Wyniki wyszukiwania - Biblioteka Nauki

1

Activity of phosphomonoesterases and the content of phosphorus in the eroded Luvisols of orchard and arable soils

100%

Kobierski M. , Lemanowicz J.

Przegląd Naukowy. Inżynieria i Kształtowanie Środowiska

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2016

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tom 25

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nr 3[73]

2

Aktywność fosfomonoesteraz i zawartość fosforu przyswajalnego w glebie z ekologicznego i integrowanego systemu uprawy

100%

Lemanowicz J. , Koper J.

Ekologia i Technika

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2010

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tom R. 18, nr 1

43-47

PL

W pracy przedstawiono wyniki trzyletnich badań nad zawartością fosforu przyswajalnego oraz aktywnością fosfomonoesteraz odpowiedzialnych za przemiany fosforu w glebie dwóch systemów gospodarowania: ekologicznym i integrowanym z doświadczenia założonego w Dolnej Malancie na Słowacji przez Słowacki Uniwersytet Rolniczy w Nitrze. W systemie ekologicznym zastosowano wyłącznie nawożenie naturalne w postaci obornika, natomiast w integrowanym zastosowano nawożenia obornikiem+NPK. Nawożenie obornikiem oraz oborniklem+NPK spowodowało istotny wzrost badanych parametrów w porównaniu do gleby kontrolnej. Stwierdzono istotne zmiany aktywności fosfatazowej oraz zawartości fosforu przyswajalnego oznaczonego metodą Egnera-Riehma w okresie wegetacyjnym uprawianych roślin w trakcie trwania trzyletnich badań. Ekologiczny sposób gospodarowania doprowadził do obniżenie się zasobności gleby w fosfor przyswajalny, przy jednoczesnym wzroście aktywności badanych enzymów. Analiza wyników za lata 1999-2001 wykazała zmianę zawartości fosforu przyswajalnego w glebie w trakcie trwania trzyletniego doświadczenia. Najniższą jego zawartość zarówno w systemie ekologicznym jak i integrowanym stwierdzono w glebie pobranej w 2000 r., w którym uprawiana była kukurydza.

EN

The paper presents the results of three-year research into the content of available phosphorus and the actvity of phosphomonoesterases responsible for phosphorus transformations in soil of two management regimes: organic and integrated, from the experiment set in Dolna Malanta in Slovakia by the Slovak University of Agriculture in Nitra. The organic regime involved only natural fertilisation in a form of FYM, while in the integrated regime, FYM + NPK was applied. FYM fertilisation and FYM + NPK fertilisation resulted in a significant increase in the value of the parameters researched as compared with the control soil. There were found significant changes in the phosphatase activity and the content of available phosphorus determined with the Egner-Riehm method over the vegetation period of the crops throughout the three-year research. The organic regime decreased the richness of soil with available phosphorus and increased the activity of the enzymes researched. Analyses results obtained in years 1999-2001 demonstrated changes in the content of available phosphorus in soil throughout the three-year experiment. The lowest content of available phosphorus for the plants both in the organic regime and the integrated regime was recorded in the soil sampled in 2000 in which córn was grown.

3

Application of biochemical index to define soil fertility depending on varied organic and mineral fertilization

100%

Koper J. , Piotrowska A.

Electronic Journal of Polish Agricultural Universities. Series Agronomy

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2003

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tom 06

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nr 1

EN

In order to compare the effect of organic and mineral fertilization of various soil types, long-term fertilization experiments frequently use indices, being a function of various parameters considered simultaneously; the content of organic carbon, microbiological parameters and soil enzymatic activity. The aim of the present research was to define soil fertility based on the values of Biochemical Soil Fertility Index (B). The index has been formulated based on the research results obtained: enzymatic activity, content of organic carbon and total nitrogen. The research material was sampled from topsoil of a many-year experiment which included varied organic and mineral fertilization, established on typical lessive soil. Soil samples were collected in 1998 from winter wheat stand, four times over the vegetation period. The following enzymes were determined: dehydrogenases, alkaline phosphatases, proteases and amylases. Additionally Corg and Ntotal and pH in 1 M KC.

4

Chemical and microbial properties of sandy mine soils afforested with Scots pine and silver birch

80%

Chodak M. , Niklinska M. , Sliwinska E.

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nr 2

EN

The objective of this study was to compare chemical and microbial properties of sandy mine soils under young Scots pine, silver birch, and mixed pine-birch forest stands. The measured properties included the contents of organic C (Corg) and total N (Nt), the Corg-to-Nt ratio, pH, microbial biomass, basal respiration, and activities of dehydrogenase, acid phosphomonoesterase, and urease. Community level physiological profiles (CLPPs) of soil bacteria were determined with BiologR test and genetic profiles with the DGGE method. Scots pine and silver birch did not affect the Corg and Nt contents in the studied mine soils. The soil under birch contained larger and more active microbial biomass than the soil under pine. Under the mixed stand, most of the microbial properties were intermediate between the pine and the birch stand. The DGGE profiling indicated different composition of soil bacteria under the birch stand compared to the other stands. Differences in CLPPs were less pronounced, probably due to functional redundancy of soil bacteria.