Nutrient Partitioning and Stoichiometry in Unburnt Sugarcane Ratoon at Varying Yield Levels

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Show simple item record Leite, J. M. Ciampitti, Ignacio A. Mariano, E. Vieira-Megda, M. X. Trivelin, P. C. O. 2016-09-20T16:59:32Z 2016-09-20T16:59:32Z
dc.description Citation: Leite, J. M., Ciampitti, I. A., Mariano, E., Vieira-Megda, M. X., & Trivelin, P. C. O. (2016). Nutrient Partitioning and Stoichiometry in Unburnt Sugarcane Ratoon at Varying Yield Levels. Frontiers in Plant Science, 7, 14. doi:10.3389/fpls.2016.00466
dc.description.abstract Unraveling nutrient imbalances in contemporary agriculture is a research priority to improve whenever possible yield and nutrient use efficiency in sugarcane (Saccharum spp.) systems while minimizing the costs of cultivation (e.g., use of fertilizers) and environmental concerns. The main goal of this study was therefore to investigate biomass and nutrient [nitrogen (N), phosphorus (P), and potassium (K)] content, partitioning, stoichiometry and internal efficiencies in sugarcane ratoon at varying yield levels. Three sites were established on highly weathered tropical soils located in the Southeast region of Brazil. At all sites, seasonal biomass and nutrient uptake patterns were synthesized from four sampling times taken throughout the sugarcane ratoon season. In-season nutrient partitioning (in diverse plant components), internal efficiencies (yield to nutrient content ratio) and nutrient ratios (N:P and N:K) were determined at harvesting. Sugarcane exhibited three distinct phases of plant growth, as follows: lag, exponential linear, and stationary. Across sites, nutrient requirement per unit of yield was 1.4 kg N. 0.24 kg P, and 2.7 kg K per Mg of stalk produced, but nutrient removal varied with soil nutrient status (based on soil plus fertilizer nutrient supply) and crop demand (potential yield). Dry leaves had lower nutrient content (N, P, and K) and broader N:P and N:K ratios when compared with tops and stalks plant fractions. Greater sugarcane yield and narrowed N:P ratio (6:1) were verified for tops of sugarcane when increasing both N and P content. High-yielding sugarcane systems were related to higher nutrient content and more balanced N:P (6:1) and N:K (0.5:1) ratios.
dc.rights Attribution 4.0 International (CC BY 4.0)
dc.subject Saccharum Spp.
dc.subject Nutrient Uptake
dc.subject Nitrogen
dc.subject Phosphorus
dc.subject Potassium
dc.subject Biomass
dc.title Nutrient Partitioning and Stoichiometry in Unburnt Sugarcane Ratoon at Varying Yield Levels
dc.type Article 2016
dc.citation.doi 10.3389/fpls.2016.00466
dc.citation.issn 1664-462X
dc.citation.jtitle Frontiers in Plant Science
dc.citation.spage 14
dc.citation.volume 7
dc.contributor.authoreid ciampitti

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Attribution 4.0 International (CC BY 4.0) Except where otherwise noted, the use of this item is bound by the following: Attribution 4.0 International (CC BY 4.0)

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