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Titolo:
LYSIMETER INVESTIGATIONS ON THE EFFECT OF WINTER CATCH CROPS AND WEEDED FALLOW ON THE N-DYNAMICS IN A SANDY TREPOSOL SOIL OF NORTHEAST GERMANY
Autore:
MERBACH W; HOLZEL D; SCHALITZ G; PICKERT J; JACOB HJ; LATUS C;
Indirizzi:
ZENTRUM AGRARLANDSCHAFTS & LANDNUTZUNGSFORSCH EV,INST RHIZOSPHARENFORSCH & PFLANZENERNAHRUNG D-15374 MUNCHEBERG GERMANY ZENTRUM AGRARLANDSCHAFTS & LANDNUTZUNGSFORSCH EV,FORSCH STN PAULINENAUE D-15374 MUNCHEBERG GERMANY ZENTRUM AGRARLANDSCHAFTS & LANDNUTZUNGSFORSCH EV,INST LANDNUTZUNGSSYST & LANDSCHAFTSOKOL D-15374 MUNCHEBERG GERMANY ZENTRUM AGRARLANDSCHAFTS & LANDNUTZUNGSFORSCH EV D-15374 MUNCHEBERG GERMANY
Titolo Testata:
Isotopes in environmental and health studies
fascicolo: 1-2, volume: 33, anno: 1997,
pagine: 53 - 59
SICI:
1025-6016(1997)33:1-2<53:LIOTEO>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
NITROGEN;
Keywords:
BRASSICA NAPUS L.; CATCH CROPS; FALLOW; GROUNDWATER; N-LEACHING; LYSIMETER INVESTIGATIONS; NITROGEN 15; PHACELIA TANACETIFOLIA BENTH; SINAPIS ALBA L.;
Tipo documento:
Article
Natura:
Periodico
Citazioni:
10
Recensione:
Indirizzi per estratti:
Citazione:
W. Merbach et al., "LYSIMETER INVESTIGATIONS ON THE EFFECT OF WINTER CATCH CROPS AND WEEDED FALLOW ON THE N-DYNAMICS IN A SANDY TREPOSOL SOIL OF NORTHEAST GERMANY", Isotopes in environmental and health studies, 33(1-2), 1997, pp. 53-59

Abstract

Lysimeter experiments (soil: sandy treposol, from the region ''Havellandisches Luch'', Brandenburg, Germany) with application of N-15 labelled fertilizer (80 kg N per ha as (NH4)-N-15 (NO3)-N-15, at.-% N-15 exc.; for simulating mineralization in the early autumn period) were carried out to determine to what extent the amount of mineral-N was temporary conserved by winter catch crops, taken up subsequently in the vegetation periods by following crops, taken by subsequently in the vegetation periods by following crops, or percolated in the leaching water,respectively. The results were as follows: 1) Until winter or spring respectively, the catch crop uptake rates of applied mineral-N were 32% for phacelia (Phacelia tanacetifolia BENTH.), 25 % for winter rape (Brassica napus L. cv. 'AKELA'), and 16 % for white mustard (Sinapis alba L.). 2) In the year after, following maize incorporated from 2.1 to 4.5 % of the fertilizerborne N. The Following plant community of fallow took up from 0.2 to 0.5 % N originating from the Fertilizer-N. 3) In comparison with the catch crops, N-leaching losses under fallow conditions were highest and equivalent to 17 % of the applied fertilizer-N amount. In contrast to 3 % of white mustard, phacelia and winter rape reduced N-leaching losses to 0.2 and 0.3 % of the applied fertilizer-N amount. 4) In spring of the first pear after the beginning of investigations, N-leaching losses were highest under fallow conditions and white mustard cultivation. Thus, the amounts of nitrate losses would exceed the EU limit for drinking water. 5) Three years after the investigations had been started, 10 % (white mustard) and 20 % (fallow) of the applied fertilizer-N was still found in th lysimeter soil.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/09/20 alle ore 01:04:36