Abstract
A pot experiment was conducted in green-house of Soil and Water Research Department, NuclearResearchCenter, Abou-Zaabal, Egypt in winter 2016. Nitrogen fertilization management and irrigation water regime were as field practices were followed to improve sugar beet production under salinity stress condition. Sugar beet plants were irrigated with 8 and 16 dS m-1 saline water at 100%, 80% and 60% water regimes. Plants were fertilized with 100%, 80% and 50% of fertilizer-N recommended rates. Shoot dry weight was not significantly affected by experimental factors while root dry weight significantly but negatively affected by reduction in water quantities and raise of water salinity. On the other hand, dry weight of root of plants treated with N50 was superior over other N rats especially under W80 and W60 water regimes. Nitrogen uptake by shoot and roots was variably significantly affected by water and N fertilizer regimes under different water salinity levels. Based on mean averages of water and nitrogen treatments, W100, N80 and N100 interacted with salinity levels were the best treatments. Generally, N uptake was negatively affected by shortage in water requirement (regime). The highest values of N uptake by shoots of plants irrigated with 8 and 16 dS m-1 salinity levels were recorded with application of 50% N recommended rate. N80 and N100 interacted with salinity levels resulted in the best N uptake by root under W100, W80 and W60, respectively. Nitrogen derived from fertilizer (Ndff) by shoot tended to be reduced with irrigation water shortage up to W60 (water scarce). On the other hand, in most cases, Ndff values were increased with irrigation water salinity levels. It means that sugar beet as salinity tolerant plant acted well and able to gain more nitrogen from chemical fertilizer. More Ndff by shoot was gained when plants fertilized with either N80 or N50 rates. Ndff by root was negatively affected by shortage of water requirement and declined with increasing water salinity but enhanced with low rate of chemical fertilizer added especially at W100 regime. Interaction of salinity and nitrogen rates (S x N) resulted in the increase of %NUE with S8 and S16 salinity levels comparing to fresh water (FW) treatment. This was true, but in low extent, with W80 and W60 water regimes. The highest %NUE by root was recorded with N50 interacted with FW under W100 regime. It means that low N rates meet the plant demand without risk on production and achieved the most benefits from the added doses.
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Claims 19
Claim · model-written summary
Shoot dry weight was not significantly affected by the experimental factors.
- Taxon
- Sugar beet
Beta vulgaris subsp. vulgarise0 - Treatment
- experimental factorse1
- Outcome
- Shoot dry weighte1
- Direction
- not significantly affectede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sugar beet plants were irrigated with 8 and 16 dS m-1 saline water”
e1“Shoot dry weight was not significantly affected by experimental factors”
Claim · model-written summary
Reduction in water quantities significantly but negatively affected root dry weight.
- Taxon
- Sugar beetBeta vulgaris subsp. vulgarise0
- Treatment
- reduction in water quantitiese1
- Outcome
- root dry weighte1
- Direction
- negatively affectede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sugar beet plants were irrigated with 8 and 16 dS m-1 saline water”
e1“root dry weight significantly but negatively affected by reduction in water quantities and raise of water salinity”
Claim · model-written summary
Raising water salinity significantly but negatively affected root dry weight.
- Taxon
- Sugar beetBeta vulgaris subsp. vulgarise0
- Treatment
- raise of water salinitye1
- Outcome
- root dry weighte1
- Direction
- negatively affectede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sugar beet plants were irrigated with 8 and 16 dS m-1 saline water”
e1“root dry weight significantly but negatively affected by reduction in water quantities and raise of water salinity”
Claim · model-written summary
Root dry weight of plants treated with N50 was superior to other N rates, especially under W80 and W60 water regimes.
- Taxon
- Sugar beetBeta vulgaris subsp. vulgarise0
- Organ / stage
- roote1
- Treatment
- N50e1
- Outcome
- dry weight of roote1
- Direction
- superiore1
- Qualifier
- especially under W80 and W60 water regimese1
- Comparator
- other N ratse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sugar beet plants were irrigated with 8 and 16 dS m-1 saline water”
e1“dry weight of root of plants treated with N50 was superior over other N rats especially under W80 and W60 water regimes”
Claim · model-written summary
Nitrogen uptake by shoot and roots was variably and significantly affected by water and N fertilizer regimes under different salinity levels.
