Abstract
In this study, we investigated the impact of different irrigation regimes and fertilizer treatments on the yield, oil composition, and biodiesel production of rapeseed (Brassica napus). The experiment was conducted over two years (2020–2021) using a split-plot design. The main plots were assigned four irrigation regimes (70, 100, 130, and 160 mm evaporation), while the sub-plots were allocated five fertilizer treatments (no fertilizer, chemical fertilizers, plant growth-promoting rhizobacteria (PGPR) inoculation, vermicompost, and a combination of fertilizers). Our findings indicate that water limitation decreased the nutrient content, grain weight, oil content, and yield of rapeseed. However, it also increased the oleic acid, oleic/(linoleic+linolenic) ratio, and biodiesel yield. The use of chemical fertilizers negatively impacted the quality of rapeseed oil. In contrast, PGPR inoculation, particularly in combination with other fertilizers, increased the grain yield, oil content, and quality, as well as biodiesel production by improving nutrient uptake. An integrated fertilizer management approach can enhance the yield and quality of rapeseed oil while minimizing the use of chemical fertilizers. This approach promotes sustainable production in arid and semi-arid regions. Our research led to a 67% reduction in chemical fertilizer usage while increasing biodiesel production. Furthermore, our study highlights the significance of using PGPR and vermicompost in combination to improve the nutritional uptake and oil composition of rapeseed. Overall, our study provides valuable insights into optimizing irrigation and fertilizer management for rapeseed cultivation. These insights have implications for sustainable agriculture practices in similar environments.
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Claims 10
Claim · model-written summary
Water limitation decreased rapeseed nutrient content, grain weight, oil content and yield.
- Taxon
- rapeseedt0
- Treatment
- water limitatione0
- Outcome
- nutrient content, grain weight, oil content, and yielde0
- Direction
- decreasede0
Not reportedComparator
Verbatim
e0“water limitation decreased the nutrient content, grain weight, oil content, and yield of rapeseed.”
t0“rapeseed”
Claim · model-written summary
Water limitation increased rapeseed oleic acid and oleic/(linoleic+linolenic) ratio.
- Taxon
- rapeseedt0
- Treatment
- water limitatione1
- Outcome
- oleic acid, oleic/(linoleic+linolenic) ratioe0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“it also increased the oleic acid, oleic/(linoleic+linolenic) ratio, and biodiesel yield.”
t0“rapeseed”
e1“water limitation decreased the nutrient content”
Claim · model-written summary
Water limitation increased biodiesel yield.
Not reportedComparator
Verbatim
e0“it also increased the oleic acid, oleic/(linoleic+linolenic) ratio, and biodiesel yield.”
t0“rapeseed”
e1“water limitation decreased the nutrient content”
Claim · model-written summary
Chemical fertilizers negatively affected rapeseed oil quality.
- Taxon
- rapeseedt0
- Treatment
- chemical fertilizerse0
- Outcome
- quality of rapeseed oile0
- Direction
- negatively impactede0
Not reportedComparator
Verbatim
e0“The use of chemical fertilizers negatively impacted the quality of rapeseed oil.”
t0“rapeseed”
Claim · model-written summary
PGPR inoculation, especially with other fertilizers, increased grain yield and oil content.
- Taxon
- rapeseedt0
- Treatment
- PGPR inoculatione0
- Interactor
- PGPRe0symbiont
- Outcome
- grain yield, oil content, and qualitye0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“PGPR inoculation, particularly in combination with other fertilizers, increased the grain yield, oil content, and quality, as well as biodiesel production by improving nutrient uptake.”
t0“rapeseed”
Claim · model-written summary
PGPR inoculation increased biodiesel production.
- Taxon
- rapeseedt0
- Treatment
- PGPR inoculatione0
- Interactor
- PGPRe0symbiont
- Outcome
- biodiesel productione0
- Direction
- increasede0
Not reportedComparator
Verbatim
e0“PGPR inoculation, particularly in combination with other fertilizers, increased the grain yield, oil content, and quality, as well as biodiesel production by improving nutrient uptake.”
t0“rapeseed”
Claim · model-written summary
PGPR inoculation improved nutrient uptake.
- Taxon
- rapeseedt0
- Treatment
- PGPR inoculatione0
- Interactor
- PGPRe0symbiont
- Outcome
- nutrient uptakee0
- Direction
- improvinge0
Not reportedComparator
Verbatim
e0“PGPR inoculation, particularly in combination with other fertilizers, increased the grain yield, oil content, and quality, as well as biodiesel production by improving nutrient uptake.”
t0“rapeseed”
Claim · model-written summary
The study reduced chemical fertilizer use by 67% while increasing biodiesel production.
- Taxon
- rapeseedt0
- Treatment
- chemical fertilizere0
- Outcome
- chemical fertilizer usagee0
- Direction
- reductione0
- Value
- 67%e0
Not reportedComparator
Verbatim
e0“Our research led to a 67% reduction in chemical fertilizer usage while increasing biodiesel production.”
t0“rapeseed”
e1“rapeseed (Brassica napus)”
Claim · model-written summary
Combined PGPR and vermicompost improved rapeseed nutritional uptake and oil composition.
- Taxon
- rapeseedt0
- Treatment
- PGPR and vermicompost in combinatione0
- Interactor
- PGPRe0symbiont
- Outcome
- nutritional uptake and oil compositione0
- Direction
- improvee0
Not reportedComparator
Verbatim
e0“using PGPR and vermicompost in combination to improve the nutritional uptake and oil composition of rapeseed.”
t0“rapeseed”
Claim · model-written summary
The authors recommend integrated fertilizer management for rapeseed oil yield and quality while reducing chemical fertilizer use.
Verbatim
e0“An integrated fertilizer management approach can enhance the yield and quality of rapeseed oil while minimizing the use of chemical fertilizers.”
t0“rapeseed”
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See all 55 papers →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.