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Titolo:
SOIL ORGANIC-MATTER QUALITY AS INFLUENCED BY TILLAGE, LIME, AND PHOSPHORUS
Autore:
SIMARD RR; ANGERS DA; LAPIERRE C;
Indirizzi:
AGR CANADA,RES STN,2560 HOCHELAGA BLVD ST FOY G1V 2J3 PQ CANADA
Titolo Testata:
Biology and fertility of soils
fascicolo: 1, volume: 18, anno: 1994,
pagine: 13 - 18
SICI:
0178-2762(1994)18:1<13:SOQAIB>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
MICROBIAL BIOMASS; NITROGEN-MINERALIZATION; FERTILIZER MANAGEMENT; BARLEY PRODUCTION; ENZYME-ACTIVITIES; REDUCED TILLAGE; HUMID CLIMATE; ZERO TILLAGE; NO-TILLAGE; ROTATION;
Keywords:
SOIL ORGANIC MATTER; N-MINERALIZATION POTENTIAL; MICROBIAL BIOMASS-C; GLEYSOL; REDUCED TILLAGE; MOLDBOARD PLOWING; BARLEY CROPPING;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
50
Recensione:
Indirizzi per estratti:
Citazione:
R.R. Simard et al., "SOIL ORGANIC-MATTER QUALITY AS INFLUENCED BY TILLAGE, LIME, AND PHOSPHORUS", Biology and fertility of soils, 18(1), 1994, pp. 13-18

Abstract

In Eastern Canada, cereal yields are often restricted by soil acidityand low fertility. Continuous cereal production can also lead to soilstructural degradation. The addition of lime and fertilizers and the adoption of conversation tillage practices are proposed solutions which may have a positive impact on soil quality. The objective of the present work was to assess the impact of 3 years of different tillage practices and P additions, and of a single lime addition on organic C andtotal N, microbial biomass C, and on N mineralization at the surface layer (0-7.5 cm) of a Courval sandy clay loam (Humic Gleysol). The easily mineralizable N, total amount of N mineralized in 22.1 weeks, the rate of N mineralization, and microbial biomass C were significantly greater in the minimum tillage than in the moldboard plow treatment. Chisel plow treatment showed intermediate values. The ratios of potentially mineralizable N and of easily mineralizable to total soil N were also significantly larger under minimum tillage and chisel plowing thanunder moldboard plowing. The lime and P treatments had no significanteffect on the measured soil quality parameters. The total amount of Nmineralized per unit of biomass C decreased as the tillage intensity increased, suggesting a decrease in the efficiency of the biomass in transforming organic N into potentially plant-available forms and thus a loss in soil organic matter quality. The results of this study indicate that conservation tillage practices such as rototilling and chiselplowing are efficient ways of maintaining soil organic matter qualitywhen old pastures are brought back into cultivation.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/12/20 alle ore 19:29:33