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| Web URL(s): | http://www.nrcresearchpress.com/doi/abs/10.4141/P01-139#.VuHAm_krJpg
Last checked: 03/10/2016
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| Publication Type:
| Refereed |
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| Author(s): | Bolinder, M. A.;
Angers, D. A.;
Bélanger, G.;
Michaud, R.;
Laverdière, M. R. |
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| Author Affiliation: | Bolinder, Angers, Bélanger, and Michaud: Agriculture et Agroalimentaire Canada, Centre de recherche et de développement sur les sols et les grandes cultures, Sainte-Foy Québec, Canada; Bolinder and Laverdière: Département des sols et de génie agroalimentaire, Université Laval, Sainte-Foy Québec, Canada |
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| Title: | Root biomass and shoot to root ratios of perennial forage crops in eastern Canada |
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| Section: | Agronomy Section: Forage
Other records with the "Agronomy Section: Forage" Section
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| Source: | Canadian Journal of Plant Science. Vol. 82, No. 4, October 2002, p. 731-737. |
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| Publishing Information: | Ottawa: Agricultural Institute of Canada |
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| # of Pages: | 7 |
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| Keywords: | TIC Keywords: Root-shoot ratio; Forage crops; Biomass; Carbon; Organic matter
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| Geographic Terms: | Eastern Canada |
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| Abstract/Contents: | "Shoot to root ratios (S:R) at peak standing crop are commonly used to estimate the annual crop residue C inputs to the soil from the root biomass left in the soil at harvest. However, root biomass has often been neglected in field studies and estimates of S:R for many commonly grown forage species are not available. Our objective was to determine root biomass and S:R of seven perennial grass species and two perennial legume species under eastern Canadian soil and climatic conditions. Root biomass in three soil layers (0-15, 15-30 and 30-45 cm) was measured shortly after the second harvest in the first (1995) and second (1996) year of production. Two harvests of aboveground DM were taken each year. The total root biomass (0-45 cm) in the second year of production (average of 1437 g m-2) was twice that measured in the first year of production (average of 683 g m-2). This temporal variation was mainly explained by the increase of root biomass in the 0- to 15-cm layer. The proportion of total root biomass (0-45 cm) in the 0- to 15-cm layer increased from 54 to 71% while that in the 15- to 30-cm layer decrased from 37 to 21%; the proportion of roots in the 30- to 45-cm layer remained constant at about 10% in both years. The S:R of alfalfa for the 0-15 cm depth was significantly higher than that for most of the grasses. No significant difference in S:R was observed among grass species. Recognizing that S:R may vary with locations and climatic conditions, our results suggest that average S:R of about 1.30 (values ranged from 1.01 to 1.72) in the first production year and 0.60 (values ranged from 0.43 to 0.87) in the second production year could be used as a first approximation to estimate the amount of root biomass left in the soil to a depth of 45 cm from forage crops in eastern Canada. The S:R of forage crops, particularly grasses, were lower than those of annual crops such as small-grain cereals and corn." |
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| Language: | English |
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| References: | 48 |
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| Note: | Tables
Graphs
Abstract also appears in French |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Bolinder, M. A., D. A. Angers, G. Bélanger, R. Michaud, and M. R. Laverdière. 2002. Root biomass and shoot to root ratios of perennial forage crops in eastern Canada. Can. J. Plant Sci. 82(4):p. 731-737. |
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| Web URL(s):
http://www.nrcresearchpress.com/doi/abs/10.4141/P01-139#.VuHAm_krJpg
Last checked: 03/10/2016
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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MSU catalog number: SB 1 .C3 |
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