Abstract
Two field experiments were carried out at Rice Research and Training Center, Sakha, Kafr El-Sheikh, Egypt during 2018 and 2019 cropping seasons. Experiments aimed to determine the impacts of different deficit irrigation treatments on the available soil nutrients, N, P, K and Zn uptakes, rice yield and water use efficiency. The field experiments were laid out in a strip-plot design with four replications. The horizontal plots were devoted to the four irrigation treatments: continuous submergence (W1), intermittent irrigation at 6-day intervals (W2), intermittent irrigation at 9-day intervals (W3) and intermittent irrigation at 12-day intervals (W4), while vertical plots were occupied by the three rice genotypes, namely Giza 177, Giza 179 and GZ10154. Intermittent irrigation at 6-days intervals (W2) treatment, recorded the highest available NH4+-N, NO3--N and K concentrations in the soil. The highest values of available-N and available-P concentrations in the soil were obtained with (W1) while (W4) recorded the lowest values. The N, P, K and Zn uptakes were significantly affected by the prolonged irrigation intervals. Rice yield and its attributes decreased significantly as irrigation intervals increased up to 12-day (W4) in both seasons. The highest values of plant height, number of panicles m-2, panicle weight (g), 1000-grain weight (g), number of filled grains panicle-1, grain and straw yields were obtained with (W1) followed by (W2) treatment, except panicle length and number of unfilled grains panicle-1 in both seasons. Water saved (%) ranged from 8.90% to 26.46% and from 17.47% to 27.25% in 2018 and 2019 seasons, respectively.
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Claims 9
Claim · model-written summary
W2 gave the highest available soil ammonium, nitrate and potassium concentrations.
- Taxon
- Rice
Oryza sativat0 - Treatment
- Intermittent irrigation at 6-days intervals (W2)e0
- Outcome
- available NH4+-N, NO3--N and K concentrations in the soile0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Intermittent irrigation at 6-days intervals (W2) treatment, recorded the highest available NH4+-N, NO3--N and K concentrations in the soil.”
t0“Rice”
Claim · model-written summary
W1 gave the highest available soil N and P.
- Taxon
- RiceOryza sativat0
- Treatment
- W1e0
- Outcome
- available-N and available-P concentrations in the soile0
- Direction
- higheste0
- Comparator
- W4e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest values of available-N and available-P concentrations in the soil were obtained with (W1) while (W4) recorded the lowest values.”
t0“Rice”
Claim · model-written summary
W4 gave the lowest available soil N and P.
- Taxon
- RiceOryza sativat0
- Treatment
- W4e0
- Outcome
- available-N and available-P concentrations in the soile0
- Direction
- loweste0
- Comparator
- W1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest values of available-N and available-P concentrations in the soil were obtained with (W1) while (W4) recorded the lowest values.”
t0“Rice”
Claim · model-written summary
Longer irrigation intervals significantly affected rice N, P, K and Zn uptake, without a stated direction.
- Taxon
- RiceOryza sativat0
- Treatment
- prolonged irrigation intervalse0
- Outcome
- N, P, K and Zn uptakese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The N, P, K and Zn uptakes were significantly affected by the prolonged irrigation intervals.”
t0“Rice”
Claim · model-written summary
Rice yield and yield attributes declined significantly as intervals lengthened to 12 days.
- Taxon
- RiceOryza sativat0
- Treatment
- irrigation intervals increased up to 12-day (W4)e0
- Outcome
- Rice yield and its attributese0
- Direction
- decreasede0
- Qualifier
- both seasonse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Rice yield and its attributes decreased significantly as irrigation intervals increased up to 12-day (W4) in both seasons.”
t0“Rice”
Claim · model-written summary
W1 had the highest plant height and panicle traits, followed by W2, with stated exceptions.
- Taxon
- RiceOryza sativat0
- Treatment
- W1e0
- Outcome
- plant height, number of panicles m-2, panicle weighte0
- Direction
- higheste0
- Qualifier
- except panicle length and number of unfilled grains panicle-1 in both seasonse0
- Comparator
- W2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest values of plant height, number of panicles m-2, panicle weight (g), 1000-grain weight (g), number of filled grains panicle-1, grain and straw yields were obtained with (W1) followed by (W2) treatment, except panicle length and number of unfilled grains panicle-1 in both seasons.”
t0“Rice”
Claim · model-written summary
W1 had the highest grain weight, filled grain number, and grain and straw yields, followed by W2.
- Taxon
- RiceOryza sativat0
- Treatment
- W1e0
- Outcome
- 1000-grain weight (g), number of filled grains panicle-1, grain and straw yieldse0
- Direction
- higheste0
- Comparator
- W2e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest values of plant height, number of panicles m-2, panicle weight (g), 1000-grain weight (g), number of filled grains panicle-1, grain and straw yields were obtained with (W1) followed by (W2) treatment, except panicle length and number of unfilled grains panicle-1 in both seasons.”
t0“Rice”
Claim · model-written summary
Water saving ranged from 8.90% to 26.46% in 2018.
- Taxon
- RiceOryza sativat0
- Outcome
- Water savede0
- Value
- 8.90% to 26.46%e0
- Qualifier
- 2018e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water saved (%) ranged from 8.90% to 26.46% and from 17.47% to 27.25% in 2018 and 2019 seasons, respectively.”
t0“Rice”
Claim · model-written summary
Water saving ranged from 17.47% to 27.25% in 2019.
- Taxon
- RiceOryza sativat0
- Outcome
- Water savede0
- Value
- 17.47% to 27.25%e0
- Qualifier
- 2019e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water saved (%) ranged from 8.90% to 26.46% and from 17.47% to 27.25% in 2018 and 2019 seasons, respectively.”
t0“Rice”
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