A global budget for fine root biomass, surface area, and nutrient contents.

A global budget for fine root biomass, surface area, and nutrient contents. Research Abstract Details 

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A global budget for fine root biomass, surface area, and nutrient contents. Abstract Text:

R B Jackson,H A Mooney,E Schulze,

Global biogeochemical models have improved dramatically in the last decade in their representation of the biosphere. Although leaf area data are an important input to such models and are readily available globally, global root distributions for modeling water and nutrient uptake and carbon cycling have not been available. This analysis provides global distributions for fine root biomass, length, and surface area with depth in the soil, and global estimates of nutrient pools in fine roots. Calculated root surface area is almost always greater than leaf area, more than an order of magnitude so in grasslands. The average C:N:P ratio in living fine roots is 450:11:1, and global fine root carbon is more than 5% of all carbon contained in the atmosphere. Assuming conservatively that fine roots turn over once per year, they represent 33% of global annual net primary productivity.

A global budget for fine root biomass, surface area, and nutrient contents. Publishing Authors By Initials

RB Jackson,HA Mooney,E Schulze,

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A global budget for fine root biomass, surface area, and nutrient contents. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Proceedings of the National Academy of Sciences of

VOLUME: 94

Page Numbers: 7362-6

Journal Abbreviation: Proc. Natl. Acad. Sci. U.S.A.

ISSN: 0027-8424

DAY: 8

MONTH: Jul

YEAR: 1997

A global budget for fine root biomass, surface area, and nutrient contents. Information

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LANGUAGE: eng

NlmUniqueID: 7505876

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Grant and Affiliation Information for A global budget for fine root biomass, surface area, and nutrient contents.

AFFILIATION: Department of Botany, University of Texas at Austin, Austin, TX 78713.

Country: United States

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MEDLINETA: Proc Natl Acad Sci U S A

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