioru pierwszego odrostu na wielkosc i jakosc plonu tymotki lakowej Kaba

100%

Lyszczak R.

Łąkarstwo w Polsce

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2001

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tom 04

75-89

A systematic weekly cutting of timothy grass over the period of the first regrowth allowed to evaluate the changes in yields, chemical composition as well as energetic value and organic matter digestibility over different development phases of the species. The range of the changes was presented as multi-factorial regression equations. A majority of the parameters studied had a high determination coefficient. Over the whole vegetation period yields and the fibre content were higher, while total protein, PDIN, PDIE and PDIF, as well as fat gross energy, UFL, UFY, ash, calcium and phosphorus content were decreasing. The most remarkable changes were noted the period from spreading to earing, white the magnitude of changes decreased over the period of flowering and seed maturing. The most significant changes of energy concentration and its digestibility as well as organic matter digestibility were noted at the last cuts. A significant effect of thermal conditions and the rainfall on the timothy grass development was observed in the spring time. A difference of a dozen days in the earing time was noted over the study period of four years. As results from the fibre content, a later earing time was accompanied not only by increasing yields but also by higher fibre amounts. In the same periods drought and high temperatures caused a decrease of the amount and digestibility of energy. Besides, weather conditions (cold or hot spring) changed directions of the changes of soluble sugars and fat accumulation as well as calcium and phosphorus content.

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Wplyw terminu zbioru pierwszego odrostu na plonowanie i wartosc pokarmowa wybranych odmian kostrzewy lakowej, zycicy trwalej i Festulolium

84%

Lyszczarz R., Zimmer-Grajewska M., Sikorra J.

Zeszyty Naukowe Akademii Techniczno-Rolniczej w Bydgoszczy. Rolnictwo

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1999

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tom 44

185-193

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Wplyw terminu zbioru pierwszego odrostu Dactylis glomerata cv. Astera oraz jej mieszanki z Medicago lupulina cv. Renata na ilosciowe i jakosciowe parametry paszy

67%

Lyszczarz R.

Materiały Seminaryjne. Instytut Melioracji Użytków Zielonych

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1999

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tom 44

183-192

Ograniczanie wyników

2 Łąkarstwo w Polsce

1 Materiały Seminaryjne. Instytut Melioracji Użytków Zielonych

1 Zeszyty Naukowe Akademii Techniczno-Rolniczej w Bydgoszczy. Rolnictwo

2 Lyszczarz R.

1 Lyszczak R.

1 Sikorra J.

1 Zielewicz W.

1 Zimmer-Grajewska M.

1 2003

1 2001

2 1999

Zmiany skladu chemicznego Holcus lanatus pod wplywem nawozenia azotem

Modelowe badania nad wplywem terminu zbioru pierwszego odrostu na wielkosc i jakosc plonu tymotki lakowej Kaba

Wplyw terminu zbioru pierwszego odrostu na plonowanie i wartosc pokarmowa wybranych odmian kostrzewy lakowej, zycicy trwalej i Festulolium

Wplyw terminu zbioru pierwszego odrostu Dactylis glomerata cv. Astera oraz jej mieszanki z Medicago lupulina cv. Renata na ilosciowe i jakosciowe parametry paszy