Tag Archives: spring oilseed rape

67-72 J. Kuht , T. Tõrra, A. Makke, J. Kilgi and E. Nugis
Effect of site-based precision fertilisation on yield and oil content of spring oilseed rape seeds
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Effect of site-based precision fertilisation on yield and oil content of spring oilseed rape seeds

J. Kuht¹ *, T. Tõrra¹, A. Makke¹, J. Kilgi¹ and E. Nugis²

¹Institute of Agricultural and Environmental Sciences, Estonian University of
Life Sciences, Kreutzwaldi 5, EE51014 Tartu, Estonia;
*Correspondence: jaan.kuht@emu.ee
²Institute of Technology, Estonian University of Life Sciences, Kreutzwaldi 56,
EE51014 Tartu, Estonia

Abstract:

The experiments using two fertilisation methods on the spring oilseed rape in 2012 were carried out in two places – on the Eerika experimental field of the Estonian University of Life Sciences and on the Erumäe producing field of the Pilsu farm. The aim of this work was to investigate site-based precision fertilisation on the spring oilseed rape yield and oil content in oilseed rape seeds. The preceding crop was spring wheat in both fields. Five treatments were used: control treatment (without fertilisers, C), common fertilising system (CvS), fertilisation by site-specific information (SI), fertilisation by site-specific information additionally with mineral nitrogen fertiliser (SI+MF), and site-specific fertilisation additionally with foliar nitrogen fertiliser (SI+FF). The highest seed and oil yield was achieved in treatments fertilised by sitespecific information additionally with foliage nitrogen fertiliser. In the production field, the statistically significant seed and oil yield increase was achieved in treatment. Oil content of spring oilseed rape seeds was higher in treatments C and CvS. In both trials, additional fertilising with foliar nitrogen (including microelements, SI+FF) increased the oil content of oilseed rape seeds. There was a negative correlation between the oil content and seed yield of spring oilseed rape.

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307-310 L. Narits
Occurrence of pests and stem rot on various oil crops
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Occurrence of pests and stem rot on various oil crops

L. Narits

Jõgeva Plant Breeding Institute, Aamisepa 1, Jõgeva, 48309, Estonia;e-mail: Lea.Narits@jpbi.ee

Abstract:

The purpose of this study was to find an oil crop with no serious problems with pests and diseases, making it suitable for organic farms.The spring oilseed rape is the most important oil crop in Estonia. Winter turnip rape andwinter oilseed rape are alternatives to spring rape.In the present exploration the following were investigated: incidence of flea beetles,pollen beetles and cabbage seed weevils, and the number of blind stalks and infection of stem rot on spring oilseed rape, winter oilseed rape and winter turnip rape.In winter oilseed rape and winter turnip rape trials no pesticides and fungicides were usedduring the growing period, but there was a variant of seed treatment by ‘Rapcol’ (phurathiocarb + matalaxil + fludioxonil) in comparison with the non-treated variant. Spring oilseed rape trials were treated by ‘Rapcol’ before sowing and sprayed by ‘Fastac’ (alpha-cypermethrin) at the beginning of flowering (stage of development – 61).The following results were obtained: flea beetles appeared most on winter oilseed rape,least on winter turnip rape. Pollen beetles appeared most on spring oilseed rape, least on winter turnip rape. Most pods damaged by pollen beetles’ larvae were found on winter oilseed rape, least on winter turnip rape. Damage by cabbage seed weevil was minimal in all the oil crop trials. Stem rot infection was high on spring oilseed rape, least on winter turnip rape.By the results of exploration it can be concluded that winter turnip rape had the lowestinfection by pests and disease and therefore has good potential for sustainable agriculture.

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83–86 P. Lääniste, J. Jõudu and V. Eremeev
Oil content of spring oilseed rape seeds according to fertilisation
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Oil content of spring oilseed rape seeds according to fertilisation

P. Lääniste, J. Jõudu and V. Eremeev

Department of Field Crop Husbandry, Estonian Agricultural University, Kreutzwaldi 64, 51014 Tartu, Estonia; e-mail: lpeeter@eau.ee

Abstract:

Field trials, to investigate the effect of microfertilisers on the oil content of seeds of the oilseed rape cultivar ‘Mascot’, were carried out at the Department of Field Crop Husbandry in 2002-2003. We used in our trial 7 different microfertilisers. Prior to the sowing, the field was sprayed with herbicide EK Trifluralin and mineral fertiliser OptiCropNPK 21-08-12+S+Mg+B+Ca, calculating 120 kg N ha-1. Plants were treated with microfertilisers on 26 June. Analyses of test results revealed that different microelements influenced the oil content of rape seeds. The positive effect was noted in variants where rape plants were treated with micronutrients and micronutrients mixtures. The highest oil content, 43.4% of seeds dry matter, had Molybdenum-treated rape.

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