NDLI: Functional Relationship Between Sugarcane Root Biomass and Length for Cropping System Applications

Content Provider	Springer Nature Link
Author	Chopart, J. L. Azevedo, M. C. B. Mézo, L. Marion, D.
Copyright Year	2011
Abstract	Sugarcane root length density (RLD, m/m$^{3}$) and root biomass are key characteristics for respectively determining: (i) the crop nutrient and water uptake capacity, and (ii) carbon partitioning in plants and balance in soil. In previous studies, often only one of these parameters was measured. It is therefore useful to link the RLD and root biomass density (RBD, g/m$^{3}$) to evaluate one parameter in relation to the other. Relationships between RLD and RBD and specific root length (SRL, m/g) were studied in Côte d’Ivoire and Réunion. Mean SRLs of fine roots were independent of the root location in the soil profile and plant age but higher in Côte d’Ivoire (68 m/g, SD = 19) than in Réunion (35 m/g, SD = 10). The best fit between the RBD and RLD of thick roots was a power function (RLD = 21.3 RBD$^{0.745}$; R $^{2}$ = 0.85). Mean SRL was 7 m/g. When all roots were studied together, the best fit between RBD and RLD was also a power function, with little variation between the two sites or between plant and ratoon sugarcane. The fits calculated with all data except those obtained very close to the plant stem were: RLD = 85.5 RBD$^{0.742}$ (R $^{2}$ = 0.88) and mean SRL = 27 m/g (SD = 13). Relationships between root length and biomass were neither fixed nor fully random. Due to SRL variability, it was hard to pinpoint any mechanistic links between root length and biomass. Conversely, for simple field evaluations, a rough and ready RLD estimate can be made on the basis of RBD, and vice versa.
Starting Page	317
Ending Page	321
Page Count	5
File Format	PDF
ISSN	09721525
Journal	Sugar Tech
Volume Number	12
Issue Number	3-4
e-ISSN	09740740
Language	English
Publisher	Springer-Verlag
Publisher Date	2011-02-15
Publisher Place	India
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Specific root length Root length density Root model Réunion Côte d’Ivoire Agriculture
Content Type	Text
Resource Type	Article
Subject	Agronomy and Crop Science

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