Abstract
Abstract Irrigated wheat ( Triticum aestivum L.) in Texas is grown in early‐planted production systems that are grazed by stocker cattle ( Bos spp.) and late‐planted nongrazed production systems. The objectives were to: (i) verify cultivar ✕ production system interactions for 11 cultivars in 1988 and (ii) better understand grain yield relationships using data from 1986 experiments involving two semidwarf cultivars, Q588 and Vona, and the taller Siouxland. Average grain yield loss in 1988 due to grazing (grazed vs. nongrazed system) was 0.52, 1.37, and 2.18 Mg ha −1 for tall, intermediate, and short cultivars, respectively. Responses within height classes were consistent for three tall cultivars and five short cultivars. In the nongrazed production system in 1986, Q588 and Vona were better adapted as shown by linear increases in seed number and grain yield at anthesis biomass levels up to 1600 g m −2 . In contrast, Siouxland a taller cultivar did not increase seed number or grain yield when biomass exceeded 1300 g m −2 . Severe or later grazing reduces height, leaf area, and biomass. Under these less productive conditions, Siouxland yielded as much as Q588 or Vona. The cultivar ✕ system interaction is caused by the greater response of semidwarf cultivars to productive nongrazed systems coupled with the size advantage of tall cultivars in grazed systems. As a result, the yield advantage of semidwarf cultivars over tall cultivars is much greater in nongrazed as compared to grazed system.
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Claims 10
Claim · model-written summary
Average grain yield loss due to grazing was 0.52 Mg/ha for tall wheat cultivars
- Taxon
- wheat
Triticum aestivume0 - Material
- talle1
- Treatment
- grazinge1
- Outcome
- grain yield losse1
- Direction
- decreaseinferrede1
- Value
- 0.52e1
- Comparator
- nongrazed systeme1
- Setting
- Texase0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Average grain yield loss in 1988 due to grazing (grazed vs. nongrazed system) was 0.52, 1.37, and 2.18 Mg ha −1 for tall, intermediate, and short cultivars”
e0“Irrigated wheat ( Triticum aestivum L.) in Texas”
Claim · model-written summary
Average grain yield loss due to grazing was 1.37 Mg/ha for intermediate wheat cultivars
- Taxon
- wheatTriticum aestivume0
- Material
- intermediatee1
- Treatment
- grazinge1
- Outcome
- grain yield losse1
- Direction
- decreaseinferrede1
- Value
- 1.37e1
- Comparator
- nongrazed systeme1
- Setting
- Texase0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Average grain yield loss in 1988 due to grazing (grazed vs. nongrazed system) was 0.52, 1.37, and 2.18 Mg ha −1 for tall, intermediate, and short cultivars”
e0“Irrigated wheat ( Triticum aestivum L.) in Texas”
Claim · model-written summary
Average grain yield loss due to grazing was 2.18 Mg/ha for short wheat cultivars
- Taxon
- wheatTriticum aestivume0
- Material
- shorte1
- Treatment
- grazinge1
- Outcome
- grain yield losse1
- Direction
- decreaseinferrede1
- Value
- 2.18 Mg ha −1e1
- Comparator
- nongrazed systeme1
- Setting
- Texase0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Average grain yield loss in 1988 due to grazing (grazed vs. nongrazed system) was 0.52, 1.37, and 2.18 Mg ha −1 for tall, intermediate, and short cultivars”
e0“Irrigated wheat ( Triticum aestivum L.) in Texas”
Claim · model-written summary
Responses within height classes were consistent for three tall and five short cultivars
- Taxon
- wheatTriticum aestivume0
- Outcome
- Responses within height classese4
- Qualifier
- consistent for three tall cultivars and five short cultivarse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“Responses within height classes were consistent for three tall cultivars and five short cultivars”
e0“Irrigated wheat ( Triticum aestivum L.) in Texas”
Claim · model-written summary
Q588 and Vona seed number and grain yield increased linearly with anthesis biomass up to 1600 g m −2 in the nongrazed system
- Taxon
- wheatTriticum aestivume0
- Material
- Q588 and Vonae5
- Treatment
- anthesis biomasse5
- Outcome
- seed number and grain yielde5
- Direction
- increasese5
- Value
- 1600 g m −2e5
- Setting
- nongrazed production systeme5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“In the nongrazed production system in 1986, Q588 and Vona were better adapted as shown by linear increases in seed number and grain yield at anthesis biomass levels up to 1600 g m −2”
e0“Irrigated wheat ( Triticum aestivum L.) in Texas”
Claim · model-written summary
Siouxland seed number and grain yield did not increase when biomass exceeded 1300 g m −2
- Taxon
- wheatTriticum aestivume0
- Material
- Siouxlande6
- Outcome
- seed number or grain yielde6
- Direction
- no_changeinferrede6
- Value
- 1300 g m −2e6
- Qualifier
- when biomass exceeded 1300 g m −2e6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“In contrast, Siouxland a taller cultivar did not increase seed number or grain yield when biomass exceeded 1300 g m −2”
e0“Irrigated wheat ( Triticum aestivum L.) in Texas”
Claim · model-written summary
Severe or late grazing reduced height, leaf area and biomass of wheat
- Taxon
- wheatTriticum aestivume0
- Treatment
- Severe or later grazinge7
- Outcome
- height, leaf area, and biomasse7
- Direction
- reducese7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“Severe or later grazing reduces height, leaf area, and biomass”
e0“Irrigated wheat ( Triticum aestivum L.) in Texas”
Claim · model-written summary
Under less productive grazed conditions Siouxland yielded as much as Q588 or Vona
- Taxon
- wheatTriticum aestivume0
- Material
- Siouxlande1
- Outcome
- yieldede1
- Direction
- as much ase1
- Qualifier
- under these less productive conditionse1
- Comparator
- Q588 or Vonae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Under these less productive conditions, Siouxland yielded as much as Q588 or Vona”
e0“Irrigated wheat ( Triticum aestivum L.) in Texas”
Claim · model-written summary
The yield advantage of semidwarf over tall wheat cultivars is much greater in nongrazed than in grazed systems
- Taxon
- wheatTriticum aestivume0
- Material
- semidwarf cultivarse1
- Outcome
- yield advantagee1
- Direction
- greatere1
- Comparator
- grazed systeme1
- Setting
- nongrazede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“the yield advantage of semidwarf cultivars over tall cultivars is much greater in nongrazed as compared to grazed system”
e0“Irrigated wheat ( Triticum aestivum L.) in Texas”
Claim · model-written summary
The cultivar by system interaction is caused by the greater response of semidwarf cultivars to nongrazed systems combined with the size advantage of tall cultivars under grazing
- Taxon
- wheatTriticum aestivume0
- Outcome
- system interactione1
- Qualifier
- the greater response of semidwarf cultivars to productive nongrazed systems coupled with the size advantage of tall cultivars in grazed systemse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The cultivar ✕ system interaction is caused by the greater response of semidwarf cultivars to productive nongrazed systems coupled with the size advantage of tall cultivars in grazed systems”
e0“Irrigated wheat ( Triticum aestivum L.) in Texas”
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grazing · yield · Triticum aestivum (wheat)Results differ
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