Wyniki wyszukiwania - Biblioteka Nauki

1

An impact of municipal sewage sludge and wheaten straw on some indicators of soil fertility

100%

Wołoszyk C. , Balcer K.

Polish Journal of Chemical Technology

|

2007

|

tom 9

|

nr 3

114-117

EN

In a two-factor pot experiment the impact of applied diverse doses of municipal sewage sludge and equal dose of wheaten straw, with and without supplemental mineral N and NPK fertilization, on some fertility properties of soil was assessed. The soil used in the experiment was acid brown incomplete soil (good rye complex). The grass - Festulolium - was the test plant, harvested four times and in the second year - common sunflower and blue phacelia. After the harvest of phacelia, the pH (in 1 M KCl), the content of total nitrogen, total carbon and the available forms of P, K and Mg were analyzed.Fertilization with sewage sludge and straw failed to have a significant influence on the change of the soil pH. However, all doses of sewage sludge + straw, in comparison with the control, significantly increased the content of total carbon (from 31.8 to 37.8%) and total nitrogen (from 34.3 to 52.2%) in the soil. There was significantly more phosphorus available in the soil from all the objects with sewage sludge and straw than in the soil from the control object (from 8.2 to 21.6%), while the content of potassium was higher only in the soil from the object with 1.5% of sewage sludge + straw and magnesium at the highest dose of sewage sludge. The mineral N and NPK fertilization, used against the background of sewage sludge and straw, did not have asignificant impact on the shaping of the analyzed soil fertility indicators.

2

Impact of sewage sludge and composts prepared from sewage sludge on the content and uptake of macronutrients by straw of miscanthus sacchariflorus

80%

Iżewska A. , Krzywy E. , Balcer K.

Polish Journal of Chemical Technology

|

2007

|

tom 9

|

nr 3

56-59

EN

The pot experiment was set up under the conditions of the hall of vegetation in 2002. The municipal sewage sludge and composts produced with the GWDA method in 2001 based on municipal sewage sludge with the 30% addition of structuring materials, in conversion to the dry matter, were used in the experiment. The pot experiment was set up with the split-split-plot method in three repetitions. The objects of the first factor were the doses of sewage sludge and composts (1 dose = 13 g, 2 dose = 26 g, 3 dose = 39 g, 4 dose = 52 g of dry matter in relation to the soil weight in the pot), the objects of the second factor were the types of organic fertilization (sewage sludge, 0,5-year compost prepared from sewage sludge, 1,5-year compost prepared from sewage sludge), objects of the third factor were the variants with and without nitrogen and potassium fertilization in the rates of 0.27 g N and 0.26 g K per pot. The experiment was conducted in Kick-Brauckmann's pots of 9 dm3 capacity in which 8 kg of soil were placed. The test plant cultivated in the experiment was Miscanthus sachariflorus. Seedlings of Miscanthus were planted in the first year of the experiment. The obtained results show that the content of macronutrients: nitrogen, phosphorus, potassium in straw of Miscanthus sachariflorus was not dependent on the type of organic fertilizers used in the experiment. However, supplemental nitrogen-potassium fertilization significantly increases the content of potassium in the test plant in all three years of research and nitrogen in the second year.The conducted research shows that the uptake of macronutrients depended on the dry matter yield quantity and the content of a given element in the yield. Within three years the straw of Miscanthus sacchariflorus took up the most of potassium - 11.63 g from the pot and the least of magnesium 1.20 g from the pot. The amount of the absorption of nitrogen, phosphorus and magnesium by the biomass of Miscanthus sacchariflorus from the pot on the objects fertilized with organic fertilizers was the highest in the second year of the research, which was a result of mineralization of the applied fertilizers.

3

The impact of composts prepared from different organic waste on the total number of soil microorganisms

80%

Michalcewicz W. , Wołoszyk C. , Balcer K.

Polish Journal of Chemical Technology

|

2007

|

tom 9

|

nr 2

78-80

EN

In a two-factor pot experiment impact of two doses of six types of composts prepared from the municipal sewage sludge with an addition of canteen waste, wheat straw and cocoa husk on the total number of bacteria, actinomycetes and fungi in the soil were exmined. The light soil used in the experiment was taken from the Ap level of an arable field. On all the objects with composts there was mineral NPK fertilization applied, the control object was fertilized with the NPK only. The test plant was grass Festulolium which was harvested three times and after the third cut the samples of the soil were taken for microbiological analyses.The conducted research shows that the number of microorganisms in soil was dependent on the dose and the type of the compost. The second dose of the compost, in comparison with the control object, in most composts considerably increased the number of bacteria and the first dose increased the number of actinomycetes. However, the number of fungi, in most cases, with both doses of composts, was lower than in the soil from the control object. The highest number of bacteria was noticed on the object with the co-most prepared from 35% sewage sludge + 35% canteen waste + 30% straw and actinomycetes on the object with the compost prepared from 35% sewage sludge + 35% canteen waste + 30% cocoa husk. The development of the soil fungi was restrained in the highest degree by the first dose of the compost prepared from 35% sewage sludge + 35% canteen waste + 15% straw + 15% cocoa husk and by the second dose of the compost prepared from 70% sewage sludge + 30% straw.