Abstract
Abstract Yield formation in cereal‐rich crop rotations and monocultures in an extensive and intensive crop‐management system In a long duration trial, conducted from 1979/80 to 1992 at TU‐Munich's research station in Roggenstein, the performance of monocultures of winter wheat, winter barley and winter rye, as well as numerous cereal‐crop rotations were compared in an extensive and intensive crop‐management system. The results obtained can be summarized as follows. Over the course of 13 years, the influence of the immediately preceding crop on the yield of the main crops was of much greater significance than the rotation as a whole. With winter wheat, no yield differences could be observed between monoculture and cereal crop rotation (if the rotation did not include oats). Oats, rape, field bean, pea, potato and maize as preceding crops, however, in crop management systems, led to, on average, an increase in yield of 13 dt/ha from the following wheat. Winter barley yields were not significantly different in monoculture, cereal crop rotations and crop rotations containing 66% cereals. Furthermore, winter rye yields were the same in monocultures and cereal crop rotations. With all cereals, intensification of fertilizing and chemical plant protection led to a considerable increase in yield, but did not diminish the effects of the preceding crop. Hence, even with the use of modern agronomical techniques it is impossible to compensate for yield losses due to crop rotation.
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Claims 13
Claim · model-written summary
The preceding crop had a greater influence on main-crop yield than the entire rotation over 13 years.
- Taxon
- winter wheat
Triticum aestivumt0 - Treatment
- immediately preceding crope0
- Outcome
- yield of the main cropse0
- Direction
- much greater significancee0
- Comparator
- rotation as a wholee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Over the course of 13 years, the influence of the immediately preceding crop on the yield of the main crops was of much greater significance than the rotation as a whole”
t0“winter wheat, winter barley and winter rye”
Claim · model-written summary
Winter wheat yield did not differ between monoculture and cereal rotation without oats.
- Taxon
- winter wheatTriticum aestivume0
- Outcome
- yield differencese0
- Direction
- no yield differencese0
- Qualifier
- if the rotation did not include oatse0
- Comparator
- cereal crop rotatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With winter wheat, no yield differences could be observed between monoculture and cereal crop rotation (if the rotation did not include oats)”
Claim · model-written summary
Oats as a preceding crop raised following wheat yield by 13 dt/ha on average.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Oats, rape, field bean, pea, potato and maize as preceding crops, however, in crop management systems, led to, on average, an increase in yield of 13 dt/ha from the following wheat”
Claim · model-written summary
Rape as a preceding crop raised following wheat yield by 13 dt/ha on average.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Oats, rape, field bean, pea, potato and maize as preceding crops, however, in crop management systems, led to, on average, an increase in yield of 13 dt/ha from the following wheat”
Claim · model-written summary
Field bean as a preceding crop raised following wheat yield by 13 dt/ha on average.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Oats, rape, field bean, pea, potato and maize as preceding crops, however, in crop management systems, led to, on average, an increase in yield of 13 dt/ha from the following wheat”
Claim · model-written summary
Pea as a preceding crop raised following wheat yield by 13 dt/ha on average.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Oats, rape, field bean, pea, potato and maize as preceding crops, however, in crop management systems, led to, on average, an increase in yield of 13 dt/ha from the following wheat”
Claim · model-written summary
Potato as a preceding crop raised following wheat yield by 13 dt/ha on average.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Oats, rape, field bean, pea, potato and maize as preceding crops, however, in crop management systems, led to, on average, an increase in yield of 13 dt/ha from the following wheat”
Claim · model-written summary
Maize as a preceding crop raised following wheat yield by 13 dt/ha on average.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Oats, rape, field bean, pea, potato and maize as preceding crops, however, in crop management systems, led to, on average, an increase in yield of 13 dt/ha from the following wheat”
Claim · model-written summary
Winter barley yield did not significantly differ across monoculture, cereal rotation and rotation with 66% cereals.
- Taxon
- Winter barley
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Hordeum vulgaree0 - Outcome
- yieldse0
- Direction
- not significantly differente0
- Comparator
- cereal crop rotations and crop rotations containing 66% cerealse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Winter barley yields were not significantly different in monoculture, cereal crop rotations and crop rotations containing 66% cereals”
Claim · model-written summary
Winter rye yields were the same in monoculture and cereal rotations.
- Taxon
- winter rye
Secale cerealee0 - Outcome
- yieldse0
- Direction
- the samee0
- Comparator
- cereal crop rotationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“winter rye yields were the same in monocultures and cereal crop rotations”
Claim · model-written summary
Intensified fertilization and chemical protection considerably increased yield of all cereals.
- Taxon
- cerealse0
- Treatment
- intensification of fertilizing and chemical plant protectione0
- Outcome
- yielde0
- Direction
- increasee0
Not reportedComparator
Verbatim
e0“With all cereals, intensification of fertilizing and chemical plant protection led to a considerable increase in yield”
Claim · model-written summary
Intensification did not diminish preceding-crop effects.
Verbatim
e0“but did not diminish the effects of the preceding crop”
t0“With all cereals”
Claim · model-written summary
Authors conclude modern agronomic techniques cannot compensate for rotation-related yield losses.
Verbatim
e0“even with the use of modern agronomical techniques it is impossible to compensate for yield losses due to crop rotation”
t0“With all cereals”
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