Abstract
Drought frequently limits cool‐season legume productivity during summer. Our objective was to determine the effect of drought (water deficits) on forage yield, forage quality, and stand persistence of Kura clover ( Trifolium ambiguum M.B.), compared to alfalfa ( Medicago sativa L.), red clover ( Trifolium pratense L.), birdsfoot trefoil ( Lotus corniculatus L.), and cicer milkvetch ( Astragalus cicer L.). Kura clover was consistently among the lowest yielding legumes whether grown with (control) or without supplemental water applied while alfalfa was consistently among the highest yielding. Over 4 years, yields of Kura clover, alfalfa, red clover, birdsfoot trefoil, and cicer milkvetch were 168, 76, 117, 98, and 80% greater for the control compared to the drought treatment. Populations of Kura clover increased from 10 to over 35 plants/ft² during the experiment and were similar for drought and control treatments. Final populations of the other legumes averaged < 3 plants/ft². For both water regimes, Kura clover was consistently among those legumes with the highest herbage crude protein (CP) concentration and lowest fiber content. Drought decreased legume herbage neutral detergent fiber (NDF) and acid detergent fiber (ADF) concentration and increased NDF digestibility compared to the irrigated control. Kura clover will persist under drought, but its forage yields will be reduced to a greater extent than for other legumes.
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Claims 15
Claim · model-written summary
Kura clover ranked among the lowest yielding legumes in both water regimes.
Verbatim
e0“Kura clover was consistently among the lowest yielding legumes whether grown with (control) or without supplemental water applied while alfalfa was consistently among the highest yielding”
Claim · model-written summary
Alfalfa ranked among the highest yielding legumes in both water regimes.
- Taxon
- alfalfa
Medicago sativae0 - Outcome
- highest yieldinge0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“alfalfa was consistently among the highest yielding”
Claim · model-written summary
Kura clover control yield exceeded drought yield by 168 percent.
Verbatim
e0“Over 4 years, yields of Kura clover, alfalfa, red clover, birdsfoot trefoil, and cicer milkvetch were 168, 76, 117, 98, and 80% greater for the control compared to the drought treatment”
Claim · model-written summary
alfalfa control yield exceeded drought yield by 76 percent.
- Taxon
- alfalfaMedicago sativae0
- Treatment
- drought treatmente0
- Outcome
- yieldse0
- Direction
- greatere0
- Value
- 76e0
- Qualifier
- Over 4 yearse0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Over 4 years, yields of Kura clover, alfalfa, red clover, birdsfoot trefoil, and cicer milkvetch were 168, 76, 117, 98, and 80% greater for the control compared to the drought treatment”
Claim · model-written summary
red clover control yield exceeded drought yield by 117 percent.
- Taxon
- red clover
Trifolium pratensee0 - Treatment
- drought treatmente0
- Outcome
- yieldse0
- Direction
- greatere0
- Value
- 117e0
- Qualifier
- Over 4 yearse0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Over 4 years, yields of Kura clover, alfalfa, red clover, birdsfoot trefoil, and cicer milkvetch were 168, 76, 117, 98, and 80% greater for the control compared to the drought treatment”
Claim · model-written summary
birdsfoot trefoil control yield exceeded drought yield by 98 percent.
Verbatim
e0“Over 4 years, yields of Kura clover, alfalfa, red clover, birdsfoot trefoil, and cicer milkvetch were 168, 76, 117, 98, and 80% greater for the control compared to the drought treatment”
Claim · model-written summary
cicer milkvetch control yield exceeded drought yield by 80% percent.
Verbatim
e0“Over 4 years, yields of Kura clover, alfalfa, red clover, birdsfoot trefoil, and cicer milkvetch were 168, 76, 117, 98, and 80% greater for the control compared to the drought treatment”
Claim · model-written summary
Kura clover population rose from 10 to over 35 plants per square foot.
Verbatim
e0“Populations of Kura clover increased from 10 to over 35 plants/ft² during the experiment”
Claim · model-written summary
Kura clover populations were similar in drought and control treatments.
Verbatim
e0“were similar for drought and control treatments”
t0“Kura Clover”
Claim · model-written summary
Final populations of other legumes averaged below three plants per square foot.
Verbatim
e0“Final populations of the other legumes averaged < 3 plants/ft²”
Claim · model-written summary
Kura clover was among the highest in herbage crude protein under both water regimes.
Verbatim
e0“For both water regimes, Kura clover was consistently among those legumes with the highest herbage crude protein (CP) concentration and lowest fiber content”
Claim · model-written summary
Kura clover had among the lowest fiber contents under both water regimes.
Verbatim
e0“For both water regimes, Kura clover was consistently among those legumes with the highest herbage crude protein (CP) concentration and lowest fiber content”
Claim · model-written summary
Drought reduced legume NDF and ADF concentrations.
Verbatim
e0“Drought decreased legume herbage neutral detergent fiber (NDF) and acid detergent fiber (ADF) concentration and increased NDF digestibility compared to the irrigated control”
Claim · model-written summary
Drought increased legume NDF digestibility.
Verbatim
e0“Drought decreased legume herbage neutral detergent fiber (NDF) and acid detergent fiber (ADF) concentration and increased NDF digestibility compared to the irrigated control”
Claim · model-written summary
Kura clover persists under drought, though its yield is reduced more than other legumes.
Verbatim
e0“Kura clover will persist under drought, but its forage yields will be reduced to a greater extent than for other legumes”
The same questions in other papers
drought · yield · Trifolium pratense (red clover)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- negative
drought · yield · Medicago sativa (alfalfa)Positive and negative results
19 papers in the same direction as this paper · 4 in the opposite direction
- negative
- positive
- positive
20 papers more in this group
See all 24 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.