Mineralisation of catch crop residues and N transfer to the subsequent crop

Vogeler, Iris; Böldt, Matthias; Taube, F.

doi:10.1016/j.scitotenv.2021.152142

Cited by 14 publications

(7 citation statements)

References 47 publications

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“…Closing the nitrogen (N) cycle of arable cropping systems is one of the most relevant advantages of cover crops under European conditions. By storing N in the above-and below-ground biomass over winter months, cover crops prevent N leaching losses [1,[5][6][7][8]. A recent meta-analysis estimated a global reduction in N leaching by 69 % across all species compared to fallow [3].…”

Section: Introductionmentioning

confidence: 99%

“…After termination, N from cover crop biomass might be supplied to succeeding spring cash crops, i.e., maize. The amount of additional N supply to subsequent crops strongly depends on the total N amount, the chemical composition (C/N ratio), and on the duration of decomposition and the resulting mineralisation/immobilisation of N [5]. For cover crop residues with wide C/N ratios, the subsequent N supply can be delayed or reduced [8,9].…”

Section: Introductionmentioning

confidence: 99%

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Estimation of Biomass and N Uptake in Different Winter Cover Crops from UAV-Based Multispectral Canopy Reflectance Data

et al. 2022

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Cover crops are known to provide beneficial effects to agricultural systems such as a reduction in nitrate leaching, erosion control, and an increase in soil organic matter. The monitoring of cover crops’ growth (e.g., green area index (GAI), nitrogen (N) uptake, or dry matter (DM)) using remote sensing techniques allows us to identify the physiological processes involved and to optimise management decisions. Based on the data of a two-year trial (2018, 2019) in Kiel, Northern Germany, the multispectral sensor Sequoia (Parrot) was calibrated to the selected parameters of the winter cover crops oilseed radish, saia oat, spring vetch, and winter rye as sole cover crops and combined in mixtures. Two simple ratios (SRred, SRred edge) and two normalised difference indices (NDred, NDred edge) were calculated and tested for their predicting power. Furthermore, the advantage of the species/mixture–individual compared to the universal models was analysed. SRred best predicted GAI, DM, and N uptake (R2: 0.60, 0.53, 0.45, respectively) in a universal model approach. The canopy parameters of saia oat and spring vetch were estimated by species–individual models, achieving a higher R2 than with the universal model. Comparing mixture–individual models to the universal model revealed low relative error differences below 3%. The findings of the current study serve as a tool for the rapid and inexpensive estimation of cover crops’ canopy parameters that determine environmental services.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Estimation of Biomass and N Uptake in Different Winter Cover Crops from UAV-Based Multispectral Canopy Reflectance Data

et al. 2022

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“…Zo heeft de maatregel geen effect in bodems met hoge grondwaterstanden, waar door denitrificatie de nitraatconcentraties in grondwater heel laag zijn. Ook minder duidelijk is het effect van de vanggewassen op stikstofvoorziening in opvolgende gewassen (Thomsen & Christensen, 1999;Bernsten et al, 2006;Komainda et al, 2018;Vogeler et al, 2022) en op de gevolgen voor de nitraatuitspoeling op lange termijn (Constantin et al, 2012). Zo berekenden Constantin et al (2012) dat jaarlijks herhaalde teelt van vanggewassen leidt tot extra stikstofmineralisatie en dat het alleen tot minder nitraatuitspoeling leidt als hierbij rekening wordt gehouden met de stikstofbemesting c.q.…”

Section: Aanbevelingenunclassified

“…Met name bij grasachtige vanggewassen en klavers is het een substantiële hoeveelheid die kan oplopen tot 20-30 kg N per ha (Schröder, 1997). Andere mechanismen die een rol zouden kunnen spelen zijn een hogere denitrificatie in de bodem (Heinen, 2006;Jahangir et al, 2014) en daardoor meer verlies van stikstof naar de lucht in plaats van naar het grondwater en/of optreden van N-immobilisatie in de bodem door de teelt van vanggewassen (Vos & Van der Putten, 2001;Vogeler et al, 2022).…”

Section: Aanbevelingenunclassified

Effect N-vanggewassen na snijmaïs op zandgrond op de nitraatuitspoeling : Verslag van vierjarig veldonderzoek op zuidelijk zandgrond te Vredepeel

van Geel,

Rietra,

Verstegen

et al. 2024

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“…The rate of N release from decomposing residues is governed by the balance between the processes of mineralisation and immobilisation, which depends on the composition of the residues, particularly their C:N ratio. Net mineralisation will occur when the C:N ratio is below a critical value, whereas net immobilisation of N may occur when the critical value is exceeded Trinsoutrot et al 2000;Vogeler et al 2022). However, this critical value exists as a range that is probably related to variation in the C:N ratio of the decomposing microbial biomass as well as the existence of organic components with different susceptibilities to decomposition in the various crop residues (Cabrera et al 2005) This study aimed to identify factors that explain variability in (1) the decomposition rate of residues of commonly grown vegetable crops, (2) the contribution of vegetable crop residues to mineral N supply via mineralisation, and (3) the relationship between the biochemical composition of the vegetable crop residues and decomposition/mineralisation.…”

Section: Introductionmentioning

confidence: 99%

Decomposition and nitrogen dynamics in vegetable crop residues with contrasting biochemical composition

Peterson

Curtin²,

Fraser³

et al. 2023

Preprint

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Aim To improve nitrogen (N) use efficiency in vegetable-growing systems, the characteristics of N-release from vegetable crop residues needs to be better understood. This study aimed to quantify the decomposition rate and the contribution of decomposition to mineral N supply from residues of commonly grown vegetable crops. Methods The rate of decomposition and N release from nine vegetable residues was quantified in a laboratory incubation with barley straw included for comparison. Dried and ground residue material was incorporated into soil at a rate of 1% w/w and incubated at 90% of field capacity for 118 days at 15°C. CO2 production and soil mineral N concentrations were determined periodically during the incubation. Results Decomposition of the vegetable residues was rapid, with 29–46% of residue-C respired as CO2 in the first week of incubation (vs 10% of barley straw C). The decomposition data fitted an exponential decay model with evidence of fast and slow pools of decomposable-C in all residues. The effect of residue addition to soil ranged from N immobilisation to net N mineralisation over the course of the incubation with the proportion of N released or immobilised linearly related to residue total N. Conclusions With residue total N and residue-soil contact time as input variables, a simple model provided good predictions of N release from vegetable crop residues under controlled conditions in the laboratory. It is important however, that our predicted residue N release rates be validated under field conditions before being used to guide N use decisions.

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Mineralisation of catch crop residues and N transfer to the subsequent crop

Cited by 14 publications

References 47 publications

Estimation of Biomass and N Uptake in Different Winter Cover Crops from UAV-Based Multispectral Canopy Reflectance Data

Estimation of Biomass and N Uptake in Different Winter Cover Crops from UAV-Based Multispectral Canopy Reflectance Data

Effect N-vanggewassen na snijmaïs op zandgrond op de nitraatuitspoeling : Verslag van vierjarig veldonderzoek op zuidelijk zandgrond te Vredepeel

Decomposition and nitrogen dynamics in vegetable crop residues with contrasting biochemical composition

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