Abstract
Jatropha is an oilseed culture that has been highlighted due some specific agronomic aspects. This plant produces high oil quantities in its seeds that is used for biodiesel production. One of the major challenges regarding to the Jatropha cultivation is the lack of information on many management techniques, especially the irrigation and pruning management in adult plants in southeastern Brazil. The objective of this study was to study the combined effect of irrigation history and different pruning on Jatropha plant growth and yield. The experiment was conducted during the 4th year of Jatropha growing season at University of Sao Paulo experimental area in Piracicaba, Brazil. The experiment was arranged in randomized block with four replications and treatments were considered the pruning type: No pruning (P1), pruning at 1.5 m high and 2 m canopy diameter (P2), pruning at 2 m high and 2 m canopy diameter (P3). In addition, two water conditions were also evaluated: Irrigated (I) and rainfed conditions (R). Plant growth (height and canopy diameter) and leaf area index (LAI) were evaluated monthly and productive variables were determined at the end of the experiment. Irrigation history influenced canopy diameter, absolute growth rates for plant height and canopy diameter, the relative growth rate for canopy diameter, and all productive variables. Pruning provided differences in all growth variables, where P2 presented the highest average on plant growth rates. The plants under irrigation history conditions showed the highest yield. Key words: Jatropha curcas L., oilseeds, center pivot, water management, biofuels.
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Claims 6
Claim · model-written summary
Irrigation history influenced Jatropha canopy diameter.
JatrophaNot reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Irrigation history influenced canopy diameter”
t0“jatropha”
Claim · model-written summary
Irrigation history influenced absolute growth rates for Jatropha plant height and canopy diameter and relative growth rate for canopy diameter.
- Treatment
- Irrigation historye0
- Outcome
- absolute growth rates for plant height and canopy diameter, the relative growth rate for canopy diametere0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Irrigation history influenced canopy diameter, absolute growth rates for plant height and canopy diameter, the relative growth rate for canopy diameter”
t0“jatropha”
Claim · model-written summary
Irrigation history influenced all measured Jatropha productive variables.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Irrigation history influenced canopy diameter, absolute growth rates for plant height and canopy diameter, the relative growth rate for canopy diameter, and all productive variables”
t0“jatropha”
Claim · model-written summary
Pruning produced differences in all measured Jatropha growth variables.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pruning provided differences in all growth variables”
t0“jatropha”
Claim · model-written summary
Pruning at 1.5 m high and 2 m canopy diameter had the highest average Jatropha plant growth rates.
- Treatment
- pruning at 1.5 m high and 2 m canopy diametere1
- Outcome
- plant growth ratese0
- Direction
- higheste0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“P2 presented the highest average on plant growth rates”
e1“pruning at 1.5 m high and 2 m canopy diameter (P2)”
t0“jatropha”
Claim · model-written summary
Jatropha plants with irrigation history showed the highest yield.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The plants under irrigation history conditions showed the highest yield”
t0“jatropha”
The same questions in other papers
pruning · growth · JatrophaPositive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- no effect
- positive
- positive
irrigation · yield · JatrophaResults agree
3 papers in the same direction as this paper
- positive
- positive
- positive
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.