Abstract
Manganese (Mn) is a micronutrient where a great range and low concentrations have been recorded in winter wheat seeds in a Swedish survey called the Swedish environmental monitoring program on arable soils. A deficiency of Mn is common in cereals and may occur early in the season if the plant availability of Mn is low in the soil. Deficiency of Mn can lead to a reduced growth and several studies have shown that a low content of Mn in the seed can lead to early deficiency of the growing seedling. Seed coating products with Mn is marketed in Sweden and is recommended to use if cereals are sown on soils low in available Mn. The aim of this thesis was to examine if Mn seed coating has an effect on germi-nation and seedling establishment in Swedish winter wheat and if the effect is influenced by the seed Mn content. Winter wheat seeds of the cultivar Julius were selected depending on the content of Mn in the seed and were divided into three levels, representing low (0.42-0.70 μg Mn/seed), medium (1.04-1.08 μg Mn/seed) and high (1.22-1.83 μg Mn/seed) content of Mn. The seeds were coated with the product Norotec Mn (MnSO4) or with deionised water as control and were used in two experiments. The seeds were sown on wet filter paper and in a soil where all essential mineral nutrients except for Mn had been applied. The experiments lasted for 10 days and four weeks respectively. The development of the seedlings was determined each day and at the end of the experiments, the seedlings were dried and weighed. The results showed no differences in plant development or seedling dry weight between coated and uncoated. Nor could any difference be detected in development or seedling dry weight depending on the level of seed Mn content. Because of a lack of positive effect on seedling growth by Mn seed coating in the experiments using this method, to supply Mn, is not an obvious choice to avoid deficiency and a reduced growth. The low level of seed Mn content used in the experiments were not low enough to limit early seedling growth.
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Claims 4
Claim · model-written summary
Manganese seed coating had no effect on plant development or seedling dry weight of winter wheat compared with uncoated seeds.
- Taxon
- Winter wheat
Triticum aestivume2 - Material
- Juliuse2
- Treatment
- coated with the product Norotec Mn (MnSO4)e3
- Outcome
- plant development or seedling dry weighte1
- Direction
- no differencese1
- Comparator
- uncoatede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The results showed no differences in plant development or seedling dry weight between coated and uncoated”
e2“Winter wheat seeds of the cultivar Julius”
e3“coated with the product Norotec Mn (MnSO4)”
Claim · model-written summary
Seed Mn content level had no detectable effect on development or seedling dry weight of winter wheat.
- Taxon
- Winter wheatTriticum aestivume2
- Treatment
- level of seed Mn contente4
- Outcome
- development or seedling dry weighte4
- Direction
- no_changeinferrede4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Nor could any difference be detected in development or seedling dry weight depending on the level of seed Mn content”
e2“Winter wheat seeds of the cultivar Julius”
Claim · model-written summary
Mn seed coating is not an obvious choice to avoid Mn deficiency and reduced growth in winter wheat.
- Taxon
- Winter wheatTriticum aestivume2
- Treatment
- Mn seed coatinge5
- Outcome
- avoid deficiency and a reduced growthe5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“by Mn seed coating in the experiments using this method, to supply Mn, is not an obvious choice to avoid deficiency and a reduced growth”
e2“Winter wheat seeds of the cultivar Julius”
Claim · model-written summary
The seed Mn levels used were not low enough to limit early seedling growth of winter wheat.
- Taxon
- Winter wheatTriticum aestivume2
- Outcome
- early seedling growthe6
- Qualifier
- not low enough to limite6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“The low level of seed Mn content used in the experiments were not low enough to limit early seedling growth”
e2“Winter wheat seeds of the cultivar Julius”
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Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.