Abstract
Although drought stress has been shown to reduce sorghum yield, little information has been published regarding its effects on sorghum seed quality.To evaluate the effects of water limitation treatments (full irrigation (Control), irrigation until flowering stage and irrigation until eight-leaf stage) on grain yield, yield components, seed germination and vigor in grain sorghum (Sorghum bicolor L. CV. Kimia), field and lab experiments were conducted at research farm and laboratory of Agriculture College, University of Tehran, Karaj, Iran in 2005. The experiments were arranged with a Randomized Complete Block Design (RCBD) and split-plot experimental design (water limitation treatments as a main plots and seed harvest stages as a sub-plots) with four replications in farm and laboratory, respectively. The Results showed that water limitation had significant effect on grain yield and yield components (p< 0.01). Control plants had more grain yield and yield components than the other irrigation levels due to longer growth season and better use of environmental conditions. Withholding irrigation at eight-leaf stage decreased grain yield and its components. Nevertheless, qualitative attributes i.e. seed germination and vigor index were not significantly affected by irrigation levels. Thus, it doesn't seem that water limitation would have a direct effect on metabolic activity of seed and consequently seed quality.
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Claims 3
Claim · model-written summary
Full irrigation gave higher grain yield and yield components than the water-limited treatments in sorghum.
- Treatment
- water limitatione0
- Outcome
- grain yield and yield componentse1
- Direction
- moree1
- Comparator
- full irrigation (Control)e0
- Setting
- in the fieldt0
SorghumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“water limitation treatments (full irrigation (Control), irrigation until flowering stage and irrigation until eight-leaf stage)”
e1“Control plants had more grain yield and yield components than the other irrigation levels”
t0“The effect of water limitation in the field on sorghum seed germination and vigor”
Claim · model-written summary
Withholding irrigation at the eight-leaf stage decreased sorghum grain yield and its components.
- Treatment
- Withholding irrigation at eight-leaf stagee2
- Outcome
- grain yield and its componentse2
- Direction
- decreasede2
- Setting
- in the fieldt0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Withholding irrigation at eight-leaf stage decreased grain yield and its components”
t0“The effect of water limitation in the field on sorghum seed germination and vigor”
Claim · model-written summary
Irrigation levels did not significantly affect sorghum seed germination and vigor index.
- Treatment
- irrigation levelse3
- Outcome
- seed germination and vigor indexe3
- Direction
- no_changeinferrede3
- Setting
- in the fieldt0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Nevertheless, qualitative attributes i.e. seed germination and vigor index were not significantly affected by irrigation levels”
t0“The effect of water limitation in the field on sorghum seed germination and vigor”
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