Abstract
The objective of this study was to evaluate the use of subsoiling, gypsum and organic matter associated with the cultivation of cotton, sunflower and cowpea in crop rotation, seeking the reclamation and use of a saline-sodic soil. The treatments were arranged in a randomized block design in split plots with four replications, during two crop cycles (2009/2010 and 2010/2011). The plots were formed by the treatments: T1. Subsoiling (S); T2. S + 20 Mg ha-1 of gypsum; T3. S + 40 Mg ha-1 of organic matter; T4. S + 10 Mg ha-1 of gypsum + 20 Mg ha-1 of organic matter; T5. S + 20 Mg ha-1 of gypsum + 40 Mg ha-1 of organic matter and the sub-plots consisted of the cotton-cowpea (C/CP) and sunflower-cowpea (S/CP) crop rotation. The use of gypsum and organic matter contributed to decrease the soil salinity and sodicity. Cotton was not affected by the treatments, while the sunflower crop was favored by the application of amendments only in the second production cycle. Higher yields of cowpea in T5 treatment, during the 2009/2010 cycle, are indicative that higher doses of gypsum and organic matter applied in this treatment accelerate the reclamation process. For other treatments with amendment application there was a beneficial effect for this crop only in the second cycle, when the values of productivity were similar to T5.
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Claims 5
Claim · model-written summary
Gypsum and organic matter decreased soil salinity and sodicity.
- Taxon
- cotton, sunflower and cowpea
Gossypium hirsutum
Vigna unguiculata
Helianthus annuuse1 - Treatment
- gypsum and organic mattere0
- Outcome
- soil salinity and sodicitye0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The use of gypsum and organic matter contributed to decrease the soil salinity and sodicity”
e1“cultivation of cotton, sunflower and cowpea in crop rotation”
Claim · model-written summary
Cotton was not affected by the treatments.
- Taxon
- CottonGossypium hirsutume0
- Treatment
- treatmentse0
- Outcome
- Cottone0
- Direction
- not affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cotton was not affected by the treatments”
Claim · model-written summary
Sunflower benefited from amendments only in the second production cycle.
- Taxon
- sunflowerHelianthus annuuse0
- Treatment
- application of amendmentse0
- Outcome
- sunflower crope0
- Direction
- favorede0
- Qualifier
- only in the second production cyclee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the sunflower crop was favored by the application of amendments only in the second production cycle”
Claim · model-written summary
Cowpea yield was higher under T5 during 2009/2010.
- Taxon
- cowpeaVigna unguiculatae0
- Treatment
- T5 treatmente0
- Outcome
- yieldse0
- Direction
- Highere0
- Qualifier
- during the 2009/2010 cyclee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Higher yields of cowpea in T5 treatment, during the 2009/2010 cycle”
Claim · model-written summary
Other amendment treatments benefited cowpea only in the second cycle, with productivity similar to T5.
- Taxon
- cowpeaVigna unguiculatae1
- Treatment
- other treatments with amendment applicatione0
- Outcome
- productivitye0
- Direction
- similare0
- Comparator
- T5e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For other treatments with amendment application there was a beneficial effect for this crop only in the second cycle, when the values of productivity were similar to T5”
e1“Higher yields of cowpea in T5 treatment”
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