Abstract
The study was carried out in of 2015 and 2016 seasons at the Experimental Farm of El-Sirw Agriculture Research Station, Damietta Governorate, and Egypt. The main objective of an attempt was to determine the effect of short, medium and prolong irrigation intervals (irrigation every three, six and nine days) and gypsum rates (0, 0.5,1.0 and 1.5 t ha-1 CaSO4) on some soil prosperities, some plant elements, plant growth and grain yield of Sakha 104 rice cultivar, under saline soil conditions. A strip plot design, with four replicates, was used. The horizontal plots were devoted to irrigation intervals, however, the gypsum rates were allocated in the vertical plots. The soil of the experimental site was clayey and salinity levels were 7.5 and 7.3 dSm-1 in 2015 and 2016 seasons, respectively. The results obtained could be summarized as follows: Irrigation every three days increased chlorophyll content, LAI, plant height, number of tillers, panicle length, number of panicles, filled grains/panicle, panicle weight, 1000-grain weight, grain and straw yields as a compared with irrigation every nine days, which recorded the highest values of unfilled grains. Irrigation every three days significantly increased soil bulk density as well as Ca++ and K+ (in the soil and plant). However, it decreased the soil EC, Na+ (in the soil and plant) and Na/K ratio in the plant. Irrigation every three days consumed the highest amount of irrigation water, while prolonged irrigation intervals up to six and nine days tended to decrease the amount of water used. Furthermore, nine days treatment recorded the highest water use efficiency. Gypsum (as a soil amendment) rated 1.5 t1 CaSo4 ha- significantly raised all studied growth parameter (except plant height), grain yield and its components without any significant differences with 1.0 t ha-1 CaSo4 in some traits in both seasons. Gypsum at the rate of 1.5 t ha-1 CaSo4 mitigate the hazardous effect of salinity by decrease soil EC, Na+ (in the soil and plant) and Na/K ratio in the plant. Generally, under the same condition, irrigation every three days and gypsum at the rate of 1.5 t ha-1 CaSo4 are favorable for improve soil properties and enhance rice productivity under saline soil conditions.
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Claims 13
Claim · model-written summary
Three-day irrigation increased rice chlorophyll content and leaf area index relative to nine-day irrigation.
- Taxon
- rice
Oryza sativae0t0 - Treatment
- Irrigation every three dayse0
- Outcome
- chlorophyll content, LAIe0
- Direction
- increasede0
- Comparator
- irrigation every nine dayse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Irrigation every three days increased chlorophyll content, LAI, plant height, number of tillers, panicle length, number of panicles, filled grains/panicle, panicle weight, 1000-grain weight, grain and straw yields as a compared with irrigation every nine days”
t0“Rice”
Claim · model-written summary
Three-day irrigation increased rice height, tiller count and panicle length relative to nine-day irrigation.
- Taxon
- riceOryza sativae0t0
- Treatment
- Irrigation every three dayse0
- Outcome
- plant height, number of tillers, panicle lengthe0
- Direction
- increasede0
- Comparator
- irrigation every nine dayse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Irrigation every three days increased chlorophyll content, LAI, plant height, number of tillers, panicle length, number of panicles, filled grains/panicle, panicle weight, 1000-grain weight, grain and straw yields as a compared with irrigation every nine days”
t0“Rice”
Claim · model-written summary
Three-day irrigation increased panicle number, filled grains per panicle and panicle weight.
- Taxon
- riceOryza sativae0t0
- Treatment
- Irrigation every three dayse0
- Outcome
- number of panicles, filled grains/panicle, panicle weighte0
- Direction
- increasede0
- Comparator
- irrigation every nine dayse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Irrigation every three days increased chlorophyll content, LAI, plant height, number of tillers, panicle length, number of panicles, filled grains/panicle, panicle weight, 1000-grain weight, grain and straw yields as a compared with irrigation every nine days”
t0“Rice”
Claim · model-written summary
Three-day irrigation increased 1000-grain weight and grain and straw yields.
