Die Düngung im Weinbau

Siegel, O.

doi:10.1007/978-3-7091-8123-2_2

Cited by 1 publication

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“…For example, if one considers a fertilizing intensity of 2000 kg P205 per ha, which is occasionally supported as stock fertilizing to vineyards [27], and a specific activity of uranium and radium of 120 nCi/kg P205 in the fertilizer, one arrives at an increase of the specific soil activity of 100 pCi/kg. For example, if one considers a fertilizing intensity of 2000 kg P205 per ha, which is occasionally supported as stock fertilizing to vineyards [27], and a specific activity of uranium and radium of 120 nCi/kg P205 in the fertilizer, one arrives at an increase of the specific soil activity of 100 pCi/kg.…”

Section: Contribution Of Radionuelides Contained In Phosphate Fertilimentioning

confidence: 99%

Population dose from natural radionuclides in phosphate fertilizers

Pfister

Philipp

Pauly

1976

Radiat Environ Biophys

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The natural radionuclide content of mineral phosphate fertilizers has been determined gammaspectrometrically. The investigations comprised ca. 70% of the mineral phosphate fertilizers authorized and used in the Federal Republic of Germany (FRG). At maximum, we found specific activities of 62 nCi Unat/kg, 23 nCi 226Ra/kg, 1.6 nCi Thnat/kg and 262 nCi 40K/kg. The mean values, weighted by the percentual agricultural consumption of the main phosphate fertilizer groups in 1973/74 and related to the phosphate content, amounted to 58, 40, 2, and 584 nCi/kg P2O5 for Unat, 226Ra, Thnat, and 40K respectively. This resulted in an annual distribution due to phosphate fertilizing of about 3.9 muCi Unat, 2.7 muCi 226Ra, 0.1 muCi Thnat, and 39.9 muCi 40K per ha of arable or pasture land in 1973/74 on the average. From these values the air dose rates over agricultural areas have been estimated under extreme conservative assumptions resulting in an additional external exposure of members of the population of 0.02 mrd/a on the average and 0.4 mrd/a in the region of highest phosphate fertilizing intensity. If it is assumed that radium contained in phosphate fertilizers were completely accumulated in the soils during the last 80 years, this value would be raised to 0.3 mrd/a on the average. The occupational external radiation exposure due to natural radionuclides contained in phosphate fertilizers was estimated to be 0.1 mrd/a on the average and 2.3 mrd/a at maximum for persons working in agriculture. These estimates show that natural radionuclides in phosphate fertilizers contribute but very little to the mean terrestrial radiation exposure of the population which is 50 to 55 mrd/a in Germany. Only for the small group of persons working in fertilizer production plants or storehouses a significant increase of the external radiation exposure has to be expected which could reach a doubling of the mean natural exposure value.

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Section: Contribution Of Radionuelides Contained In Phosphate Fertilimentioning

confidence: 99%