Abstract
Fertilizer management is one of the easiest and most practical ways of combating salt stress. This study was done to evaluate the alleviative effects of nitrogen and phosphorus on the growth and salt tolerance of salt-affected sorghum. A controlled study organized in a randomized block design with three replications was conducted, testing three nitrogen rates (N0: 0 kg ha−1, N1: 180 kg ha−1, N2: 360 N kg ha−1) and phosphorus rates (P0: 0 P2O5 kg ha−1, P1: 60 P2O5 kg ha−1, P2: 120 P2O5 kg ha−1). Nitrogen and phosphorus application had positive effects on morphological indexes (plant height, stem diameter), some physiological and biochemical attributes (the content of proline and soluble protein, and the activities of superoxide dismutase, catalase, peroxidase, and ascorbate peroxidase), and aerial biomass (fresh and dry weight) of sorghum grown in saline soils. Reactive oxygen species accumulation and cell membrane damage were decreased with the application of nitrogen and phosphorus. Compared with sole fertilizer, the combined application of nitrogen and phosphorus showed better performance in alleviating salt damage on sorghum. Despite the fact that the maximum of most of the measured parameters and the minimum of reactive oxygen species accumulation and cell membrane damage were generally obtained at N1P1 and N2P2 treatment, N1P1 was recommended to be the suitable treatment considering economic benefits and environmental protection.
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Claims 9
Claim · model-written summary
Nitrogen and phosphorus increased sorghum height and stem diameter in saline soil.
- Treatment
- Nitrogen and phosphorus applicatione0
- Outcome
- plant height, stem diametere0
- Direction
- positive effectse0
SorghumNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen and phosphorus application had positive effects on morphological indexes (plant height, stem diameter)”
t0“Sorghum”
Claim · model-written summary
Nitrogen and phosphorus improved proline and soluble protein contents.
- Outcome
- the content of proline and soluble proteine0
Not reportedTreatmentComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“some physiological and biochemical attributes (the content of proline and soluble protein”
t0“Sorghum”
Claim · model-written summary
Nitrogen and phosphorus improved antioxidant enzyme activities.
- Outcome
- activities of superoxide dismutase, catalase, peroxidase, and ascorbate peroxidasee0
Not reportedTreatmentComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“activities of superoxide dismutase, catalase, peroxidase, and ascorbate peroxidase”
t0“Sorghum”
Claim · model-written summary
Nitrogen and phosphorus increased aerial fresh and dry biomass.
- Outcome
- aerial biomass (fresh and dry weight)e0
Not reportedTreatmentComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“aerial biomass (fresh and dry weight) of sorghum grown in saline soils”
Claim · model-written summary
Nitrogen and phosphorus decreased reactive oxygen species accumulation.
- Treatment
- application of nitrogen and phosphoruse0
- Outcome
- Reactive oxygen species accumulatione0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Reactive oxygen species accumulation and cell membrane damage were decreased with the application of nitrogen and phosphorus.”
t0“Sorghum”
Claim · model-written summary
Nitrogen and phosphorus decreased cell membrane damage.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Reactive oxygen species accumulation and cell membrane damage were decreased with the application of nitrogen and phosphorus.”
t0“Sorghum”
Claim · model-written summary
Combined nitrogen and phosphorus alleviated salt damage better than sole fertilizer.
- Treatment
- combined application of nitrogen and phosphoruse0
- Outcome
- alleviating salt damagee0
- Direction
- better performancee0
- Comparator
- sole fertilizere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with sole fertilizer, the combined application of nitrogen and phosphorus showed better performance in alleviating salt damage on sorghum.”
Claim · model-written summary
Most parameters peaked and damage measures were lowest generally at N1P1 and N2P2.
- Treatment
- N1P1 and N2P2 treatmente0
- Outcome
- maximum of most of the measured parameters and the minimum of reactive oxygen species accumulation and cell membrane damagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the maximum of most of the measured parameters and the minimum of reactive oxygen species accumulation and cell membrane damage were generally obtained at N1P1 and N2P2 treatment”
t0“Sorghum”
Claim · model-written summary
The authors recommended N1P1 considering economics and environmental protection.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N1P1 was recommended to be the suitable treatment considering economic benefits and environmental protection”
t0“Sorghum”
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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.