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Titolo:
Interactive effects of management practices on water-stable aggregation and organic matter of a Humic Gleysol
Autore:
Bissonnette, N; Angers, DA; Simard, RR; Lafond, J;
Indirizzi:
Agr & Agri Food Canada, Soils & Crops Res & Dev Ctr, St Foy, PQ G1V 2J3, Canada Agr & Agri Food Canada St Foy PQ Canada G1V 2J3 t Foy, PQ G1V 2J3, Canada Agr & Agri Food Canada, Expt Farm, Normandin, PQ G8M 4K3, Canada Agr & Agri Food Canada Normandin PQ Canada G8M 4K3 in, PQ G8M 4K3, Canada
Titolo Testata:
CANADIAN JOURNAL OF SOIL SCIENCE
fascicolo: 5, volume: 81, anno: 2001,
pagine: 545 - 551
SICI:
0008-4271(200111)81:5<545:IEOMPO>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
MICROBIAL BIOMASS; SOIL; TILLAGE; CARBON; PARTICULATE; SYSTEMS; FIELDS; CROPS; CORN;
Keywords:
cropping systems; total soil C; microbial biomass; carbohydrate; alkaline phosphatase; soil aggregation; liquid dairy manure; reduced tillage; rotations;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
26
Recensione:
Indirizzi per estratti:
Indirizzo: Bissonnette, N Agr & Agri Food Canada, Soils & Crops Res & Dev Ctr, 2560 Hochelaga Blvd, St Foy, PQ G1V 2J3, Canada Agr & Agri Food Canada 2560 Hochelaga Blvd St Foy PQ Canada G1V 2J3
Citazione:
N. Bissonnette et al., "Interactive effects of management practices on water-stable aggregation and organic matter of a Humic Gleysol", CAN J SOIL, 81(5), 2001, pp. 545-551

Abstract

In many soils, the content and quality of organic matter (OM) control water-stable aggregation, which in turn preserves soil surface integrity. The effects of management practices on soil OM and aggregation remain to be determined for certain soils and climatic conditions. We assessed the effects of eight management systems involving two crop sequences: [barley (Hordeum vulgare L.) monoculture (M) and barley in rotation (R) with a forage mix of red clover (Trifolium pratense L.) and timothy (Phleum pratense L. 'Champ')], two fall tillage [moldboard plowing (MP) and chisel plowing (CP)] and two nutrient sources [liquid dairy manure (LDM) and mineral fertilizers (MIN)] on soil aggregation and OM fractions of a silty clay Humic Gleysol. Soil samples from the 0-7.5 cm layer were taken periodically during 7 yr, and the total C and N, microbial biomass C (MBC) and carbohydrate (AHC) contents,alkaline phosphatase activity (APA), and water-stable aggregation were determined. By the 7th yr, initial total C and N contents of the surface soil had increased by 35 and 45%, respectively, in R-CP-LDM. They were slightly increased in R-CP-MIN and R-MP-LDM, whereas they decreased by an average of19% in R-MP-MIN and all monoculture plots. Increases in C contents were attributed to higher annual C inputs from forage residues and LDM, less frequent tillage in the rotation, and shallower tillage with CP. The MBC, APA, AHC and aggregation generally responded faster and to a greater degree to conservation management practices than total C and N. Overall, conservation tillage and manure applications resulted in greater improvement in surface soil conditions when used in a rotation system rather than in a monoculture. The rapid rate of changes in soil properties suggests that the surface quality of this cold silty clay soil can be improved relatively quickly with selected management combinations.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/11/20 alle ore 00:08:14