Abstract
ABSTRACT Introduction of the fructan crops root chicory ( Cichorium intybus L.; RC) and Jerusalem artichoke ( Helianthus tuberosus L.; JA) into agricultural production systems is desirable to diversify crop rotation. Field experiments were conducted to compare the agronomic performance of RC and JA with sugar beet ( Beta vulgaris L.; SB). One set of cultivars during 1995, 1996, and 1997 and an additional set in 1997 were grown on a sandy loam soil (Haplic Luvisol) at Braunschweig, Germany. Crops were cultivated with and without supplemental irrigation, complete and no weed control (1995 and 1996), and N fertilization rates of 0, 60, and 120 kg ha −1 Severe water stress caused significant but similar storage organ yield losses in all crops, whereas mild water stress mainly affected JA yields. Averaged across years and N levels, storage organ yield losses through weed competition under irrigation amounted to 70, 47, and 8% in SB, RC, and JA, respectively. Averaged across years, in the absence of water and weed stress, SB, RC, and JA at their respective optimal N levels gave root and tuber dry matter yields of 14.8, 15.0, and 11.5 Mg ha −1 , and sugar yields of 11.5, 11.2, and 8.1 Mg ha −1 , respectively. Maximal SB and JA yields generally were achieved at the highest N rate, while RC peak yields were attained at 60 kg N ha −1 With the same amount of N taken up, RC in 1995 and SB in 1996 and 1997 produced the highest sugar yields.
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Claims 16
Claim · model-written summary
Severe water stress caused significant, similar storage-organ yield losses in all three crops.
- Taxon
- root chicoryt0
- Treatment
- Severe water stresse0
- Outcome
- storage organ yield lossese0
- Direction
- lossese0
Not reportedComparator
Verbatim
e0“Severe water stress caused significant but similar storage organ yield losses in all crops”
t0“Root Chicory, Jerusalem Artichoke”
Claim · model-written summary
Mild water stress mainly affected Jerusalem artichoke yield.
- Taxon
- Jerusalem Artichoke
.jpg?width=60)
Helianthus tuberosust0 - Treatment
- mild water stresse0
- Outcome
- JA yieldse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“mild water stress mainly affected JA yields”
t0“Jerusalem Artichoke”
Claim · model-written summary
Under irrigation, weed competition caused 70% storage-organ yield loss in sugar beet.
- Taxon
- Sugarbeet
Beta vulgaris subsp. vulgarist0 - Treatment
- weed competitione0
- Outcome
- storage organ yield lossese0
- Direction
- lossese0
- Value
- 70e0
- Qualifier
- under irrigatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“storage organ yield losses through weed competition under irrigation amounted to 70, 47, and 8% in SB, RC, and JA, respectively”
t0“Sugarbeet”
Claim · model-written summary
Under irrigation, weed competition caused 47% storage-organ yield loss in root chicory.
- Taxon
- Root Chicoryt0
- Treatment
- weed competitione0
- Outcome
- storage organ yield lossese0
- Direction
- lossese0
- Value
- 47e0
- Qualifier
- under irrigatione0
Not reportedComparator
Verbatim
e0“storage organ yield losses through weed competition under irrigation amounted to 70, 47, and 8% in SB, RC, and JA, respectively”
t0“Root Chicory”
Claim · model-written summary
Under irrigation, weed competition caused 8% storage-organ yield loss in Jerusalem artichoke.
- Taxon
- Jerusalem ArtichokeHelianthus tuberosust0
- Treatment
- weed competitione0
- Outcome
- storage organ yield lossese0
- Direction
- lossese0
- Value
- 8%e0
- Qualifier
- under irrigatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“storage organ yield losses through weed competition under irrigation amounted to 70, 47, and 8% in SB, RC, and JA, respectively”
t0“Jerusalem Artichoke”
Claim · model-written summary
Without water or weed stress, sugar beet produced 14.8 Mg ha−1 dry matter yield at its optimal nitrogen level.
