Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 5

Liczba wyników na stronie
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników

Wyniki wyszukiwania

help Sortuj według:

help Ogranicz wyniki do:
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
In 2010-12 a field experiment aimed at assessing the content of mineral nitrogen (N-NO₃, N-NH₄) in the tilled layer (0-30 cm) and subsoil (30-60 cm), and the level of nutrition of sucrosorgo were conducted in research in Pawłowice at Wroclaw University of Environmental and Life Sciences. The influence of: urea and polyolefin-coated urea (Meister®), in comparison to the control without fertilizing were studied. The fertilizer was applied before sorghum sowing in doses of 60 and 120 kg N·ha⁻¹. Meister® in comparison to urea, positively influenced the decreasing of N-NO₃ accumulation in both soil layers, with higher N-NH₄ concentrations in the tilled layer.
The aims of the study were to determine the impact of various forms of nitrogen on the content and uptake of cooper, iron, manganese and zinc by sweet sorghum and to check what remains in the bagasse after extracting the plant juice. In 201-2011, field experiments were conducted on sweet sorghum (cv. Sucrosorgo 304) fertilized with different forms of nitrogen (nitrate, ammonium and urea). The fertilizer containing ammonia nitrogen markedly increased the amount of Mn in both years of the study and raised the amount of Zn in 2010. On average, significantly more Fe was found after fertilizing with nitrates (calcium nitrate), and more Zn was found after fertilizing with the form of ammonium (ammonium chloride). In 2010, there were significantly higher increments in the content of all the microelements. A lower content of microelements was found in the bagasse than in the whole plants. On average, throughout the whole study, a significant impact of the fertilization variants on the Zn content appeared. The highest uptake of Cu was found in plants which had been fertilized with nitrate and ammonium forms of nitrogen (ammonium nitrate), whereas Mn and Zn increased when fertilization included ammonium in the form of ammonium sulphate. After fertilizing with ammonium chloride, the uptake was slightly lower. On average for 2010-2011, the highest level of Cu, Mn and Zn occurred in the bagasse from plants that had been fertilized with ammonium chloride.
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 1 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.