- Taxon
- Sugar beetBeta vulgaris subsp. vulgarise0
- Treatment
- water and N fertilizer regimese1
- Outcome
- Nitrogen uptake by shoot and rootse1
- Qualifier
- under different water salinity levelse1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sugar beet plants were irrigated with 8 and 16 dS m-1 saline water”
e1“Nitrogen uptake by shoot and roots was variably significantly affected by water and N fertilizer regimes under different water salinity levels”
Claim · model-written summary
The water and nitrogen treatments W100, N80 and N100 interacted with salinity levels were the best treatments.
- Taxon
- Sugar beetBeta vulgaris subsp. vulgarise0
- Treatment
- W100, N80 and N100 interacted with salinity levelse1
- Outcome
- treatmentse1
- Direction
- the beste1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sugar beet plants were irrigated with 8 and 16 dS m-1 saline water”
e1“Based on mean averages of water and nitrogen treatments, W100, N80 and N100 interacted with salinity levels were the best treatments”
Claim · model-written summary
Generally, N uptake was negatively affected by shortage in water requirement.
- Taxon
- Sugar beetBeta vulgaris subsp. vulgarise0
- Treatment
- shortage in water requiremente1
- Outcome
- N uptakee1
- Direction
- negatively affectede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sugar beet plants were irrigated with 8 and 16 dS m-1 saline water”
e1“Generally, N uptake was negatively affected by shortage in water requirement (regime)”
Claim · model-written summary
The highest N uptake by shoots under 8 and 16 dS m-1 salinity was recorded with 50% N recommended rate.
- Taxon
- Sugar beetBeta vulgaris subsp. vulgarise0
- Organ / stage
- shootse1
- Treatment
- application of 50% N recommended ratee1
- Outcome
- N uptake by shootse1
- Direction
- highest valuese1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sugar beet plants were irrigated with 8 and 16 dS m-1 saline water”
e1“The highest values of N uptake by shoots of plants irrigated with 8 and 16 dS m-1 salinity levels were recorded with application of 50% N recommended rate”
Claim · model-written summary
N80 and N100 interacted with salinity levels gave the best N uptake by root under W100, W80 and W60, respectively.
- Taxon
- Sugar beetBeta vulgaris subsp. vulgarise0
- Organ / stage
- roote1
- Treatment
- N80 and N100 interacted with salinity levelse1
- Outcome
- N uptake by roote1
- Direction
- beste1
- Qualifier
- under W100, W80 and W60, respectivelye1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sugar beet plants were irrigated with 8 and 16 dS m-1 saline water”
e1“N80 and N100 interacted with salinity levels resulted in the best N uptake by root under W100, W80 and W60, respectively”
Claim · model-written summary
Ndff by shoot tended to be reduced by irrigation water shortage up to W60.
- Taxon
- Sugar beetBeta vulgaris subsp. vulgarise0
- Treatment
- irrigation water shortagee1
- Outcome
- Nitrogen derived from fertilizer (Ndff) by shoote1
- Direction
- tended to be reducede1
- Qualifier
- up to W60 (water scarce)e1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sugar beet plants were irrigated with 8 and 16 dS m-1 saline water”
e1“Nitrogen derived from fertilizer (Ndff) by shoot tended to be reduced with irrigation water shortage up to W60 (water scarce)”
Claim · model-written summary
Ndff values were increased with irrigation water salinity levels in most cases.
- Taxon
- Sugar beetBeta vulgaris subsp. vulgarise0
- Treatment
- irrigation water salinity levelse1
- Outcome
- Ndff valuese1
- Direction
- increasede1
- Qualifier
- in most casese1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sugar beet plants were irrigated with 8 and 16 dS m-1 saline water”
e1“in most cases, Ndff values were increased with irrigation water salinity levels”
Claim · model-written summary
More Ndff by shoot was gained when plants were fertilized with either N80 or N50 rates.