- Taxon
- SugarbeetBeta vulgaris subsp. vulgarist0
- Outcome
- root and tuber dry matter yieldse0
- Value
- 14.8e0
- Qualifier
- respective optimal N levelse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SB, RC, and JA at their respective optimal N levels gave root and tuber dry matter yields of 14.8, 15.0, and 11.5 Mg ha −1”
t0“Sugarbeet”
Claim · model-written summary
Without water or weed stress, root chicory produced 15.0 Mg ha−1 dry matter yield at its optimal nitrogen level.
Verbatim
e0“SB, RC, and JA at their respective optimal N levels gave root and tuber dry matter yields of 14.8, 15.0, and 11.5 Mg ha −1”
t0“Root Chicory”
Claim · model-written summary
Without water or weed stress, Jerusalem artichoke produced 11.5 Mg ha−1 dry matter yield at its optimal nitrogen level.
- Taxon
- Jerusalem ArtichokeHelianthus tuberosust0
- Outcome
- root and tuber dry matter yieldse0
- Value
- 11.5 Mg ha −1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SB, RC, and JA at their respective optimal N levels gave root and tuber dry matter yields of 14.8, 15.0, and 11.5 Mg ha −1”
t0“Jerusalem Artichoke”
Claim · model-written summary
Sugar beet produced 11.5 Mg ha−1 sugar yield at its optimal nitrogen level.
- Taxon
- SugarbeetBeta vulgaris subsp. vulgarist0
- Outcome
- sugar yieldse0
- Value
- 11.5e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sugar yields of 11.5, 11.2, and 8.1 Mg ha −1 , respectively”
t0“Sugarbeet”
Claim · model-written summary
Root chicory produced 11.2 Mg ha−1 sugar yield at its optimal nitrogen level.
Verbatim
e0“sugar yields of 11.5, 11.2, and 8.1 Mg ha −1 , respectively”
t0“Root Chicory”
Claim · model-written summary
Jerusalem artichoke produced 8.1 Mg ha−1 sugar yield at its optimal nitrogen level.
- Taxon
- Jerusalem ArtichokeHelianthus tuberosust0
- Outcome
- sugar yieldse0
- Value
- 8.1 Mg ha −1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sugar yields of 11.5, 11.2, and 8.1 Mg ha −1 , respectively”
t0“Jerusalem Artichoke”
Claim · model-written summary
Sugar beet generally reached maximal yield at the highest nitrogen rate.
- Taxon
- SugarbeetBeta vulgaris subsp. vulgarist0
- Treatment
- highest N ratee0
- Outcome
- Maximal SB and JA yieldse0
- Direction
- Maximale0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maximal SB and JA yields generally were achieved at the highest N rate”
t0“Sugarbeet”
Claim · model-written summary
Jerusalem artichoke generally reached maximal yield at the highest nitrogen rate.
- Taxon
- Jerusalem ArtichokeHelianthus tuberosust0
- Treatment
- highest N ratee0
- Outcome
- Maximal SB and JA yieldse0
- Direction
- Maximale0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Maximal SB and JA yields generally were achieved at the highest N rate”
t0“Jerusalem Artichoke”
Claim · model-written summary
Root chicory reached peak yield at 60 kg N ha−1.
Verbatim
e0“RC peak yields were attained at 60 kg N ha −1”
t0“Root Chicory”
Claim · model-written summary
At equal nitrogen uptake, root chicory had the highest sugar yield in 1995.
Verbatim
e0“With the same amount of N taken up, RC in 1995 and SB in 1996 and 1997 produced the highest sugar yields”
t0“Root Chicory”
Claim · model-written summary
At equal nitrogen uptake, sugar beet had the highest sugar yield in 1996 and 1997.
- Taxon
- SugarbeetBeta vulgaris subsp. vulgarist0
- Outcome
- highest sugar yieldse0
- Direction
- higheste0
- Qualifier
- same amount of N taken upe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“With the same amount of N taken up, RC in 1995 and SB in 1996 and 1997 produced the highest sugar yields”
t0“Sugarbeet”
The same questions in other papers
drought · yield · Helianthus tuberosus (Jerusalem artichoke)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
- negative
drought · yield · Cichorium intybus (chicory)Positive and negative results
3 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- negative
2 papers more in this group
See all 6 papers →competition · yield · Beta vulgaris (beet)Positive and negative results
4 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
- negative
2 papers more in this group
See all 6 papers →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.