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Titolo:
Soil development on loess substrate in central Germany - results of a long-term trial on soil formation
Autore:
Beschow, H; Gransee, A; Merbach, W;
Indirizzi:
Univ Halle Wittenberg, Inst Pflanzenernahrung & Bodenkunde, D-06108 Halle,Germany Univ Halle Wittenberg Halle Germany D-06108 kunde, D-06108 Halle,Germany
Titolo Testata:
JOURNAL OF PLANT NUTRITION AND SOIL SCIENCE-ZEITSCHRIFT FUR PFLANZENERNAHRUNG UND BODENKUNDE
fascicolo: 4, volume: 163, anno: 2000,
pagine: 359 - 365
SICI:
1436-8730(200008)163:4<359:SDOLSI>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Soggetto:
PARTICLE-SIZE FRACTIONS; ORGANIC-MATTER; FERTILIZATION; TURNOVER;
Keywords:
soil development; soil organic matter; nutrient dynamics; loess;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
30
Recensione:
Indirizzi per estratti:
Indirizzo: Beschow, H Univ Halle Wittenberg, Inst Pflanzenernahrung & Bodenkunde, Adam Kuckhoff Str 17B, D-06108 Halle, Germany Univ Halle Wittenberg Adam Kuckhoff Str 17B Halle Germany D-06108
Citazione:
H. Beschow et al., "Soil development on loess substrate in central Germany - results of a long-term trial on soil formation", J PLANT NU, 163(4), 2000, pp. 359-365

Abstract

In 1948, a model soil formation trial was started in Halle/Saale by Schmalfu beta. Loess nearly free of soil organic matter (SOM) was used as substrate and the soil formation has been studied in dependence on the level of mineral P and N fertilization. The trial consists of 48 glazed clay cylinders(empty set 40 cm x 100 cm), which are open at the bottom. The cylinders are embedded in the ground and stand on a layer of gravel. The trial is divided in a section with constant P and graduated N application and a section with constant N and graduated P application respectively. In the first 30 years, yields increased strongest in the highest NP fertilizer treatment compared with the no-N or no-P fertilizer treatment. Afterwards yields in the different fertilization treatments remained nearly constant on the reached levels. Actually the mean Shoot dry matter per year is 2.5 times higher in the highest fertilizer treatment as compared to the no-N fertilizer treatment. The C-org content in the topsoil increased over 49 years in the highest fertilized treatment from 0.18% at the beginning of the trial to 1.94%. Compared to the treatments without N or P fertilization this corresponded, however, only to a 1.2 fold increase. With higher levels offertilizer application, humus accumulation and biological activity increased relatively faster than the C-org content in the topsoil. Soil organic matter improved the nutrient availability (increase of cation exchange capacity, mobile P fractions). It is assumed that decalcification and the decrease in the C/N ratio will continue. The lower C-org and N-org contents and the lower cation exchange capacity in comparison with soils developed in-sitenear to the parent loess material suggest a still ongoing soil formation process in the trial.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/09/20 alle ore 20:27:50