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Associations among early-season root and shoot traits, nutrient use efficiency and grain yield of spring wheat

Liu, Hui (2021). Associations among early-season root and shoot traits, nutrient use efficiency and grain yield of spring wheat. Diss. (sammanfattning/summary) Sveriges lantbruksuniv., Acta Universitatis Agriculturae Sueciae, 1652-6880
ISBN 978-91-7760-809-7
eISBN 978-91-7760-810-3
[Doctoral thesis]

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Abstract

Nutrient-efficient and high-yielding spring wheat is needed in high-latitude regions. The aims of this thesis were: (1) to evaluate the effects of soil compaction and differential weather conditions on plant growth and grain yield, (2) to identify critical nutrient elements limiting plant growth and grain yield, and (3) to identify root and shoot traits at an early growth stage (early vigor) influencing nutrient use efficiency and grain yield of spring wheat. This thesis is based on a two-year field trial and a three-week greenhouse experiment. Nine spring wheat genotypes were field-grown on compacted and non-compacted soils during two cropping seasons with contrasting weather conditions. In addition, the same genotypes were greenhousegrown for three weeks in rhizoboxes to further explore the genotype-specific associations between early vigor and nutrient accumulation. Soil compaction increased plant biomass in the drier year but decreased it in the wetter year, compared to the non-compacted treatment. In addition to nitrogen, magnesium-tophosphorus ratio co-limited total plant biomass and grain yield. Depending on the nutrient of interest, different root system traits were identified as relevant for their accumulations. Furthermore, a potential trade-off was found between nitrogen uptake efficiency and grain-specific nitrogen efficiency (i.e., grain yield per nitrogen accumulation), and it might be partly triggered by some trade-offs seen between root system traits already at an early growth stage. I emphasize that weather conditions significantly influence the interactions between compacted soil and plant growth. I suggest that the potential of early vigor to improve nutrient use efficiency and grain yield should be further investigated, together with the spatial and temporal dynamics of soil resources.

Authors/Creators:Liu, Hui
Title:Associations among early-season root and shoot traits, nutrient use efficiency and grain yield of spring wheat
Series Name/Journal:Acta Universitatis Agriculturae Sueciae
Year of publishing :2021
Number:2021:66
Number of Pages:57
Publisher:Department of Crop Production Ecology, Swedish University of Agricultural Sciences
ISBN for printed version:978-91-7760-809-7
ISBN for electronic version:978-91-7760-810-3
ISSN:1652-6880
Language:English
Publication Type:Doctoral thesis
Article category:Other scientific
Version:Published version
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Botany
(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Food Science
Keywords:early vigor, nutrient use efficiency, roots, soil compaction, spring wheat
URN:NBN:urn:nbn:se:slu:epsilon-p-113666
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-113666
ID Code:25480
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Crop Production Ecology
Deposited By: SLUpub Connector
Deposited On:22 Sep 2021 11:24
Metadata Last Modified:23 Sep 2021 09:50

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