Abstract
ABSTRACT Using brackish and saline water is one of the most effective ways to solve the problem of water resource shortage. To rationally exploit and make use of brackish and saline water resources, the effects of drip irrigation underneath a plastic film with different salinities of irrigation water on soil salt content and cotton growth were studied at the Aksu National Field Research Station of Agro‐ecosystem in Xinjiang from 2008 to 2009. The results showed that the soil salt increases before the first irrigation of the growing period, then generally decreases during the irrigation period, and increases after the final irrigation of the growing period and before winter irrigation. In extremely arid areas, the leaching effect of rainfall is weakened. When cotton is irrigated with saline water of salinity greater than 2·24 g l −1 , the salt is accumulated at the main cotton root zone. The effect of salinity of irrigation water on cotton growth is a gradual process and is highlighted during the boll‐opening period. Leaf area index, root area index, root length density, and root weight density all decrease with an increase of salinity of irrigation water and soil salt content in the root zone. The root weight density and root length density of treatments with brackish or saline water are far less than those of treatment with fresh water. After sowing, with the increase of time, the leaf area index changes from small to large, reaches its peak at the flowering‐bolling stage, and then reverts from large to small; however, root area index, average cotton root length density, and root weight density of the 0‐ to 50‐cm soil layer continuously increase throughout the entire process. During the boll‐opening period, the vitality of the cotton root remains strong. Copyright © 2012 John Wiley & Sons, Ltd.
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Claims 12
Claim · model-written summary
Soil salt increases before the first irrigation of the growing period in cotton fields under drip irrigation with saline water.
- Taxon
- cotton
Gossypium hirsutume0 - Outcome
- soil salte1
- Direction
- increasese1
- Qualifier
- before the first irrigation of the growing periode1
- Setting
- Aksu National Field Research Statione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effects of drip irrigation underneath a plastic film with different salinities of irrigation water on soil salt content and cotton growth were studied at the Aksu National Field Research Station”
e1“The results showed that the soil salt increases before the first irrigation of the growing period, then generally decreases during the irrigation period, and increases after the final irrigation of the growing period and before winter irrigation”
Claim · model-written summary
Soil salt generally decreases during the irrigation period in cotton fields under drip irrigation with saline water.
- Taxon
- cottonGossypium hirsutume0
- Outcome
- soil salte1
- Direction
- decreasese1
- Qualifier
- during the irrigation periode1
- Setting
- Aksu National Field Research Statione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effects of drip irrigation underneath a plastic film with different salinities of irrigation water on soil salt content and cotton growth were studied at the Aksu National Field Research Station”
e1“The results showed that the soil salt increases before the first irrigation of the growing period, then generally decreases during the irrigation period, and increases after the final irrigation of the growing period and before winter irrigation”
Claim · model-written summary
Soil salt increases after the final irrigation of the growing period and before winter irrigation in cotton fields.
- Taxon
- cottonGossypium hirsutume0
- Outcome
- soil salte1
- Direction
- increasese1
- Qualifier
- after the final irrigation of the growing period and before winter irrigatione1
- Setting
- Aksu National Field Research Statione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effects of drip irrigation underneath a plastic film with different salinities of irrigation water on soil salt content and cotton growth were studied at the Aksu National Field Research Station”
e1“The results showed that the soil salt increases before the first irrigation of the growing period, then generally decreases during the irrigation period, and increases after the final irrigation of the growing period and before winter irrigation”
Claim · model-written summary
In extremely arid areas the leaching effect of rainfall is weakened, according to the authors.
- Taxon
- cottonGossypium hirsutume0
- Outcome
- leaching effect of rainfalle2
- Direction
- weakenede2
- Setting
- extremely arid arease2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effects of drip irrigation underneath a plastic film with different salinities of irrigation water on soil salt content and cotton growth were studied at the Aksu National Field Research Station”
e2“In extremely arid areas, the leaching effect of rainfall is weakened”
Claim · model-written summary
When cotton is irrigated with saline water of salinity above 2·24 g l −1, salt accumulates at the main cotton root zone.
