Abstract
This study aimed to determine the optimal soil water conditions for J. curcas L. cultivation under the bi-annual rain seasons of the African Savannah climate. Changes in J. curcas L. seedling biomass and mineral nutrient uptake and movement patterns were examined under soil water matric potentials of-2.5,-2.9,-3.4 and-4.0kPa, and two rain seasons separated by a dry spell. The bi-annual savannah rain conditions were simulated using automated buried-type tensiometer system. During the first rain season (irrigation),-3.4kPa soil water matric potential showed the highest water-use efficiency (2.44 g dry weight L-) and biomass yield (57.14g). Seedlings were variously affected by the subsequent dry spell, including total defoliation and stunting. On re-irrigation, seedling recovery (biomass and water use efficiency) was less as compared to the first rain season. Among the nutrients monitored, N, P and K were the most predominantly uptaken, with N showing the closest correlation with seedling growth. Soil matric water potential of －3.4 kPa is the optimum soil water environment for J. curcas cultivation in the savannah conditions; additionally,
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Claims 9
Claim · model-written summary
At -3.4 kPa during the first irrigated rain season, seedlings had the highest water-use efficiency of 2.44 g dry weight L-.
- Taxon
- Jatropha curcas L.
_tree_at_Samedha.jpg?width=60)
Jatropha curcast0 - Treatment
- -3.4kPa soil water matric potentiale0
- Outcome
- water-use efficiencye0
- Direction
- higheste0
- Value
- 2.44 g dry weight L-e0
- Setting
- first rain season (irrigation)e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_tree_at_Samedha.jpg?width=500)
Verbatim
e0“During the first rain season (irrigation),-3.4kPa soil water matric potential showed the highest water-use efficiency (2.44 g dry weight L-)”
t0“Jatropha curcas L.”
Claim · model-written summary
At -3.4 kPa during the first irrigated rain season, seedlings had the highest biomass yield of 57.14g.
- Taxon
- Jatropha curcas L.Jatropha curcast0
- Treatment
- -3.4kPa soil water matric potentiale0
- Outcome
- biomass yielde0
- Direction
- higheste0
- Value
- 57.14ge0
- Setting
- first rain season (irrigation)e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“During the first rain season (irrigation),-3.4kPa soil water matric potential showed the highest water-use efficiency (2.44 g dry weight L-) and biomass yield (57.14g)”
t0“Jatropha curcas L.”
Claim · model-written summary
The subsequent dry spell caused total defoliation in some seedlings.
- Taxon
- Jatropha curcas L.Jatropha curcast0
- Treatment
- subsequent dry spelle0
- Outcome
- total defoliatione0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seedlings were variously affected by the subsequent dry spell, including total defoliation and stunting.”
t0“Jatropha curcas L.”
Claim · model-written summary
The subsequent dry spell caused stunting in some seedlings.
- Taxon
- Jatropha curcas L.Jatropha curcast0
- Treatment
- subsequent dry spelle0
- Outcome
- stuntinge0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Seedlings were variously affected by the subsequent dry spell, including total defoliation and stunting.”
t0“Jatropha curcas L.”
Claim · model-written summary
On re-irrigation, seedling biomass recovery was less than in the first rain season.
- Taxon
- Jatropha curcas L.Jatropha curcast0
- Treatment
- re-irrigatione0
- Outcome
- biomasse0
- Direction
- lesse0
- Comparator
- first rain seasone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“On re-irrigation, seedling recovery (biomass and water use efficiency) was less as compared to the first rain season.”
t0“Jatropha curcas L.”
Claim · model-written summary
On re-irrigation, seedling water-use-efficiency recovery was less than in the first rain season.
- Taxon
- Jatropha curcas L.Jatropha curcast0
- Treatment
- re-irrigatione0
- Outcome
- water use efficiencye0
- Direction
- lesse0
- Comparator
- first rain seasone0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“On re-irrigation, seedling recovery (biomass and water use efficiency) was less as compared to the first rain season.”
t0“Jatropha curcas L.”
Claim · model-written summary
N, P and K were the nutrients most predominantly taken up by seedlings.
- Taxon
- Jatropha curcas L.Jatropha curcast0
- Outcome
- N, P and K were the most predominantly uptakene0
- Direction
- most predominantlye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Among the nutrients monitored, N, P and K were the most predominantly uptaken”
t0“Jatropha curcas L.”
Claim · model-written summary
Nitrogen uptake had the closest correlation with seedling growth.
- Taxon
- Jatropha curcas L.Jatropha curcast0
- Compound
- Ne0
- Outcome
- seedling growthe0
- Direction
- closest correlatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N showing the closest correlation with seedling growth”
e1“Among the nutrients monitored, N, P and K were the most predominantly uptaken, with N showing the closest correlation with seedling growth.”
t0“Jatropha curcas L.”
Claim · model-written summary
The authors identify -3.4 kPa soil matric potential as optimal for Jatropha cultivation under savanna conditions.
- Taxon
- J. curcasJatropha curcase0
- Treatment
- －3.4 kPae0
- Outcome
- optimum soil water environmente0
- Setting
- savannah conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soil matric water potential of －3.4 kPa is the optimum soil water environment for J. curcas cultivation in the savannah conditions”
t0“Jatropha curcas L.”
The same questions in other papers
soil water · yield · Jatropha curcasPositive and negative results
1 in the opposite direction
- no effect
drought · pest · Jatropha curcasResults agree
1 paper in the same direction as this paper
- negative
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.