The influence of mineral fertilisers, farmyard manure, liming and sowing rate on winter wheat grain yields

Mikuláš Madaras, Markéta Mayerová, Jitka Kumhálová and Jan Lipavský
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Mikuláš Madaras: Divisionof Crop Management Systems, Crop Research Institute, Prague, Czech Republic
Markéta Mayerová: Divisionof Crop Management Systems, Crop Research Institute, Prague, Czech Republic
Jitka Kumhálová: Department of Machinery Utilization, Faculty of Engineering, Czech University of Life Sciences Prague, Prague, Czech Republic
Jan Lipavský: Divisionof Crop Management Systems, Crop Research Institute, Prague, Czech Republic

Plant, Soil and Environment, 2018, vol. 64, issue 1, 38-46

Abstract: The influence of mineral fertilisers, liming, farmyard manure and sowing rate on the winter wheat grain yields was studied in a long-term field experiment at 4 sites under different soil and climatic conditions in the Czech Republic. A total of 135 partial fraction-factorial experiments were performed between 1980 and 2013 and evaluated using a statistical model with linear and quadratic terms for each factor. Yield trends demonstrated remarkable influence of fertilisation at two sites of lower starting productivity. Here, grain yields increased by 50% and 25% since the trial commencement, while the rate of yield increase was low at more productive sites. Yields were the most frequently influenced by nitrogen (N) fertilisation, uniformly at all sites. N response curves were strongly curvilinear, but these differed between sites and were affected by preceding crops. The relative frequency of statistically significant influences decreased in the following order: N (significant at α < 0.05 in 89% of all partial trials) > sowing rate (29%) > phosphorus (22%) > farmyard manure (15%) > potassium (12%) > liming (8%). This order and the frequencies of these influences are discussed with regard to relevant site and soil conditions.

Keywords: Triticum aestivum; long-term field trials; seeding density; soil productivity; nutrients (search for similar items in EconPapers)
Date: 2018
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlpse:v:64:y:2018:i:1:id:703-2017-pse

DOI: 10.17221/703/2017-PSE

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