Abstract
ABSTRACT Water scarcity has led to the adoption of water-saving irrigation technology around the world. Drip-irrigation has been used for rice (Oryza sativa L.) cultivation in Xinjiang, China. Researchers reported 12.0 t/ha yield; however, drip-irrigated rice produces around 6-8 t/ha in practice, and it is clear that water deficiency explains this gap. Therefore, the objective of this experiment was to compare the growth, photosynthetic characteristics, and antioxidant activity of rice grown in nutrient solutions with water potentials of 0.00, -0.02, -0.05, and -0.09 MPa [0, 2.5, 5.0, and 7.5% polyethylene glycol (PEG), respectively], to determine the optimal water conditions for drip-irrigated rice. There was no significant difference between the 0, 2.5, and 5.0% PEG treatments for relative growth rate and relative water content after 10 and 20 days. However, 2.5 and 5.0% PEG treatments substantially affected the photosynthetic capacity and antioxidant enzyme activity after 10 and 20 days. Treatment with 7.5% PEG inhibited shoot growth. There was a significant reduction in antioxidant enzyme activity. Water-saving rice cultivation, such as drip-irrigated rice, suffered mild drought stress at -0.02 to -0.05 Mpa, but this did not inhibit growth. The amount of irrigation should be increased to obtain higher rice yields under drip-irrigation conditions.
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Claims 7
Claim · model-written summary
Relative growth rate did not differ significantly among 0, 2.5 and 5.0% PEG after 10 and 20 days.
- Taxon
- rice
Oryza sativat0 - Treatment
- 2.5, and 5.0% PEG treatmentse0
- Outcome
- relative growth ratee0
- Direction
- no significant differencee0
- Qualifier
- after 10 and 20 dayse0
- Comparator
- 0e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was no significant difference between the 0, 2.5, and 5.0% PEG treatments for relative growth rate and relative water content after 10 and 20 days.”
t0“RICE”
Claim · model-written summary
Relative water content did not differ significantly among 0, 2.5 and 5.0% PEG after 10 and 20 days.
- Taxon
- riceOryza sativat0
- Treatment
- 2.5, and 5.0% PEG treatmentse0
- Outcome
- relative water contente0
- Direction
- no significant differencee0
- Qualifier
- after 10 and 20 dayse0
- Comparator
- 0e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was no significant difference between the 0, 2.5, and 5.0% PEG treatments for relative growth rate and relative water content after 10 and 20 days.”
t0“RICE”
Claim · model-written summary
2.5% PEG substantially affected photosynthetic capacity and antioxidant enzyme activity.
- Taxon
- riceOryza sativat0
- Treatment
- 2.5e0
- Outcome
- photosynthetic capacity and antioxidant enzyme activitye0
- Qualifier
- after 10 and 20 dayse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“However, 2.5 and 5.0% PEG treatments substantially affected the photosynthetic capacity and antioxidant enzyme activity after 10 and 20 days.”
t0“RICE”
Claim · model-written summary
5.0% PEG substantially affected photosynthetic capacity and antioxidant enzyme activity.
- Taxon
- riceOryza sativat0
- Treatment
- 5.0% PEG treatmentse0
- Outcome
- photosynthetic capacity and antioxidant enzyme activitye0
- Qualifier
- after 10 and 20 dayse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“However, 2.5 and 5.0% PEG treatments substantially affected the photosynthetic capacity and antioxidant enzyme activity after 10 and 20 days.”
t0“RICE”
Claim · model-written summary
7.5% PEG inhibited shoot growth.
- Taxon
- riceOryza sativat0
- Treatment
- 7.5% PEGe0
- Outcome
- shoot growthe0
- Direction
- inhibitede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatment with 7.5% PEG inhibited shoot growth.”
t0“RICE”
Claim · model-written summary
Antioxidant enzyme activity was significantly reduced.
- Taxon
- riceOryza sativat0
- Outcome
- antioxidant enzyme activitye0
- Direction
- reductione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was a significant reduction in antioxidant enzyme activity.”
t0“RICE”
Claim · model-written summary
The authors recommend increasing irrigation to obtain higher rice yields under drip irrigation.
- Taxon
- riceOryza sativae0
- Outcome
- amount of irrigation should be increasede0
- Qualifier
- higher rice yields under drip-irrigation conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The amount of irrigation should be increased to obtain higher rice yields under drip-irrigation conditions.”
The same questions in other papers
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See all 29 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.