The distribution of soil micro-nutrients and the effects on herbage micro-nutrient uptake and yield in three different pasture systems

A - Papers appearing in refereed journals

Thomas, C. L., Darch, T., Harris, P., Beaumont, D. A. and Haefele, S. M. 2021. The distribution of soil micro-nutrients and the effects on herbage micro-nutrient uptake and yield in three different pasture systems. Agronomy. 11 (9), p. 1731. https://doi.org/10.3390/agronomy11091731

AuthorsThomas, C. L., Darch, T., Harris, P., Beaumont, D. A. and Haefele, S. M.
Abstract

Pasture micro-nutrient concentrations are often deficient for herbage productivity and the health of livestock. The aim of this study was to investigate soil and herbage micro-nutrient content and the effects on yield on the three pasture systems of the North Wyke Farm Platform (NWFP): high-sugar grass + legume mix minus nitrogen (N) fertilizer (blue/HSG + L); permanent pasture plus N fertilizer (green/P + N); high-sugar grass plus N fertilizer (red/HSG + N). The locations with high soil total micro-nutrient concentrations had a greater slope and higher soil organic matter (SOM) content. Herbage micro-nutrient concentrations were often greater at the locations with high soil total micro-nutrient concentrations. The concentration and uptake of nearly all mi-cro-nutrients was greatest in the herbage of the green/P + N system, which had the highest SOM content, whereas they were often lowest in the red/HSG + N system, which had the lowest SOM and the highest yield, indicating biomass dilution of micro-nutrients in the herbage. At the loca-tions with high soil micro-nutrient concentrations, yield was higher than at locations with low micro-nutrient concentrations, and was equal across the three pasture systems, regardless of fertilizer N treatment. Variation in micro-nutrient uptake/yield in the blue grass–legume system was predominantly explained by the soil molybdenum (Mo) concentration, possibly relating to the requirement for Mo in biological nitrogen fixation. There was, therefore, a trade-off in ploughing and re-seeding for higher yield, with the maintenance of SOM being important for herbage micro-nutrient content.

KeywordsMicro-nutrients; Uptake; Yield; Legumes; SOM
Year of Publication2021
JournalAgronomy
Journal citation11 (9), p. 1731
Digital Object Identifier (DOI)https://doi.org/10.3390/agronomy11091731
Open accessPublished as ‘gold’ (paid) open access
FunderBiotechnology and Biological Sciences Research Council
Funder project or codeS2N - Soil to Nutrition - Work package 1 (WP1) - Optimising nutrient flows and pools in the soil-plant-biota system
S2N - Soil to Nutrition - Work package 2 (WP2) - Adaptive management systems for improved efficiency and nutritional quality
The North Wyke Farm Platform- National Capability [2017-22]
Publisher's version
Output statusPublished
Publication dates
Online29 Aug 2021
Publication process dates
Accepted26 Aug 2021
PublisherMDPI
ISSN2073-4395

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