Impact of winter oilseed rape nutritional status during vegetative growth on yield

Witold Grzebisz, Katarzyna Przygocka-Cyna, Witold Szczepaniak and Agnieszka Zawieja
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Witold Grzebisz: Department of Agricultural Chemistry and Environmental Biogeochemistry, University of Life Sciences, Poznan, Poland
Witold Szczepaniak: Department of Agricultural Chemistry and Environmental Biogeochemistry, University of Life Sciences, Poznan, Poland
Agnieszka Zawieja: Department of Agricultural Chemistry and Environmental Biogeochemistry, University of Life Sciences, Poznan, Poland

Plant, Soil and Environment, 2019, vol. 65, issue 10, 490-496

Abstract: The nutritional status of winter oilseed rape (WOSR) during its vegetative period is crucial for plant growth and can be used for the seed yield prediction. This hypothesis was verified based on the data from long-term field experiments. The experiment consisted of four potassium (K) treatments based on the progressive K supply potential to plants from soil and fertilizer and two magnesium treatments (-Mg, +Mg) conducted in 2013-2015. The content of nutrients (Ntot, P, K, Mg, Ca, Fe, Mn, Zn, Cu) was determined at the rosette stage (BBCH 30) for leaves and separately for leaves and stems in the late stage of inflorescence growth (BBCH 57-59). The low K content appeared as the key limiting nutrient in WOSR plants in the rosette stage due to the insufficient soil fertility level, depended even more on weather conditions. This negative K nutritional trait persisted through the whole vegetative WOSR growth. Its detection was possible, because stems were included in the diagnostic procedure. The most reliable prognosis of WOSR yield was conducted based on the nutritional status of stems in the late stage of the inflorescence development.

Keywords: Brassica napus L.; macronutrient; fertilization; drought; potassium deficiency (search for similar items in EconPapers)
Date: 2019
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlpse:v:65:y:2019:i:10:id:512-2019-pse

DOI: 10.17221/512/2019-PSE

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