Abstract
The objective of this work was to study the effects of irrigation with saline water associated with phosphate fertilization on the emergence and early growth of cowpea plants. The assay was conducted in the greenhouse of the Department of Environmental Sciences and Technology of the Federal Rural University of the Semi-Arid (UFERSA) in Mossoró-RN, during October and November of 2015. The study adopted a randomized block with treatments arranged in a 5 x 3 grid, corresponding to five levels of water salinity (0.5, 1.5, 2.5, 3.5 and 4.5 dS m-1) and three doses of superphosphate, based upon the soil analysis (60%, 100% and 140% of the recommended dose for the crop 60 kg P2O5 ha-1), with five repetitions. The cowpea plants, cv. Paulistinha, were grown in lysimeters with capacity of 8 dm3. During the first 15 days of the initial stage of development the plants were evaluated for emergence, growth and biomass accumulation. The increase in water salinity above 1.5 dSm-1 reduced the emergence, growth and dry matter accumulation of cowpea plants. The increase of 40% in the recommendation of phosphorus fertilization of cowpea increased the growth and biomass accumulation of shoot plants, regardless of salinity.
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Claims 3
Claim · model-written summary
Water salinity above 1.5 dSm-1 reduced cowpea emergence.
- Taxon
- cowpea plants
Vigna unguiculatae0 - Material
- cv. Paulistinhae1
- Treatment
- water salinity above 1.5 dSm-1e0
- Outcome
- emergencee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increase in water salinity above 1.5 dSm-1 reduced the emergence, growth and dry matter accumulation of cowpea plants.”
t0“cowpea plants”
e1“The cowpea plants, cv. Paulistinha, were grown in lysimeters with capacity of 8 dm3.”
Claim · model-written summary
Water salinity above 1.5 dSm-1 reduced cowpea growth and dry matter accumulation.
- Taxon
- cowpea plantsVigna unguiculatae0
- Treatment
- water salinity above 1.5 dSm-1e0
- Outcome
- growth and dry matter accumulatione0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increase in water salinity above 1.5 dSm-1 reduced the emergence, growth and dry matter accumulation of cowpea plants.”
Claim · model-written summary
Phosphorus fertilization at 40% above recommendation increased cowpea shoot growth and biomass regardless of salinity.
- Taxon
- cowpeaVigna unguiculatae0
- Treatment
- increase of 40% in the recommendation of phosphorus fertilizatione0
- Outcome
- growth and biomass accumulation of shoot plantse0
- Direction
- increasede0
- Value
- 40%e0
- Qualifier
- regardless of salinitye0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increase of 40% in the recommendation of phosphorus fertilization of cowpea increased the growth and biomass accumulation of shoot plants, regardless of salinity.”
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