Preferencje help
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 16

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
The paper aimed at defining the specific biochemical parameters, as well as the use of treatment methods, according to types and intensity of the clinical signs of non-complicated hypophosphataemia in cows. The investigations were carried out on 300 HF cows in 15 herds in the Lublin Region. The mean milk yield in the herds was 36.8 ±2.8 dl. The cows were 3-9 years old and had a similar diet ratio. The animals with hypophosphataemia symptoms in the early stadium (2-7 d) were divided into three groups according to the intensity of clinical signs whereas the control group consisted of cows with no clinical signs of the illness. The inorganic phosphorus (Pi), total Ca, total Mg, K, Fe, total protein, Cu, bilirubin, FFA, and creatinine concentrations, as well as AST and AP activity, were determined in serum and plasma. The animals with markedly exhibited signs (recumbency and tremor) showed significantly decreased Pi, Mg, and FFA contents and simultaneously increased activity of AST and AP. In the group exhibiting minimal signs (group I), there were no significant disturbances in homeostasis except the low Pi concentration, so it was possible to use the specialised phosphorus preparations in the treatment. In the other groups (II, III), which exhibited more marked signs of the illness, it was necessary to improve the parenchymal organs functions in addition to phosphorus level normalisation.
Phosphorus is an important life-supporting nutrient and therefore it is often applied in fertilizers. As a result, its pool in soil may increase due to the presence of various elements effectively binding P, making it unavailable to plants. Each soil exhibits many characteristics important in P cycling, with the aeration state (redox potential and moisture), pH, and the presence of N, Ca, and Fe being the most important. In addition, agricultural practices, e.g. fertilization, may strongly affect P pools in the soil. We studied 7 different, both cultivated and natural, soil types from Lubelskie region. We found that agricultural practices strongly affected the soil aeration state, pH, and moisture level reducing them signifi cantly. As a result, phosphate concentrations increased signifi cantly up to 10 mg kg-1 in comparison to ca. 2– 4 mg kg-1 in non-cultivated soils. This was caused by changes in soil characteristics depending on the soil type (availability of N, Ca, and Fe). The levels of nitrates increased up to 50 mg kg-1, favouring P immobilization. It could be concluded that the soil aeration state (related to the manner of soil use) is important in P cycling through the effect on other soil characteristics, which differ among soil types.
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.