- Taxon
- cottonGossypium hirsutume3
- Organ / stage
- main cotton root zonee4
- Treatment
- saline watere3
- Outcome
- salte4
- Direction
- accumulatede4
- Qualifier
- salinity greater than 2·24 g l −1e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“When cotton is irrigated with saline water of salinity greater than 2·24 g l −1”
e4“the salt is accumulated at the main cotton root zone”
Claim · model-written summary
Leaf area index and root area index decrease as salinity of irrigation water and soil salt content in the root zone increase.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- an increase of salinity of irrigation watere5
- Outcome
- Leaf area index, root area indexe5
- Direction
- decreasee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effects of drip irrigation underneath a plastic film with different salinities of irrigation water on soil salt content and cotton growth were studied at the Aksu National Field Research Station”
e5“Leaf area index, root area index, root length density, and root weight density all decrease with an increase of salinity of irrigation water and soil salt content in the root zone”
Claim · model-written summary
Root length density and root weight density decrease as salinity of irrigation water and soil salt content in the root zone increase.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- an increase of salinity of irrigation watere5
- Outcome
- root length density, and root weight densitye5
- Direction
- decreasee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effects of drip irrigation underneath a plastic film with different salinities of irrigation water on soil salt content and cotton growth were studied at the Aksu National Field Research Station”
e5“Leaf area index, root area index, root length density, and root weight density all decrease with an increase of salinity of irrigation water and soil salt content in the root zone”
Claim · model-written summary
Root weight density and root length density of cotton treated with brackish or saline water are far less than with fresh water.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- brackish or saline watere6
- Outcome
- root weight density and root length densitye6
- Direction
- far lesse6
- Comparator
- fresh watere6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effects of drip irrigation underneath a plastic film with different salinities of irrigation water on soil salt content and cotton growth were studied at the Aksu National Field Research Station”
e6“The root weight density and root length density of treatments with brackish or saline water are far less than those of treatment with fresh water”
Claim · model-written summary
The effect of salinity of irrigation water on cotton growth is a gradual process.
- Taxon
- cottonGossypium hirsutume7
- Treatment
- salinity of irrigation watere7
- Outcome
- cotton growthe7
- Qualifier
- highlighted during the boll‐opening periode7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“The effect of salinity of irrigation water on cotton growth is a gradual process and is highlighted during the boll‐opening period”
Claim · model-written summary
Leaf area index in cotton rises after sowing, peaks at the flowering-bolling stage and then declines.
- Taxon
- cottonGossypium hirsutume0
- Organ / stage
- flowering‐bolling stagee1
- Outcome
- leaf area indexe1
- Qualifier
- reaches its peake1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effects of drip irrigation underneath a plastic film with different salinities of irrigation water on soil salt content and cotton growth were studied at the Aksu National Field Research Station”
e1“After sowing, with the increase of time, the leaf area index changes from small to large, reaches its peak at the flowering‐bolling stage, and then reverts from large to small”
Claim · model-written summary
Root area index, average root length density and root weight density of cotton in the 0-50 cm soil layer increase continuously throughout the season.
- Taxon
- cottonGossypium hirsutume0
- Organ / stage
- the 0‐ to 50‐cm soil layere1
- Outcome
- root area index, average cotton root length density, and root weight densitye1
- Direction
- continuously increasee1
- Qualifier
- throughout the entire processe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effects of drip irrigation underneath a plastic film with different salinities of irrigation water on soil salt content and cotton growth were studied at the Aksu National Field Research Station”
e1“root area index, average cotton root length density, and root weight density of the 0‐ to 50‐cm soil layer continuously increase throughout the entire process”
Claim · model-written summary
During the boll-opening period, the vitality of cotton roots remains strong.
- Taxon
- cottonGossypium hirsutume1
- Outcome
- vitality of the cotton roote1
- Qualifier
- During the boll‐opening periode1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“During the boll‐opening period, the vitality of the cotton root remains strong”
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salinity · growth · Gossypium hirsutum (cotton)Positive and negative results
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