- Taxon
- Sugar beetBeta vulgaris subsp. vulgarise0
- Treatment
- fertilized with either N80 or N50 ratese1
- Outcome
- Ndff by shoote1
- Direction
- Moree1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sugar beet plants were irrigated with 8 and 16 dS m-1 saline water”
e1“More Ndff by shoot was gained when plants fertilized with either N80 or N50 rates”
Claim · model-written summary
Ndff by root was negatively affected by shortage of water requirement.
- Taxon
- Sugar beetBeta vulgaris subsp. vulgarise0
- Treatment
- shortage of water requiremente1
- Outcome
- Ndff by roote1
- Direction
- negatively affectede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sugar beet plants were irrigated with 8 and 16 dS m-1 saline water”
e1“Ndff by root was negatively affected by shortage of water requirement and declined with increasing water salinity”
Claim · model-written summary
Ndff by root declined with increasing water salinity.
- Taxon
- Sugar beetBeta vulgaris subsp. vulgarise0
- Treatment
- increasing water salinitye1
- Outcome
- Ndff by roote1
- Direction
- declinede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sugar beet plants were irrigated with 8 and 16 dS m-1 saline water”
e1“Ndff by root was negatively affected by shortage of water requirement and declined with increasing water salinity”
Claim · model-written summary
Low rate of chemical fertilizer enhanced Ndff by root, especially at the W100 regime.
- Taxon
- Sugar beetBeta vulgaris subsp. vulgarise0
- Treatment
- low rate of chemical fertilizere1
- Outcome
- Ndff by roote1
- Direction
- enhancede1
- Qualifier
- especially at W100 regimee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sugar beet plants were irrigated with 8 and 16 dS m-1 saline water”
e1“Ndff by root was negatively affected by shortage of water requirement and declined with increasing water salinity but enhanced with low rate of chemical fertilizer added especially at W100 regime”
Claim · model-written summary
The interaction of salinity and N rates (S x N) increased %NUE at S8 and S16 salinity levels compared with fresh water.
- Taxon
- Sugar beetBeta vulgaris subsp. vulgarise0
- Treatment
- Interaction of salinity and nitrogen rates (S x N)e1
- Outcome
- %NUEe1
- Direction
- increasee1
- Qualifier
- with S8 and S16 salinity levelse1
- Comparator
- fresh water (FW) treatmente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sugar beet plants were irrigated with 8 and 16 dS m-1 saline water”
e1“Interaction of salinity and nitrogen rates (S x N) resulted in the increase of %NUE with S8 and S16 salinity levels comparing to fresh water (FW) treatment”
Claim · model-written summary
The S x N interaction increase in %NUE was true, but to a low extent, under W80 and W60 water regimes.
- Taxon
- Sugar beetBeta vulgaris subsp. vulgarise0
- Treatment
- Interaction of salinity and nitrogen rates (S x N)e1
- Outcome
- %NUEe1
- Direction
- increasee1
- Qualifier
- in low extent, with W80 and W60 water regimese1
- Comparator
- fresh water (FW) treatmente1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sugar beet plants were irrigated with 8 and 16 dS m-1 saline water”
e1“Interaction of salinity and nitrogen rates (S x N) resulted in the increase of %NUE with S8 and S16 salinity levels comparing to fresh water (FW) treatment. This was true, but in low extent, with W80 and W60 water regimes”
Claim · model-written summary
The highest %NUE by root was recorded with N50 interacted with fresh water under W100 regime.
- Taxon
- Sugar beetBeta vulgaris subsp. vulgarise0
- Organ / stage
- roote1
- Treatment
- N50 interacted with FWe1
- Outcome
- %NUE by roote1
- Direction
- higheste1
- Qualifier
- under W100 regimee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sugar beet plants were irrigated with 8 and 16 dS m-1 saline water”
e1“The highest %NUE by root was recorded with N50 interacted with FW under W100 regime”
Claim · model-written summary
The authors recommend low N rates, which meet the plant demand without risk on production.
- Taxon
- Sugar beetBeta vulgaris subsp. vulgarise0
- Outcome
- low N ratese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sugar beet plants were irrigated with 8 and 16 dS m-1 saline water”
e1“It means that low N rates meet the plant demand without risk on production and achieved the most benefits from the added doses”
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