- Taxon
- riceOryza sativae0t0
- Treatment
- Irrigation every three dayse0
- Outcome
- 1000-grain weight, grain and straw yieldse0
- Direction
- increasede0
- Comparator
- irrigation every nine dayse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Irrigation every three days increased chlorophyll content, LAI, plant height, number of tillers, panicle length, number of panicles, filled grains/panicle, panicle weight, 1000-grain weight, grain and straw yields as a compared with irrigation every nine days”
t0“Rice”
Claim · model-written summary
Nine-day irrigation produced the highest unfilled-grain values.
- Taxon
- riceOryza sativae0t0
- Treatment
- irrigation every nine dayse0
- Outcome
- unfilled grainse0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“irrigation every nine days, which recorded the highest values of unfilled grains”
t0“Rice”
Claim · model-written summary
Three-day irrigation significantly increased soil bulk density and calcium and potassium in soil and plants.
- Taxon
- riceOryza sativae0t0
- Treatment
- Irrigation every three dayse0
- Outcome
- soil bulk density as well as Ca++ and K+ (in the soil and plant)e0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Irrigation every three days significantly increased soil bulk density as well as Ca++ and K+ (in the soil and plant)”
t0“Rice”
Claim · model-written summary
Three-day irrigation decreased soil EC, sodium in soil and plants, and plant sodium-to-potassium ratio.
- Taxon
- riceOryza sativae0t0
- Treatment
- Irrigation every three dayse0
- Outcome
- soil EC, Na+ (in the soil and plant) and Na/K ratio in the plante0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Irrigation every three days significantly increased soil bulk density as well as Ca++ and K+ (in the soil and plant). However, it decreased the soil EC, Na+ (in the soil and plant) and Na/K ratio in the plant”
t0“Rice”
Claim · model-written summary
Three-day irrigation consumed the most water.
- Taxon
- riceOryza sativae0t0
- Treatment
- Irrigation every three dayse0
- Outcome
- amount of irrigation watere0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Irrigation every three days consumed the highest amount of irrigation water”
t0“Rice”
Claim · model-written summary
Six- and nine-day intervals reduced water use.
- Taxon
- riceOryza sativae0t0
- Treatment
- prolonged irrigation intervals up to six and nine dayse0
- Outcome
- amount of water usede0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“prolonged irrigation intervals up to six and nine days tended to decrease the amount of water used”
t0“Rice”
Claim · model-written summary
Nine-day irrigation gave the highest water use efficiency.
- Taxon
- riceOryza sativae0t0
- Treatment
- nine days treatmente0
- Outcome
- water use efficiencye0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“nine days treatment recorded the highest water use efficiency”
t0“Rice”
Claim · model-written summary
Gypsum at 1.5 t ha-1 significantly increased rice growth parameters except height.
- Taxon
- riceOryza sativae0t0
- Treatment
- Gypsum (as a soil amendment) rated 1.5 t1 CaSo4 ha-e0
- Outcome
- all studied growth parameter (except plant height)e0
- Direction
- raisede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Gypsum (as a soil amendment) rated 1.5 t1 CaSo4 ha- significantly raised all studied growth parameter (except plant height), grain yield and its components”
t0“Rice”
Claim · model-written summary
Gypsum at 1.5 t ha-1 significantly increased rice grain yield and its components.
- Taxon
- riceOryza sativae0t0
- Treatment
- Gypsum (as a soil amendment) rated 1.5 t1 CaSo4 ha-e0
- Outcome
- grain yield and its componentse0
- Direction
- raisede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Gypsum (as a soil amendment) rated 1.5 t1 CaSo4 ha- significantly raised all studied growth parameter (except plant height), grain yield and its components”
t0“Rice”
Claim · model-written summary
Gypsum at 1.5 t ha-1 decreased soil EC, sodium in soil and plants, and plant sodium-to-potassium ratio.
- Taxon
- riceOryza sativae0t0
- Treatment
- Gypsum at the rate of 1.5 t ha-1 CaSo4e0
- Outcome
- soil EC, Na+ (in the soil and plant) and Na/K ratio in the plante0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Gypsum at the rate of 1.5 t ha-1 CaSo4 mitigate the hazardous effect of salinity by decrease soil EC, Na+ (in the soil and plant) and Na/K ratio in the plant”
t0“Rice”
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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.