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Global maximization of Jatropha oil production under semi‐arid conditions by balancing vegetative growth with reproductive capacity
Year:
2018
Source of publication :
GCB Bioenergy
Authors :
Bar-Tal, Asher
;
.
Samucha, Yael
;
.
Vaknin, Yiftach
;
.
Yermiyahu, Uri
;
.
Volume :
10
Co-Authors:
Facilitators :
From page:
382
To page:
392
(
Total pages:
11
)
Abstract:

Jatropha curcas L. is a drought tolerant crop that is globally cultivated under semiarid conditions as a biodiesel feedstock. Despite its great potential, however, many projects failed to reach commercially viable seed and oil yields. The aim of the study was to provide globally applicable solutions for maximization of Jatropha oil production under semiarid conditions. Under extremely low irrigation (10% of potential evapotranspiration; ETp), fruit production was very low and a surprisingly significant portion of the fruits delayed their maturity up to six months postbloom. Increasing irrigation to midlevel (60% ETp) significantly elevated fruit production and speeded up the ripening rate, whereas further increasing irrigation to a higher level (90% ETp) decreased seed and oil yields, probably due to the increased investment in vegetative growth. Nevertheless, maximal seed and oil yields at 60% ETp remained far below targeted yields. Coupling irrigation at 60% ETp, with induction of vegetative arrest, by soil application of a commercial gibberellin synthesis inhibitor, brought forward the second bloom period by two months, reduced vegetative growth, promoted floral production and significantly enhanced reproductive capacity by more than doubling oil production. The results show that under semiarid conditions, commercially viable seed and oil yields of Jatropha can be achieved by carefully balancing vegetative growth with reproductive capacity through the combined application of optimal irrigation regimes and induced vegetative arrest.

Note:
Related Files :
Arid zone agriculture
Jatropha
Jatropha
Jatropha curcas L
Show More
Related Content
More details
DOI :
https://doi.org/10.1111/gcbb.12497
Article number:
0
Affiliations:
Database:
Google Scholar
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
37137
Last updated date:
02/03/2022 17:27
Creation date:
05/09/2018 14:29
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Scientific Publication
Global maximization of Jatropha oil production under semi‐arid conditions by balancing vegetative growth with reproductive capacity
10
Global maximization of Jatropha oil production under semi‐arid conditions by balancing vegetative growth with reproductive capacity

Jatropha curcas L. is a drought tolerant crop that is globally cultivated under semiarid conditions as a biodiesel feedstock. Despite its great potential, however, many projects failed to reach commercially viable seed and oil yields. The aim of the study was to provide globally applicable solutions for maximization of Jatropha oil production under semiarid conditions. Under extremely low irrigation (10% of potential evapotranspiration; ETp), fruit production was very low and a surprisingly significant portion of the fruits delayed their maturity up to six months postbloom. Increasing irrigation to midlevel (60% ETp) significantly elevated fruit production and speeded up the ripening rate, whereas further increasing irrigation to a higher level (90% ETp) decreased seed and oil yields, probably due to the increased investment in vegetative growth. Nevertheless, maximal seed and oil yields at 60% ETp remained far below targeted yields. Coupling irrigation at 60% ETp, with induction of vegetative arrest, by soil application of a commercial gibberellin synthesis inhibitor, brought forward the second bloom period by two months, reduced vegetative growth, promoted floral production and significantly enhanced reproductive capacity by more than doubling oil production. The results show that under semiarid conditions, commercially viable seed and oil yields of Jatropha can be achieved by carefully balancing vegetative growth with reproductive capacity through the combined application of optimal irrigation regimes and induced vegetative arrest.

Scientific Publication
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