Document Details
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Document Type |
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Project |
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Document Title |
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The impact of herbicides on the biomass and activity of soil microbes. تأثير مبيدات الحشائش على الكتلة الحيوية ونشاط ميكروبات التربة الزراعية. |
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Document Language |
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Arabic |
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Abstract |
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Conducted the current study to determine the impact of herbicides on soil microorganisms, and activity, and biomass, in the experience of pot was the treatment of two types of soil (mud and sand) Petrkizin (20 and 200 ppm) of Mbaidan of grass commonly used T-2, 4 , 5 and D-, 4, and in the presence of plants, beans or corn. Experiment lasted for 30 days, and samples were taken from the soil after 1.3.8.15.30 days of treatment with pesticides. The results show that the tested pesticides did not cause a significant overall decrease in the number of soil microorganisms, and this happens only during the first days of treatment with pesticides, and almost equal numbers of microbes in the soil treatment with pesticides, while their numbers in the soil is treated. About the impact of herbicides on respiration, losing caused pesticides daunting moral activity in the respiratory basic catalyst after one day be added to the soil, has disappeared this effect over time in the case of soil, loam, but continued to influence in the case of sandy soils to 30 days, especially in the case of treatment pesticide 2,4,5,-T. The results of the impact of herbicides on microbial biomass that the effect was not moral in all transactions in the case of alluvial soil, while there was a significant decrease in the sandy soil insecticide treatment 2.4.5-T with its focus, generally increased microbial biomass in sandy soil Zaajh moral After 30 days of treatment with pesticides. In terms of the impact of herbicide 2.4-D and 2.5.5-T on the bean plants and corn plants have died most within 15 days from the addition of pesticides and the effect was generally higher in soil than in sandy loam soil, and the effect was most convey bean plants compared to affect plants corn, it seems that the length of the stalk of the plant is more indications of growth have been measured - effective treatment with pesticides, in general the impact of pesticides tested mild and transient, especially when the focus 20 ppm, similar to the concentration of the initial of the pesticide in the soil when added normal field rates. |
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Publishing Year |
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1415 AH
1995 AD |
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Added Date |
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Wednesday, April 30, 2008 |
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Researchers
| فهد عبدالرحمن الفاسي | alfassi, fahad abdulrahman | Investigator | Doctorate | |
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