دورية أكاديمية
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Can seasonal soil N mineralisation trends be leveraged to enhance pasture growth?

التفاصيل البيبلوغرافية
العنوان: Can seasonal soil N mineralisation trends be leveraged to enhance pasture growth?
المؤلفون: Bilotto F; Tasmanian Institute of Agriculture, University of Tasmania, 16-20 Mooreville Rd, Burnie, Australia., Harrison MT; Tasmanian Institute of Agriculture, University of Tasmania, 16-20 Mooreville Rd, Burnie, Australia. Electronic address: matthew.harrison@utas.edu.au., Migliorati MA; Centre for Agriculture and the Bioeconomy, Queensland University of Technology, 2 George St, Brisbane, QLD 4000, Australia; Science and Technology Division, Queensland Department of Environment and Science, EcoSciences Precinct, 41 Boggo Rd, Dutton Park, QLD 4102, Australia., Christie KM; Tasmanian Institute of Agriculture, University of Tasmania, 16-20 Mooreville Rd, Burnie, Australia., Rowlings DW; Centre for Agriculture and the Bioeconomy, Queensland University of Technology, 2 George St, Brisbane, QLD 4000, Australia., Grace PR; Centre for Agriculture and the Bioeconomy, Queensland University of Technology, 2 George St, Brisbane, QLD 4000, Australia., Smith AP; School of Veterinary and Animal Science, University of Melbourne, Parkville 3010, Victoria, Australia; ICRISAT, Patancheru, 502 324, Telangana, India., Rawnsley RP; Tasmanian Institute of Agriculture, University of Tasmania, 16-20 Mooreville Rd, Burnie, Australia., Thorburn PJ; CSIRO, Agriculture and Food, Brisbane, Australia., Eckard RJ; School of Veterinary and Animal Science, University of Melbourne, Parkville 3010, Victoria, Australia.
المصدر: The Science of the total environment [Sci Total Environ] 2021 Jun 10; Vol. 772, pp. 145031. Date of Electronic Publication: 2021 Feb 02.
نوع المنشور: Journal Article
اللغة: English
بيانات الدورية: Publisher: Elsevier Country of Publication: Netherlands NLM ID: 0330500 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1879-1026 (Electronic) Linking ISSN: 00489697 NLM ISO Abbreviation: Sci Total Environ Subsets: PubMed not MEDLINE; MEDLINE
أسماء مطبوعة: Original Publication: Amsterdam, Elsevier.
مستخلص: Background: Soil N mineralisation is the process by which organic N is converted into plant-available forms, while soil N immobilisation is the transformation of inorganic soil N into organic matter and microbial biomass, thereafter becoming bio-unavailable to plants. Mechanistic models can be used to explore the contribution of mineralised or immobilised N to pasture growth through simulation of plant, soil and environment interactions driven by management.
Purpose: Our objectives were (1) to compare the performance of three agro-ecosystems models (APSIM, DayCent and DairyMod) in simulating soil N, pasture biomass and soil water using the same experimental data in three diverse environments (2), to determine if tactical application of N fertiliser in different seasons could be used to leverage seasonal trends in N mineralisation to influence pasture growth and (3), to explore the sensitivity of N mineralisation to changes in N fertilisation, cutting frequency and irrigation rate.
Key Results: Despite considerable variation in model sophistication, no model consistently outperformed the other models with respect to simulation of soil N, shoot biomass or soil water. Differences in the accuracy of simulated soil NH 4 and NO 3 were greater between sites than between models and overall, all models simulated cumulative N 2 O well. While tactical N application had immediate effects on NO 3 , NH 4 , N mineralisation and pasture growth, no long-term relationship between mineralisation and pasture growth could be discerned. It was also shown that N mineralisation of DayCent was more sensitive to N fertiliser and cutting frequency compared with the other models.
Major Conclusions: Our results suggest that while superfluous N fertilisation generally stimulates immobilisation and a pulse of N 2 O emissions, subsequent effects through N mineralisation/immobilisation effects on pasture growth are variable. We suggest that further controlled environment soil incubation research may help separate successive and overlapping cycles of mineralisation and immobilisation that make it difficult to diagnose long-term implications for (and associations with) pasture growth.
Competing Interests: Declaration of competing interest Nil.
(Copyright © 2021 The Authors. Published by Elsevier B.V. All rights reserved.)
فهرسة مساهمة: Keywords: Ammonium; Fertilisation; Immobilisation; Mineralisation; Model intercomparison; Nitrate; Nitrogen dynamics; Nitrogen fertilisation; Pasture production; Soil nitrogen turnover
تواريخ الأحداث: Date Created: 20210212 Date Completed: 20210325 Latest Revision: 20210325
رمز التحديث: 20231215
DOI: 10.1016/j.scitotenv.2021.145031
PMID: 33578140
قاعدة البيانات: MEDLINE
الوصف
تدمد:1879-1026
DOI:10.1016/j.scitotenv.2021.145031