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001-es BibID:	BIBFORM005559
Első szerző:	Kátai János (biológus, hidrobiológus)
Cím:	The effect of zeolite and bentonite on some soil characteristics on acidic sandy soil / János Kátai, Rita Kremper, Magdolna Tállai
Dátum:	2008
Megjegyzések:	In a pot experiment, we have studied the effect of zeolite and bentonite in different dosages [control-5 (1x)-10 (2x)-15 (3x)-20 (4x) g kg-1] in comparison to the control treatment on acidic (pHH2O=5.58) humus sandy soil. The experiment was set up in 2007 in the greenhouse of the UD CASE Department of Agrochemistry and Soil Science. As a test plant, perennial ryegrass (Lolium perenne L.) was used. The samples were collected four and eight weeks after sowing. In laboratory examinations, nitrate-N content, readily available phosphorus and potassium content were determined. From among soil microbial parameters, the total number of bacteria, the amount of cellulose-decomposing bacteria, the carbon-dioxide production of soil and saccharase activity were measured. The effect of zeolite and bentonite in different dosages on the studied chemical and microbial soil parameters of a sandy soil can be summarized as follows: Regarding the readily available nutrient content of the soil, low and medium dosages proved to be effective, high dosages of both treatments reduced the nitrate-N content. A high dosage of zeolite significantly increased the readily available phosphorus content of the soil, it also increased (not significantly) the AL-soluble potassium content. A high dosage of bentonite reduced (not significantly) the AL-soluble phosphorus content of the soil and increased the readily available potassium content. Among the soil microbial parameters, the total number of bacteria was measured and it was increased by both treatments. The low (1x) and medium (2x, 3x) dosages resulted in a significant increment for zeolite and bentonite treatments, respectively. The bentonite treatments resulted in a larger increment than the zeolite treatments. The twofold dosages of both treatments tripled the number of cellulose-decomposing bacteria. The number of bacteria increased significantly as a result of the medium-dosage bentonite treatment. The highest dosage of both treatments reduced the number of bacteria below that of the control. The CO2-production of the soil was significantly increased by the two- and threefold dosages of zeolite and by the low and medium dosages of bentonite. Based on our results, the zeolite treatments proved to be more effectibe as regards soil respiration. Saccharase activity was significantly increased by the basic dosage (1x). Medium dosages resulted in a significant and non-significant increase in enzyme activity in the case of bentonite and zeolite treatments, respectively. The largest dosage of both treatments reduced the enzyme activity. In the correlation analysis, we found a tight positive correlation between the soil nitrate-N content and the saccharase activity (r=0.880). In the case of the bentonite treatments, we also found a tight positive correlation between the changes in the total number of bacteria and saccharase activity (r=0.869). We found medium correlations between numerous other soil parameters. 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 soils. The zeolite treatments were more effective regarding the nutrient stock of the soil. For microbial activity, the zeolite treatment proved to be advantageous for the carbon dioxide production of the soil, while the bentonite treatments had a better effect on the total number of bacteria, the amount of cellulose-decomposing bacteria and the saccharase activity.
Tárgyszavak:	Agrártudományok Növénytermesztési és kertészeti tudományok idegen nyelvű folyóiratközlemény hazai lapban sandy soil soil microbiology nutrient content zeolite bentonite
Megjelenés:	Journal of agricultural sciences = Acta Agraria Debreceniensis. - Suppl. (2008), p. 117-122. -
További szerzők:	Kremper Rita (1969-) (matematika-kémia tanár, angol szakfordító) Tállai Magdolna (1982-) (agrármérnök)
Internet cím:	elektronikus változat
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