Abstract
In order to alleviate the shortage of water in Xinjiang cotton fields, to ensure the sustainable development of the cotton industry in southern Xinjiang, it is necessary to determine a suitable “dry sowing and wet emergence” water quantity plan for cotton fields in southern Xinjiang to change the current situation. In this study, to explore the irrigation regime of “dry sowing and wet emergence” for cotton in Korla, Xinjiang, by combining field experiments and modeling simulations, the effects of different irrigation amounts on the water–heat–salt and seedling emergence characteristics of “dry sowing and wet emergence” cotton fields were investigated; the soil, water, and salt transport under different irrigation regimes was simulated by using HYDRUS-2D, and the seedling emergence rate of the cotton under different irrigation regimes was obtained through the establishment of a regression model. The results indicated that, in the field experiment, the soil water content of the 0−40 cm soil layer showed an overall trend of first increasing and then decreasing with time, while the soil salt content showed an overall trend of first decreasing and then increasing over time. The soil water content at the drip heads and cotton rows position, as well as on the 15th day, increased by an average of 5.58 cm3·cm−3 compared to before irrigation, and the soil salt content decreased by an average of 2.74 g/kg compared to before irrigation. In the irrigation water range of 675−825 m3/hm2, reducing the irrigation water amount increased the cotton emergence rate by 3.86% and the cotton vigor index by 70.53%. After the model simulation, it is recommended to choose the cotton “dry sowing and wet emergence” irrigation regime with a low to medium water amount (300−450 m3/hm2) at 14-day intervals or a low to medium water amount (300−375 m3/hm2) at 7-day intervals, which can obtain a higher seedling emergence rate.
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The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 8
Claim · model-written summary
Soil water content first rose and then fell over time.
- Taxon
- cotton
Gossypium hirsutume1 - Outcome
- soil water contente0
- Direction
- first increasing and then decreasinge0
Not reportedOrgan / stage
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the soil water content of the 0−40 cm soil layer showed an overall trend of first increasing and then decreasing with time”
e1“Xinjiang cotton fields”
t0“cotton in Korla, Xinjiang”
Claim · model-written summary
Soil salt content first fell and then rose over time.
- Taxon
- cottonGossypium hirsutume1
- Outcome
- soil salt contente0
- Direction
- first decreasing and then increasinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the soil salt content showed an overall trend of first decreasing and then increasing over time”
e1“Xinjiang cotton fields”
Claim · model-written summary
Soil water content increased by 5.58 cm3·cm−3 after irrigation.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- irrigatione0
- Outcome
- soil water contente0
- Direction
- increasede0
- Value
- 5.58 cm3·cm−3e0
- Comparator
- before irrigatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The soil water content at the drip heads and cotton rows position, as well as on the 15th day, increased by an average of 5.58 cm3·cm−3 compared to before irrigation”
Claim · model-written summary
Soil salt content decreased by 2.74 g/kg after irrigation.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- irrigatione0
- Outcome
- soil salt contente0
- Direction
- decreasede0
- Value
- 2.74 g/kge0
- Comparator
- before irrigatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the soil salt content decreased by an average of 2.74 g/kg compared to before irrigation”
e1“Xinjiang cotton fields”
Claim · model-written summary
Reducing irrigation water increased cotton emergence by 3.86%.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- reducing the irrigation water amounte0
- Outcome
- cotton emergence ratee0
- Direction
- increasede0
- Value
- 3.86%e0
- Comparator
- 675−825 m3/hm2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the irrigation water range of 675−825 m3/hm2, reducing the irrigation water amount increased the cotton emergence rate by 3.86%”
Claim · model-written summary
Reducing irrigation water increased cotton vigor index by 70.53%.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- reducing the irrigation water amounte0
- Outcome
- cotton vigor indexe0
- Direction
- increasede0
- Value
- 70.53%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“reducing the irrigation water amount increased the cotton emergence rate by 3.86% and the cotton vigor index by 70.53%”
Claim · model-written summary
The model-supported recommendation is low to medium irrigation every 14 days for higher emergence.
- Taxon
- cottonGossypium hirsutume0
- Outcome
- a low to medium water amount (300−450 m3/hm2) at 14-day intervalse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it is recommended to choose the cotton “dry sowing and wet emergence” irrigation regime with a low to medium water amount (300−450 m3/hm2) at 14-day intervals or a low to medium water amount (300−375 m3/hm2) at 7-day intervals, which can obtain a higher seedling emergence rate”
Claim · model-written summary
The model-supported alternative is low to medium irrigation every seven days for higher emergence.
- Taxon
- cottonGossypium hirsutume1
- Outcome
- a low to medium water amount (300−375 m3/hm2) at 7-day intervalse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a low to medium water amount (300−375 m3/hm2) at 7-day intervals, which can obtain a higher seedling emergence rate”
e1“cotton “dry sowing and wet emergence” irrigation regime”
The same questions in other papers
irrigation · growth · Gossypium hirsutum (cotton)Positive and negative results
100 papers in the same direction as this paper · 40 in the opposite direction · 3 reporting no difference from an alternative
- positive
- negative
- negative
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See all 144 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.