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Wyszukujesz frazę "long-term experiment" wg kryterium: Temat


Wyświetlanie 1-2 z 2
Tytuł:
Basic soil chemical properties after 15 years in a long-term tillage and crop rotation experiment
Autorzy:
Neugschwandtner, R.W.
Szakova, J.
Pachtrog, V.
Tlustos, P.
Cerny, J.
Kulhanek, M.
Kaul, H.-P.
Euteneuer, P.
Moitzi, G.
Wagentristi, H.
Powiązania:
https://bibliotekanauki.pl/articles/2082653.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
tillage
soil depth
long-term experiment
soil
properties
no-till
Opis:
Basic soil chemical properties were assessed in a long-term tillage and crop rotation experiment 15 years after its establishment on a Chernozem in Raasdorf (Austria) with four tillage treatments – mouldboard ploughing, no-till, deep conservation tillage and shallow conservation tillage – and two crop rotations. The following parameters were assessed: pHCaCl2, pHH2O, electrical conductivity, cation exchange capacity, total nitrogen, total organic carbon and total carbon. Among which, pHCaCl2, pHH2O, and total carbon increased with soil depth while electrical conductivity, cation exchange capacity, total nitrogen, and total organic carbon decreased with soil depth. The differences between tillage treatments occurred after 15 years in the upper soil layer from 0-5 cm with higher values of electrical conductivity under no-till, deep conservation tillage and shallow conservation tillage than with mouldboard ploughing, higher values of cation exchange capacity and total nitrogen for no-till than for mouldboard ploughing (with deep conservation tillage and shallow conservation tillage showing intermediate values) and more total organic carbon for no-till and deep conservation tillage than for mouldboard ploughing. At a 5-10 cm depth, electrical conductivity was higher for no-till than for mouldboard ploughing. Values of pHCaCl2 and pHH2O did not differ between tillage treatments in any soil layer. In deeper soil layers, tillage did not affect the analysed parameters. Crop rotation did not affect any of the analysed soil chemical properties.
Źródło:
International Agrophysics; 2020, 34, 1; 133-140
0236-8722
Pojawia się w:
International Agrophysics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Balance of heavy metals [Cd, Ni, Pb] in static fertiliser experiments on grasslands
Autorzy:
Curylo, T
Powiązania:
https://bibliotekanauki.pl/articles/1448702.pdf
Data publikacji:
2001
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
grassland
long-term experiment
balance
soil
meadow soil
mineral fertilizer
soil property
degraded ecosystem
anthropogenic ecosystem
agricultural chemistry
heavy metal
Opis:
On the basis of results obtained in 2 static experiments conducted on light and heavy soils with differentiated mineral fertilisation, an approximate balance of Cd, Ni and Pb was determined over 20 years of investigations. The experiments included 3 levels of fertilisers and the control plot. Ammonium nitrate, single or triple superhosphate and potassium salt were used for the treatments. Average amounts ofheavy metals introduced with the fertilisers in both experiments over twenty years were as follows: 37-110 g Cd, 63-195 g Ni and 62-202 g Pb ha-1. The balance ofheavy metals over twenty years assumed different values depending on the fertilisation level and soil conditions. However, irrespective of those factors, the balance assumes a negative value. The effect of nitrogen doses on the balance was slight and depended on the site trophicity. On the other hand, increasing doses of phosphorus and potassium treatment decreased the value of the negative balance difference of cadmium and, to a lesser degree, of nickel, but increased the lead balance.
Źródło:
Acta Agrophysica; 2001, 51; 189-199
1234-4125
Pojawia się w:
Acta Agrophysica
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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