Title: Effects of the soil organic fertilizers onto the carbofuran soil and plant metabolisms in field cauliflower crops
Abstract: A spring cauliflower crop was made on the loamy sand soil of a field whose plots had been amended, one month before planting, with one of the organic fertilizers: city refuse compost, or mushroom cultivation compost, or cow manure; there were also unamended control plots. Some days after planting, an emulsion of carbofuran in water was applied onto soil, around the stem of the plant, for protection against the root fly. During growth of the crop, the rates of carbofuran soil biodegradation were smaller in the organic fertilizers amended plots, than in the unamended controls; the intensity of the effect was in the increasing order: city refuse compost < cow manure < mushroom cultivation compost. The organic fertilizers thus increased the insecticide soil concentrations; they thus should increase the insecticide protection efficiency against soil insects. During the final period of the crop, the rates of carbofuran soil biodegradation increased, and the organic fertilizers effects were levelled off; at harvest, the carbofuran soil residues were similar in the amended and unamended plots. The transport of carbofuran from soil into the plant foliage also was greater in the plants grown on the organic fertilizers amended plots, than on the unamended plots. At the end of the spring crop, a summer cauliflower crop was made on the same plots, i.e. 3.5 months after the organic fertilizers soil incorporation; the organic fertilizers effects onto the carbofuran soil biodegradation rates—i.e. the decrease of the soil biodegradation rates, relative to the unamended plots—were equal or greater in the summer crop, than they were in the spring one. Similar effects were observed in a summer cauliflower crop made in another field whose soil was silt loam. At harvest, no carbofuran, nor its metabolites were detected in the ‘flower’ of cauliflower of all trials plots. Key words: Carbofurancauliflowersoil metabolismplant metabolismcow manurecity refuse compostmushroom cultivation compost
Publication Year: 1991
Publication Date: 1991-08-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 1
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