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1 Polish Journal of Soil Science

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The Content of Live Microbial Biomass in the Soil in Case of Various Crops on the Example of the Farm in Starza

100%

Rygielski K. , Cybulska K.

tom 50

nr 1

As it is well known, the share of microorganisms in the fertility and soil health is very important. Soil microorganisms play a major role in organic matter mineralization, provide nutrients to plants, and improve the soil structure. The size of the soil organisms is very variable. It depends primarily on the water and air relations in the soil as well as the temperature. The aim of the research was to determine the content of live microorganisms biomass in the soil under rape, maize, bean and wheat crops including the rhizosphere. The analyzes were carried out in different vegetation periods and phases of plant development on the example of the farm in Starza. Determination of living microorganisms biomass was carried out applying the method developed by Anderson and Domsch. The biomass content of live microorganisms in the soil was dependent on the cultivated plant, growing date and phase, as well as the proximity of the rhizosphere.

Assessment of the compost made of poultry post-slaughter waste on a background of commercial preparations applying the phytotoxkit analysis

80%

Cybulska K. , Wrońska I. , Rygielski K. , Kowarska M.

tom 51

nr 1

One of the problems in the development of the agro-food industry is the production of enormous quantities of organic waste. In recent years, in order to minimize the negative impact of waste on the environment, emphasis is put on their recycling. Organic matter derived from poultry industry waste can be processed into other products, including compost. The aim of the study was to evaluate the phytoremediation of selected plant species on the compost substrate obtained from the poultry waste as compared to other commercial composts available on the market. Analyses used the Phytotoxkit containing three test species: sorghum (Sorghum saccharatum), bittercress (Lepidium sativum) and white mustard (Sinapis alba). The test plants were placed on four different substrates: control soil, poultry compost, vermicompost and Compo Sana®. Phyto-reactivity of plants tested on compost prepared from poultry waste on a background of other commercial products was dependent on the plant species and the type of substrate. Poultry waste compost exhibited equally good nutritional properties in the composition of macro and micronutrients, which determined the growth and development of seedlings. It particularly refers to the stimulation of the growth of underground parts of mustard and bittercress, respectively 65% and 86% of the control value, and the aboveground parts, that were higher by 46% and 38%, respectively.