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Nutrient dynamics and root health in sugarcane soils

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Bell, M. J., Garside, A.L., Moody, P. W., Pankhurst, C., Halpin, N. V. and Berthelsen, J. (2002) Nutrient dynamics and root health in sugarcane soils. In: Proceedings of the 2002 Conference of the Australian Society of Sugar Cane Technologists held at Cairns, Queensland, Australia, 29 April 2 May 2002. Australian Society of Sugar Cane Technologists.

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Article Link: https://eurekamag.com/research/003/865/003865055.p...


Research conducted by the Yield Decline Joint Venture has shown that productivity of the current sugarcane farming system can be increased significantly by soil fumigation or breaking the current monoculture. Associated with these treatments have been decreases in the numbers of cane-specific pathogens and, in most cases, an increase in beneficial biota. It has been suggested that these changes to soil biota are responsible for at least part of the recorded increases in productivity, and that the responses are mediated via improved root health. This paper examines the effect of fumigation and break treatments, from YDJV experimental sites in Queensland, Australia, on availability of essential nutrients in the soil, the relative changes in nutrient concentrations in the plant and total crop nutrient uptake. In the case of nitrogen, the increased demand associated with the growth responses has been at least partly met by treatments causing higher concentrations of mineral nitrogen in the soil solution. However, treatments have had little or no effect on the concentrations and availability of other nutrients (e.g. P, K and Si) in the soil, and increased plant uptake is attributed to an increased root surface area and a more thorough exploitation of the soil volume, i.e. a more functional root system. We propose that the ability to maintain or increase concentrations of nutrients like potassium and silicon in plant biomass may provide an index of root system functionality.

Item Type:Book Section
Subjects:Agriculture > Agriculture (General) > Soils. Soil science > Soil and crops. Soil-plant relationships. Soil productivity
Live Archive:17 Jan 2024 23:09
Last Modified:17 Jan 2024 23:09

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