Abstract
Due to the demand in biofuel, the plant species that are not eatable and do not compete with traditional crops in Colombia, such as Jatropha curcas L., have become an important option. To produce more knowledge on the growth of this species, the research was carried out with different amounts of N and K fertilizers applied during the first 435 days after sowing (das) under dry tropical forest conditions. With the highest N dose (150 kg ha-1), the largest leaf area index was obtained in all evaluation period. The highest net assimilation rate (NAR) values were seen in the treatment with 150 kg ha-1 of N at 75 das, 1.852 g m-2 d-1, with no differences presented among the treatments with fertilizer application. The highest absolute growth rate (AGR) was observed when 150 kg ha-1 of N+180 kg ha-1of K2O were applied at the start of the reproductive phase (345 das), 24.5 g d-1. The specific leaf area (SLA) did not present a response to the treatments. The relative growth rate (RGR) reached zero value at 402 das for the plants without fertilizers. The accumulation of biomass in J. curcas was influenced by the fertilizers with N and K, presenting rapid initial vegetative growth (first 165 das) which decreased with the starting of the reproductive phase.
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Claims 8
Claim · model-written summary
The highest N dose produced the largest leaf area index throughout evaluation.
- Taxon
- Jatropha curcas L.
_tree_at_Samedha.jpg?width=60)
Jatropha curcast0 - Treatment
- highest N dose (150 kg ha-1)e0
- Outcome
- leaf area indexe0
- Direction
- largeste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_tree_at_Samedha.jpg?width=500)
Verbatim
e0“With the highest N dose (150 kg ha-1), the largest leaf area index was obtained in all evaluation period.”
t0“Growth of Jatropha curcas L. fertilized with nitrogen and potassium under conditions of dry tropical forest of Colombia”
Claim · model-written summary
At 75 das, 150 kg ha-1 N produced the highest NAR, 1.852 g m-2 d-1.
- Taxon
- Jatropha curcas L.Jatropha curcast0
- Treatment
- 150 kg ha-1 of Ne0
- Outcome
- net assimilation ratee0
- Direction
- higheste0
- Value
- 1.852 g m-2 d-1e0
- Qualifier
- 75 dase0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest net assimilation rate (NAR) values were seen in the treatment with 150 kg ha-1 of N at 75 das, 1.852 g m-2 d-1, with no differences presented among the treatments with fertilizer application.”
t0“Growth of Jatropha curcas L. fertilized with nitrogen and potassium under conditions of dry tropical forest of Colombia”
Claim · model-written summary
NAR did not differ among fertilizer treatments.
- Taxon
- Jatropha curcas L.Jatropha curcast0
- Treatment
- treatments with fertilizer applicatione0
- Outcome
- net assimilation ratet1
- Direction
- no differencese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“with no differences presented among the treatments with fertilizer application.”
t0“Growth of Jatropha curcas L. fertilized with nitrogen and potassium under conditions of dry tropical forest of Colombia”
t1“The highest net assimilation rate (NAR) values were seen in the treatment with 150 kg ha-1 of N at 75 das, 1.852 g m-2 d-1, with no differences presented among the treatments with fertilizer application.”
Claim · model-written summary
At 345 das, N plus K2O produced the highest AGR of 24.5 g d-1.
- Taxon
- Jatropha curcas L.Jatropha curcast0
- Treatment
- 150 kg ha-1 of N+180 kg ha-1of K2Oe0
- Outcome
- absolute growth ratee0
- Direction
- higheste0
- Value
- 24.5 g d-1e0
- Qualifier
- 345 dase0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The highest absolute growth rate (AGR) was observed when 150 kg ha-1 of N+180 kg ha-1of K2O were applied at the start of the reproductive phase (345 das), 24.5 g d-1.”
t0“Growth of Jatropha curcas L. fertilized with nitrogen and potassium under conditions of dry tropical forest of Colombia”
Claim · model-written summary
Specific leaf area did not respond to fertilizer treatments.
- Taxon
- Jatropha curcas L.Jatropha curcast0
- Treatment
- treatmentse0
- Outcome
- specific leaf areae0
- Direction
- did not present a responsee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The specific leaf area (SLA) did not present a response to the treatments.”
t0“Growth of Jatropha curcas L. fertilized with nitrogen and potassium under conditions of dry tropical forest of Colombia”
Claim · model-written summary
Without fertilizer, RGR reached zero at 402 das.
- Taxon
- Jatropha curcas L.Jatropha curcast0
- Outcome
- relative growth ratee0
- Value
- zero valuee0
- Qualifier
- 402 das for the plants without fertilizerse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The relative growth rate (RGR) reached zero value at 402 das for the plants without fertilizers.”
t0“Growth of Jatropha curcas L. fertilized with nitrogen and potassium under conditions of dry tropical forest of Colombia”
Claim · model-written summary
N and K fertilizers influenced biomass accumulation.
- Taxon
- J. curcasJatropha curcase0
- Treatment
- fertilizers with N and Ke0
- Outcome
- accumulation of biomasse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The accumulation of biomass in J. curcas was influenced by the fertilizers with N and K, presenting rapid initial vegetative growth (first 165 das) which decreased with the starting of the reproductive phase.”
Claim · model-written summary
Vegetative growth was rapid during the first 165 das and decreased at the reproductive phase.
- Taxon
- Jatropha curcas L.Jatropha curcast0
- Outcome
- vegetative growthe0
- Direction
- decreasede0
- Qualifier
- first 165 dase0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“presenting rapid initial vegetative growth (first 165 das) which decreased with the starting of the reproductive phase.”
t0“Growth of Jatropha curcas L. fertilized with nitrogen and potassium under conditions of dry tropical forest of Colombia”
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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.