2019 Wang et al. Biol Fert Soil 55,649.pdf (570.59 kB)
Allelopathic effects account for the inhibitory effect of field-pea (Pisum sativum L.) shoots on wheat growth in dense clay subsoils
Version 2 2023-08-30, 06:27Version 2 2023-08-30, 06:27
Version 1 2021-02-10, 03:44Version 1 2021-02-10, 03:44
journal contribution
posted on 2021-02-10, 03:43 authored by Xiaojuan WangXiaojuan Wang, Peter SalePeter Sale, Zhiqian Liu, Roger ArmstrongRoger Armstrong, Simone RochfortSimone Rochfort, Caixian TangCaixian Tang© 2019, Springer-Verlag GmbH Germany, part of Springer Nature. The deep-placement of nutrient-rich organic amendments in poorly-structured subsoils can improve subsoil structure and increase grain yields, but its widespread adoption by farmers is limited by the availability and cost of animal manures, the current choice of amendment. Three glasshouse experiments investigated the effectiveness of dried field pea (Pisum sativum L.) shoots (green chop), as green manure, on wheat growth in three subsoils with contrasting soil chemical and physical properties. The growth of wheat plants was greatly suppressed when the green chop was placed in Sodosol and Chromosol subsoils. In contrast, there was a twofold increase in shoot biomass in response to the addition of green chop to Vertosol. Three allelopathic compounds, pisatin, anhydropisatin, and maackian, were identified at higher concentrations in the extracts of remaining green chop residues in the Sodosol and Chromosol, compared to the Vertosol, directly supporting phytotoxicity as the cause of observed inhibitory effects of green chop in these soils. The persistence of the phytotoxicity in the Sodosol might be attributed to its poor aeration caused by poor structure or compaction. Nevertheless, pre-incubation led to microbial decomposition of the allelochemicals in the Sodosol, though at a much slower rate than in the Vertosol. Further studies are needed to determine the time period required for the disappearance of the phytotoxic effects in soils with different physico-chemical properties.
Funding
This research was supported under Grains Research and Development Corporation Projects funding scheme (project DAV00149).
History
Publication Date
2019-07-12Journal
Biology and Fertility of SoilsVolume
55Issue
7Pagination
11p. (p. 649-659)Publisher
Springer NatureISSN
0178-2762Rights Statement
The Author reserves all moral rights over the deposited text and must be credited if any re-use occurs. Documents deposited in OPAL are the Open Access versions of outputs published elsewhere. Changes resulting from the publishing process may therefore not be reflected in this document. The final published version may be obtained via the publisher’s DOI. Please note that additional copyright and access restrictions may apply to the published version.Publisher DOI
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