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Effects of nitrogen fertilization on the cadmium concentration in winter wheat grain

field studies on cadmium and nitrogen uptake and distribution in shoots as related to stage of development

Wångstrand, Håkan (2005). Effects of nitrogen fertilization on the cadmium concentration in winter wheat grain. Uppsala : Sveriges lantbruksuniv. , Reports from the Department of Soil Sciences, 1652-4748 ; 35
ISBN 91-576-6815-9
[Licentiate thesis]

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Abstract

The thesis summarizes and discusses results from field studies on the effects of nitrogen (N) fertilization on cadmium (Cd) concentration in winter wheat (Triticum aestivum L.). It also deals with Cd and N uptake and distribution in shoots as related to stage of development. Furthermore, the possibility to predict the grain Cd concentration at harvest from the Cd concentration in the shoot at earlier stages of development was investigated. The studies were conducted in the major wheat-growing districts in southern and central Sweden. It was shown that N fertilization caused an increase in Cd concentration in winter wheat grain, independent of site and cultivar. For an N application rate of 145 kg N ha-1 (Swedish norm) an increase of 30 kg (to increase grain protein content) would increase the grain Cd concentration by 6-14%. There were no significant effects of N application strategies such as earlier application and split rates on grain Cd concentration. The amounts of Cd and N in wheat shoots increased with time during the entire study period, from stem elongation to maturity. Nitrogen appeared to be redistributed to the ear/grain as soon as the ear emerged, whereas for Cd such redistribution only occurred close to maturity. There was a general correlation between Cd concentration in shoots and Cd concentration in mature grain. The correlation was strongest at ear formation, about two months before harvest. However, some deviations from the general pattern related to specific sites and cultivars make further inves-tigations necessary before prediction of the Cd concentration in harvested grain becomes practicable.

Authors/Creators:Wångstrand, Håkan
Title:Effects of nitrogen fertilization on the cadmium concentration in winter wheat grain
Subtitle:field studies on cadmium and nitrogen uptake and distribution in shoots as related to stage of development
Year of publishing :2005
Volume:35
Number of Pages:31
Papers/manuscripts:
NumberReferences
ALLI. Wångstrand, H., Eriksson, J. & Öborn, I. 2005. Effect of nitrogen fertilizer application on cadmium concentration in grain of winter wheat. (Submitted to European Journal of Agronomy) II. Eriksson, J., Wångstrand, H. & Öborn, I. 2005. Accumulation and distribution of Cd and N in winter wheat shoots during the growing season. Early prediction of Cd concentration in harvested grain. (Manuscript)
Place of Publication:Uppsala
ISBN for printed version:91-576-6815-9
ISSN:1652-4748
Language:English
Publication Type:Licentiate thesis
Full Text Status:Public
Agris subject categories.:F Plant production > F61 Plant physiology - Nutrition
Subjects:Not in use, please see Agris categories
Agrovoc terms:cadmium, fertilization, grain, nitrogen, nutrient uptake, shoots, triticum aestivum
Keywords:cadmium, fertilization, grain, nitrogen, plant uptake, cadmium prediction, Triticum aestivum
URN:NBN:urn:nbn:se:slu:epsilon-743
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-743
ID Code:937
Department:(NL, NJ) > Dept. of Soil Sciences
Deposited By: Håkan Wångstrand
Deposited On:20 Sep 2005 00:00
Metadata Last Modified:02 Dec 2014 10:08

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