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001-es BibID:BIBFORM057915
Első szerző:Sándor Zsolt (agrármérnök, mérnöktanár)
Cím:Effect of herbicide's ingredients on soil microbiological processes in a small plot experiment / Sándor Zsolt, Zsuposné Oláh Ágnes, Kátai János, Tállai Magdolna, Szilágyi Gergely
Megjegyzések:Pesticides play a very important role in the regulation system of weeds, but have to be counted with the secondary effect of chemicals on soil life and on the so called "not purposed" soil organisms. In this paper the objective of study was to examine the effect of two various herbicide's ingredients on some microbiological parameters of a chernozem soil (Chernozems in WRB) with loam texture. The active ingredients of herbicides are the acetochlor (Acenit A 880 EC) and isoxaflutole (Merlin 480 SC), applied in maize culture to the soil surface. The effect of the herbicides was investigated on the sensitivity and quantity change of soil microorganism and biological parameters of soil in small plot experiment. In the experiment the single, double and five time doses of the recommended herbicide doses were applied and examined on the number of total bacteria and microscopic fungi, on the quantitative changes of aerobic cellulose decomposing and nitrifying bacteria, on soil respiration, on quantity of microbial biomass carbon (MBC) and nitrogen (MBN) for four years. The laboratory examinations were carried out in the soil chemical and microbiological laboratories of Institute of Agrochemistry and Soil Science, Debrecen University. Data analysis was performed using Microsoft Excel 2003 (mean values and standard deviation). Two factors variance analysis was used to get significant effect on measured parameters. The significant differences were accepted at the level 1%, but the evaluation was calculating by the LSD5% values as accepted in the agricultural research. The various microbial groups had different sensitivity on the increasing doses of herbicides, the number of total bacteria decreased significantly, while the number of microscopic fungi and cellulose decomposing bacteria increased. The MBC and MBN increased in most of the treatments of acetochlor, but the isoxaflutole had negative effect on these two parameter. Close correlation was found between some microbial soil parameters. Both herbicides had inhibiting effect on the total soil bacteria. The quantity of microscopic fungi and cellulose decomposing bacteria increased significantly by the various doses of herbicides. CO2-production was stimulated by each treatment, except by the basic doses of herbicides. In order to choose the suitable herbicide for agricultural practice, comparative evaluation would be necessary. In summary those chemicals may be recommended for agricultural use, which cause less inhibition effect on soil microbiological parameters.
Tárgyszavak:Agrártudományok Növénytermesztési és kertészeti tudományok előadáskivonat
soil microbes
C- and N cycle of soil
MBC, CO2-production
Megjelenés:9th International Soil Science Congress on "The Soul of Soil and Civilization" : Book of proceedings / ed. R. Kizilkaya, C. Gülser. - p. 1020-1025. -
További szerzők:Zsuposné Oláh Ágnes (1949-) (agrármérnök) Kátai János (1950-) (biológus, hidrobiológus) Tállai Magdolna (1982-) (agrármérnök) Szilágyi Gergely (1987-) (növénytermesztő)
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