Optimisation de la fumure soufrée par estimation du risque de carence

Pellet, Didier; Mercier, Edith; Ballestra, Ursula; Keiser, Andreas (2003). Optimisation de la fumure soufrée par estimation du risque de carence Revue suisse d'agriculture, 35(4), pp. 161-167. Agroscope

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The experimental results of four growing seasons (1999-2002) were analysed to im-prove a prediction model of sulphur deficiency for winter oilseed rape previously pre-sented in the «DBF 2001» (RYSER et al., 2001). This scoring model based on agrono-mic pedologic and climatic criteria explained 85% of yield variability in response to sulphur fertilisation. In order of importance, the parameters of the model were soil depth, clay content, organic matter and plant-available nitrogen. Moreover, rainfall between October to March, stone content and frequency of organic fertiliser applica-tions were also taken into account. The risk of deficiency was divided into 3 catego-ries. The threshold for low risk was set at a score of 24 points and no S fertilisation was required for oilseed rape grown at low risk sites. The optimum S application of the medium risk with a score from 15 to 23 points was determined at 35 kg S/ha. The high risk of deficiency (score under 15 points) was not represented in the experiment but a proposition of fertilisation as high as 60 kg S/ha has been made. The effects of S fertilisation on total S uptake in the aerial biomass and quality of the harvested grains were also evaluated. A significant increase of total S uptake in response to S fertilisa-tion was observed. Besides, the glucosinolates concentration in the grains also increa-sed significantly with S application for all cases of moderate risk and for 3 out of 6 cases at low risk sites. Finally, sulphur had a positive influence on seed oil content of 4 out of 9 cases of moderate risk and no effect on the low risk sites.

Item Type:

Journal Article (Original Article)

Division/Institute:

School of Agricultural, Forest and Food Sciences HAFL
School of Agricultural, Forest and Food Sciences HAFL > Agriculture
School of Agricultural, Forest and Food Sciences HAFL > Agriculture > Plant Production and Biodiversity

Name:

Pellet, Didier;
Mercier, Edith;
Ballestra, Ursula and
Keiser, Andreas

Subjects:

S Agriculture > S Agriculture (General)
S Agriculture > SB Plant culture

Publisher:

Agroscope

Language:

French

Submitter:

Andreas Keiser

Date Deposited:

08 Feb 2021 14:32

Last Modified:

08 Feb 2021 14:32

Uncontrolled Keywords:

winter oilseed rape, sulphur deficiency, model, yield, S-fertilisation, oil content, glucosinolates, sulphur uptake

ARBOR DOI:

10.24451/arbor.14067

URI:

https://arbor.bfh.ch/id/eprint/14067

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