Abstract
Studied in the present paper were the long-term effects of the application of high Mo, Zn, Sr and Ba rates (0, 90, 270, and 810 kg ha-1 on rapeseed oil content and oil fatty acid composition. The trace elements were applied in the spring of 1991, while the rapeseed was sown on a calcareous ?hernozem soil in 2001. The trace elements differed significantly in their rates of accumulation in rapeseed plants. Relative to the control, the Mo content of the stem increased up to 1,000 times, that of the chaff over 100 times, and that of the seed around 60 times. The levels of the other trace elements increased considerably less relative to the control. The increases were typically twofold to threefold, depending on the plant part involved. The trace elements accumulated the most in the vegetative plant parts, except for Zn, a major quantity of which was found in the seed as well. The application of the high rates of Sr, Zn and, to an extent. Mo reduced the seed oil content of rapeseed. However, the differences were not statistically significant. The application of the trace elements had no significant effect on the fatty acid composition of the rapeseed oil, either. The increased levels of the trace elements found in the rapeseed plants indicate that 11 years after application significant amounts of the applied elements are still present in the soil in a form available to plants. However, the rates were not high enough to affect the synthesis of oil and its fatty acid composition.
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Claims 11
Claim · model-written summary
Trace elements differed significantly in their accumulation rates in rapeseed.
Verbatim
e0“The trace elements differed significantly in their rates of accumulation in rapeseed plants”
Claim · model-written summary
Mo content in stems increased up to 1,000 times relative to control.
Verbatim
e0“Relative to the control, the Mo content of the stem increased up to 1,000 times”
e1“accumulation in rapeseed plants”
e2“application of high Mo, Zn, Sr and Ba rates”
Claim · model-written summary
Mo content in chaff increased over 100 times relative to control.
Verbatim
e0“that of the chaff over 100 times”
e1“accumulation in rapeseed plants”
e2“application of high Mo, Zn, Sr and Ba rates”
e3“Relative to the control, the Mo content of the stem increased up to 1,000 times”
Claim · model-written summary
Mo content in seed increased around 60 times relative to control.
Verbatim
e0“that of the seed around 60 times”
e1“accumulation in rapeseed plants”
e2“application of high Mo, Zn, Sr and Ba rates”
e3“Relative to the control, the Mo content of the stem increased up to 1,000 times”
Claim · model-written summary
Other trace elements increased about twofold to threefold, depending on plant part.
Verbatim
e0“The levels of the other trace elements increased considerably less relative to the control. The increases were typically twofold to threefold, depending on the plant part involved”
e1“accumulation in rapeseed plants”
e2“application of high Mo, Zn, Sr and Ba rates”
Claim · model-written summary
Trace elements accumulated mostly in vegetative parts, except Zn, which also accumulated substantially in seed.
Verbatim
e0“The trace elements accumulated the most in the vegetative plant parts, except for Zn, a major quantity of which was found in the seed as well”
e1“accumulation in rapeseed plants”
Claim · model-written summary
High Sr application reduced rapeseed seed oil content without statistical significance.
Not reportedComparator
Verbatim
e0“The application of the high rates of Sr, Zn and, to an extent. Mo reduced the seed oil content of rapeseed. However, the differences were not statistically significant”
Claim · model-written summary
High Zn application reduced rapeseed seed oil content without statistical significance.
Not reportedComparator
Verbatim
e0“The application of the high rates of Sr, Zn and, to an extent. Mo reduced the seed oil content of rapeseed. However, the differences were not statistically significant”
Claim · model-written summary
High Mo application reduced rapeseed seed oil content to an extent without statistical significance.
Not reportedComparator
Verbatim
e0“The application of the high rates of Sr, Zn and, to an extent. Mo reduced the seed oil content of rapeseed. However, the differences were not statistically significant”
Claim · model-written summary
Trace-element application had no significant effect on rapeseed-oil fatty acid composition.
- Taxon
- rapeseede0
- Treatment
- trace elementse0
- Outcome
- fatty acid composition of the rapeseed oile0
- Direction
- no significant effecte0
Not reportedComparator
Verbatim
e0“The application of the trace elements had no significant effect on the fatty acid composition of the rapeseed oil, either”
Claim · model-written summary
Elevated rapeseed trace-element concentrations indicated applied elements remained plant-available in soil after 11 years.
Verbatim
e0“The increased levels of the trace elements found in the rapeseed plants indicate that 11 years after application significant amounts of the applied elements are still present in the soil in a form available to plants”
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