Abstract
Saline groundwater irrigation is an important way to alleviate the shortage of fresh water resources. In order to find a reasonable saline irrigation method for farmland, an irrigation experiment was conducted with fresh water and saline water at the seedling, jointing, heading, and filling stages. The soil salinity, growth, chlorophyll fluorescence, and yield of summer maize were measured. The results showed that alternating fresh and saline water irrigation led to a smaller increase in soil salinity relative to that irrigation with saline water alone. In addition, different sequences of alternating irrigation also significantly affected the accumulation of soil salinity. The maximum quantum yield, effective quantum yield of photochemical energy conversion, photochemical quenching, and non-photochemical quenching varied greatly at the jointing stage and heading stage. Furthermore, the yield of maize that was irrigated with fresh water at the heading stage (8.53 t ha−1) was greater than that at the jointing (7.69 t ha−1) and filling stages (7.45 t ha−1). Therefore, these findings indicate that in areas where fresh water is scarce, priority should be given to the application of fresh water at the heading stages for summer maize irrigation.
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Claims 6
Claim · model-written summary
Alternating irrigation caused a smaller soil salinity increase than saline water alone.
- Treatment
- alternating fresh and saline water irrigatione0
- Outcome
- soil salinitye0
- Direction
- smaller increasee0
- Comparator
- irrigation with saline water alonee0
Zea maysOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“alternating fresh and saline water irrigation led to a smaller increase in soil salinity relative to that irrigation with saline water alone.”
t0“Summer Maize”
Claim · model-written summary
Alternating irrigation sequence significantly affected soil salinity accumulation.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“different sequences of alternating irrigation also significantly affected the accumulation of soil salinity.”
t0“Summer Maize”
Claim · model-written summary
Four chlorophyll fluorescence metrics varied greatly at jointing and heading.
- Organ / stage
- jointing stage and heading stagee0
- Outcome
- maximum quantum yield, effective quantum yield of photochemical energy conversion, photochemical quenching, and non-photochemical quenchinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The maximum quantum yield, effective quantum yield of photochemical energy conversion, photochemical quenching, and non-photochemical quenching varied greatly at the jointing stage and heading stage.”
t0“Summer Maize”
Claim · model-written summary
Fresh water at heading produced maize yield of 8.53 t ha−1, above jointing and filling timing.
- Treatment
- fresh water at the heading stagee0
- Outcome
- yield of maizee0
- Direction
- greater thane0
- Value
- 8.53 t ha−1e0
- Qualifier
- 7.69 t ha−1e0
- Comparator
- jointinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the yield of maize that was irrigated with fresh water at the heading stage (8.53 t ha−1) was greater than that at the jointing (7.69 t ha−1) and filling stages (7.45 t ha−1).”
Claim · model-written summary
Fresh water at filling produced 7.45 t ha−1, below heading timing.
- Treatment
- filling stagese0
- Outcome
- yield of maizee0
- Direction
- greater thane0
- Value
- 7.45 t ha−1e0
- Comparator
- heading stagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the yield of maize that was irrigated with fresh water at the heading stage (8.53 t ha−1) was greater than that at the jointing (7.69 t ha−1) and filling stages (7.45 t ha−1).”
Claim · model-written summary
In water-scarce areas, prioritize fresh water at heading for summer maize.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in areas where fresh water is scarce, priority should be given to the application of fresh water at the heading stages for summer maize irrigation.”
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See all 16 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.