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001-es BibID:	BIBFORM005471
Első szerző:	Kátai János (biológus, hidrobiológus)
Cím:	The effect of zeolite and bentonite on some soil chemical and microbiological characteristics and on the biomass of the test plant / Kátai János, Kremper Rita, Tállai Magdolna
Dátum:	2008
Megjegyzések:	In a pot experiment, we have studied the effect of zeolite and bentonite in different dosages in comparison to the control treatment on acidic (pHH2O=5.93) humus sandy soil. The experiment was set up in 2007 and 2008 in the greenhouse of the UD CASE Department of Agrochemistry and Soil Science. As a test plant, perennial ryegrass (Lolium perenne L.) was used. In laboratory examinations, pH(H2O), pH(KCl), hidrolytic acidity, nitrate-N content, nitrate-exploration of soil, readily available phosphorus and potassium content were determined. From among soil microbial parameters, the total number of bacteria, and microscopic fungi, the carbon-dioxide production of soil were measured. In the experiment the biomass of the test plant was determined. The effect of zeolite and bentonite in different dosages on the studied chemical and microbial soil parameters and on the plant biomass can be summarized as follows: The pH increased under the effect of low dosages. The pH increased in major extent under the effect of bentonite, than under the zeolite. With the increasing of the pH the hidrolytic acidity - at the bentonite treatments significantly decreased. Regarding the readily available nutrient content of the soil, low and medium dosages proved to be effective. High dosages of zeolite treatments reduced the nitrate-N content, high dosage of bentonite treatments reduced the nitrate-N content, the readily available phosphorus, and potassium content of soil. The degree of the nitrate-exploration increased on the effect of low and medium dosages also, but in bentonite experiments the high dosages prevented the nitrate-exploration. Regarding the measured soil microbial parameters in both treatments low and medium dosages proved to be also effective, but the high dosages didn't cause decreasing at the total number of bacteria, and by zeolite treatments the soil-respiration. The high dosages decreased the number of microscopic fungi, and by bentonite treatments the soil respiration. Also the zeolite, and bentonite treatments enlarged the biomass of the test plant. We experienced significantly increasing by zeolite treatment 4., while in bentonite treatments the medium and high dosage caused significantly increasing in plant biomass. The largest dosages also didn't decrease the plant biomass significantly. We found some medium correlation between the studied parameters. Strong correlation was found between the hidrolytic acidity of soil and the biomass of the test plant (r=-0,806). In sum, it can be stated that both zeolite and bentonite treatments had a favourable effect on some studied chemical and microbial parameters of acidic sandy soil, and on the biomass of the test plant. Regarding nutrient stock of the soil zeolite treatments were more stimulating. For microbial activity, the zeolite treatment proved to be advantageous for amount of the total number of bacteria, and carbon-dioxide production of the soil, while the bentonite treatments had a better effect on the microscopic fungi. The bentonite treatments were more effective regarding the plant biomass.
Tárgyszavak:	Agrártudományok Növénytermesztési és kertészeti tudományok előadáskivonat zeolite bentonite
Megjelenés:	International Symposium "Risk Factors for Environment and Food Safety" : November 14-15, 2008. Oradea, Romania / ed. Vasile Bara. - p. 113-120.
További szerzők:	Kremper Rita (1969-) (matematika-kémia tanár, angol szakfordító) Tállai Magdolna (1982-) (agrármérnök)
Internet cím:	elektronikus változat
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