Abstract
Abstract Salt tolerance of wheat ( Triticum aestivum L.) is known to change during different stages of growth. The effects of salinity on growth and yield components of wheat at different stages of growth were determined in a 2‐yr field plot study at Brawley, CA. Four salinity levels were imposed on a Holtville silty clay [clayey over loamy, montmorillonitic (calcareous), hyperthermic Typic Torrifluvent] by irrigating with waters salinized with NaCl and CaCl 2 (1:1 w/w). Electrical conductivities of the irrigation waters were 1.4, 10.0, 20.0, and 30.0 dS m −1 in 1989, and 1.4, 8.0, 16.0, and 24.0 dS m −1 in 1990. The three irrigation treatments were (i) salinity imposed throughout the growing season, (ii) saline irrigation initiated after terminal spikelet differentiation (TSD), and (iii) saline irrigation discontinued at TSD. Growth and yield components measured were straw yield, total above ground biomass, number of spikelets per spike, number of kernels per spike, individual kernel weight, number of tillers per plant, and number of tiller spikes. Continuous salinity throughout the growing season significantly reduced all growth and yield components. Salinity imposed prior to TSD reduced the number of spikelets per spike and the number of tillers per plant, whereas salinity imposed after TSD significantly reduced only kernel number and weight. In general, the effect of salinity appears to be most pronounced on the yield components that are growing or developing at the time the salt stress is imposed. Total grain yields were maintained when moderately saline irrigation waters were substituted for good quality water during part of the growing season.
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Claims 6
Claim · model-written summary
Continuous salinity significantly reduced wheat straw yield and aboveground biomass.
- Taxon
- wheat
Triticum aestivume1 - Treatment
- Continuous salinity throughout the growing seasone0
- Outcome
- straw yield, total above ground biomasse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Growth and yield components measured were straw yield, total above ground biomass, number of spikelets per spike, number of kernels per spike, individual kernel weight, number of tillers per plant, and number of tiller spikes. Continuous salinity throughout the growing season significantly reduced all growth and yield components”
e1“wheat ( Triticum aestivum L.)”
Claim · model-written summary
Continuous salinity significantly reduced wheat spikelet, kernel and tiller counts.
- Taxon
- wheatTriticum aestivume1
- Treatment
- Continuous salinity throughout the growing seasone0
- Outcome
- number of spikelets per spike, number of kernels per spikee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Growth and yield components measured were straw yield, total above ground biomass, number of spikelets per spike, number of kernels per spike, individual kernel weight, number of tillers per plant, and number of tiller spikes. Continuous salinity throughout the growing season significantly reduced all growth and yield components”
e1“wheat ( Triticum aestivum L.)”
Claim · model-written summary
Continuous salinity significantly reduced individual wheat kernel weight and tiller spikes.
- Taxon
- wheatTriticum aestivume1
- Treatment
- Continuous salinity throughout the growing seasone0
- Outcome
- individual kernel weighte0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Growth and yield components measured were straw yield, total above ground biomass, number of spikelets per spike, number of kernels per spike, individual kernel weight, number of tillers per plant, and number of tiller spikes. Continuous salinity throughout the growing season significantly reduced all growth and yield components”
e1“wheat ( Triticum aestivum L.)”
Claim · model-written summary
Salinity before terminal spikelet differentiation reduced wheat spikelets per spike and tillers per plant.
- Taxon
- wheatTriticum aestivume1
- Treatment
- Salinity imposed prior to TSDe0
- Outcome
- number of spikelets per spike and the number of tillers per plante0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salinity imposed prior to TSD reduced the number of spikelets per spike and the number of tillers per plant”
e1“wheat ( Triticum aestivum L.)”
Claim · model-written summary
Salinity after terminal spikelet differentiation significantly reduced wheat kernel number and weight.
- Taxon
- wheatTriticum aestivume1
- Treatment
- salinity imposed after TSDe0
- Outcome
- kernel number and weighte0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“salinity imposed after TSD significantly reduced only kernel number and weight”
e1“wheat ( Triticum aestivum L.)”
Claim · model-written summary
Moderately saline water substituted for good quality water during part of the season maintained total wheat grain yield.
- Taxon
- wheatTriticum aestivume1
- Treatment
- moderately saline irrigation waterse0
- Outcome
- Total grain yieldse0
- Direction
- maintainede0
- Qualifier
- during part of the growing seasone0
- Comparator
- good quality watere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total grain yields were maintained when moderately saline irrigation waters were substituted for good quality water during part of the growing season”
e1“wheat ( Triticum aestivum L.)”
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