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https://hdl.handle.net/1959.11/29558
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DC Field | Value | Language |
---|---|---|
dc.contributor.author | Mclachlan, Jonathan W | en |
dc.contributor.author | Haling, Rebecca E | en |
dc.contributor.author | Simpson, Richard J | en |
dc.contributor.author | Li, Xiaoxi | en |
dc.contributor.author | Flavel, Richard J | en |
dc.contributor.author | Guppy, Chris N | en |
dc.date.accessioned | 2020-10-21T01:27:52Z | - |
dc.date.available | 2020-10-21T01:27:52Z | - |
dc.date.issued | 2019 | - |
dc.identifier.citation | Crop and Pasture Science, 70(11), p. 1015-1032 | en |
dc.identifier.issn | 1836-5795 | en |
dc.identifier.issn | 1836-0947 | en |
dc.identifier.uri | https://hdl.handle.net/1959.11/29558 | - |
dc.description.abstract | <i>Trifolium subterraneum</i> L. is widely grown in the phosphorus (P) deficient soils of southern Australia. However, this pasture legume has a high critical external P requirement and requires frequent applications of P fertiliser to achieve high productivity. Twenty-six genotypes of <i>T. subterraneum</i> were grown to determine: (<i>i</i>) differences in shoot growth and P acquisition under low-P supply; (<i>ii</i>) the root morphological traits important for P acquisition; and (<i>iii</i>) the feasibility of selection among genotypes for these root morphological traits. Micro-swards of each genotype were grown with a topsoil layer that was either moderately P-deficient or had P supplied in excess of the critical requirement for maximum yield; the subsoil layer was P-deficient. Yield and P content of shoots and roots were determined after 5 weeks’ growth, and root samples were assessed for diameter, length and root hair length. All genotypes were equally highly productive when excess P was supplied. However, relative shoot yield in the moderately P-deficient soil ranged from 38-71%. Total root length ranged from 63-129 m pot<sup>-1</sup>, and was correlated with total plant P uptake (R<sup>2</sup> = 0.78, <i>P</i> < 0.001). Variation was also observed in average root diameter (0.29-0.36 mm) and root hair length (0.19-0.33 mm). These traits were combined with root length to calculate the total surface area of the root hair cylinder, which was also correlated with total plant P uptake (R<sup>2</sup> = 0.69, <i>P</i> < 0.001). The results demonstrated that there was significant variation in P acquisition efficiency and shoot yield among genotypes of <i>T. subterraneum</i> when grown in P-deficient soil, and that root length was important for improved P uptake. The results indicate potential to identify superior genotypes that achieve improved P acquisition and higher shoot yields in low-P soil. | en |
dc.language | en | en |
dc.publisher | CSIRO Publishing | en |
dc.relation.ispartof | Crop and Pasture Science | en |
dc.title | Variation in root morphology and P acquisition efficiency among Trifolium subterraneum genotypes | en |
dc.type | Journal Article | en |
dc.identifier.doi | 10.1071/CP19078 | en |
local.contributor.firstname | Jonathan W | en |
local.contributor.firstname | Rebecca E | en |
local.contributor.firstname | Richard J | en |
local.contributor.firstname | Xiaoxi | en |
local.contributor.firstname | Richard J | en |
local.contributor.firstname | Chris N | en |
local.subject.for2008 | 070306 Crop and Pasture Nutrition | en |
local.subject.for2008 | 070303 Crop and Pasture Biochemistry and Physiology | en |
local.subject.for2008 | 050304 Soil Chemistry (excl. Carbon Sequestration Science) | en |
local.subject.seo2008 | 830406 Sown Pastures (excl. Lucerne) | en |
local.profile.school | School of Environmental and Rural Science | en |
local.profile.school | School of Environmental and Rural Science | en |
local.profile.school | School of Environmental and Rural Science | en |
local.profile.school | School of Environmental and Rural Science | en |
local.profile.email | jmclach7@une.edu.au | en |
local.profile.email | rhaling@une.edu.au | en |
local.profile.email | rflavel3@une.edu.au | en |
local.profile.email | cguppy@une.edu.au | en |
local.output.category | C1 | en |
local.record.place | au | en |
local.record.institution | University of New England | en |
local.publisher.place | Australia | en |
local.format.startpage | 1015 | en |
local.format.endpage | 1032 | en |
local.identifier.scopusid | 85075816532 | en |
local.peerreviewed | Yes | en |
local.identifier.volume | 70 | en |
local.identifier.issue | 11 | en |
local.contributor.lastname | Mclachlan | en |
local.contributor.lastname | Haling | en |
local.contributor.lastname | Simpson | en |
local.contributor.lastname | Li | en |
local.contributor.lastname | Flavel | en |
local.contributor.lastname | Guppy | en |
dc.identifier.staff | une-id:jmclach7 | en |
dc.identifier.staff | une-id:rhaling | en |
dc.identifier.staff | une-id:rflavel3 | en |
dc.identifier.staff | une-id:cguppy | en |
local.profile.orcid | 0000-0003-0592-4424 | en |
local.profile.orcid | 0000-0001-7867-2104 | en |
local.profile.orcid | 0000-0001-7274-607X | en |
local.profile.role | author | en |
local.profile.role | author | en |
local.profile.role | author | en |
local.profile.role | author | en |
local.profile.role | author | en |
local.profile.role | author | en |
local.identifier.unepublicationid | une:1959.11/29558 | en |
local.date.onlineversion | 2019-11-29 | - |
dc.identifier.academiclevel | Academic | en |
dc.identifier.academiclevel | Academic | en |
dc.identifier.academiclevel | Academic | en |
dc.identifier.academiclevel | Academic | en |
dc.identifier.academiclevel | Academic | en |
dc.identifier.academiclevel | Academic | en |
local.title.maintitle | Variation in root morphology and P acquisition efficiency among Trifolium subterraneum genotypes | en |
local.relation.fundingsourcenote | Australian Government Department of Agriculture and Water Resources; Meat and Livestock Australia; Dairy Australia; Australian Wool Innovations Ltd | en |
local.output.categorydescription | C1 Refereed Article in a Scholarly Journal | en |
local.search.author | Mclachlan, Jonathan W | en |
local.search.author | Haling, Rebecca E | en |
local.search.author | Simpson, Richard J | en |
local.search.author | Li, Xiaoxi | en |
local.search.author | Flavel, Richard J | en |
local.search.author | Guppy, Chris N | en |
local.uneassociation | Yes | en |
local.atsiresearch | No | en |
local.sensitive.cultural | No | en |
local.identifier.wosid | 000501803100010 | en |
local.year.available | 2019 | en |
local.year.published | 2019 | en |
local.fileurl.closedpublished | https://rune.une.edu.au/web/retrieve/da5384a1-8773-431c-a96b-c98e74ff8ece | en |
local.subject.for2020 | 300407 Crop and pasture nutrition | en |
local.subject.for2020 | 300404 Crop and pasture biochemistry and physiology | en |
local.subject.for2020 | 410604 Soil chemistry and soil carbon sequestration (excl. carbon sequestration science) | en |
local.subject.seo2020 | 100505 Sown pastures (excl. lucerne) | en |
Appears in Collections: | Journal Article School of Environmental and Rural Science |
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