Abstract
The aim of this research was to evaluate the effects of different irrigation depths and potassium dosages, of Jatropha seed oil content and yield. The experimental design used was randomized blocks, in split-plots, with four replicates. The treatments were four water depths (plots) and four potassium dosages (subplots) applied through irrigation water. The water depths were applied based on the percentage of accumulated evaporation of a Class A (ECA) tank and of rainfall, as following: L0 = without irrigation, L40, L80 and L120, representing 40, 80 and 120% of the balance, respectively. The potassium dosages were K30, K60, K90 and K120 (30, 60, 90 and 120kg ha-1 of potassium, respectively). The oil extraction of samples was done through chemical extraction by organic solvent. The seeds used in this test were from the sampling of two seed productions from 2009, second year of crop production. It was possible to observe that irrigation use increased oil yield and decreased the oil content of Jatropha seed. Potassium fertilization did not influence oil content and yield. There was a relative increase of efficiency in water use producing oil until certain water depth, and after that there was a decrease.
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Claims 4
Claim · model-written summary
Irrigation use increased Jatropha oil yield.
JatrophaOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“It was possible to observe that irrigation use increased oil yield and decreased the oil content of Jatropha seed”
Claim · model-written summary
Irrigation use decreased the Jatropha seed oil content.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“It was possible to observe that irrigation use increased oil yield and decreased the oil content of Jatropha seed”
Claim · model-written summary
Potassium fertilization did not influence Jatropha oil content or oil yield.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Potassium fertilization did not influence oil content and yield”
e1“It was possible to observe that irrigation use increased oil yield and decreased the oil content of Jatropha seed”
Claim · model-written summary
Water use efficiency for oil production rose relatively with irrigation up to a certain water depth and fell after it.
- Treatment
- water depthe3
- Outcome
- efficiency in water use producing oile3
- Direction
- relative increasee3
- Qualifier
- until certain water depthe3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“There was a relative increase of efficiency in water use producing oil until certain water depth, and after that there was a decrease”
e1“It was possible to observe that irrigation use increased oil yield and decreased the oil content of Jatropha seed”