Abstract
A field study was conducted to determine the effect of organic and mineral-based fertilizers on phytochemical contents in the tubers of two cassava varieties. Treatments were arranged in a split plot design with three replicates. The main plot was fertilizer source (vermicompost, empty fruit bunch compost and inorganic fertilizer) and sub-plot was cassava variety (Medan and Sri Pontian). The amount of fertilizer applied was based on 180 kg K(2)O ha-1. The tubers were harvested and analyzed for total flavonoids, total phenolics, antioxidant activity and cyanogenic glucoside content. Total phenolic and flavonoid compounds were determined using the Folin-Ciocalteu assay and aluminium chloride colorimetric method, respectively. Different sources of fertilizer, varieties and their interactions were found to have a significant effect on phytochemical content. The phenolic and flavonoid content were significantly higher (p < 0.01) in the vermicompost treatment compared to mineral fertilizer and EFB compost. The total flavonoids and phenolics content of vermicompost treated plants were 39% and 38% higher, respectively, than those chemically fertilized. The antioxidant activity determined using the DPPH and FRAP assays were high with application of organic fertilizer. Cyanogenic glycoside levels were decreased with the application of organic fertilizer. Among the two types of compost, vermicompost resulted in higher nutritional value of cassava tubers. Medan variety with application of vermicompost showed the most promising nutritional quality. Since the nutritional quality of cassava can be improved by organic fertilization, organic fertilizer should be used in place of chemical fertilizer for environmentally sustainable production of better quality cassava.
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Claims 10
Claim · model-written summary
Fertilizer source, cassava variety and their interaction significantly affected phytochemical content.
- Taxon
- cassava
Manihot esculentat0 - Material
- varietiese0
- Treatment
- sources of fertilizere0
- Outcome
- phytochemical contente0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Different sources of fertilizer, varieties and their interactions were found to have a significant effect on phytochemical content.”
t0“cassava varieties”
Claim · model-written summary
Vermicompost gave higher tuber phenolic content than mineral fertilizer and EFB compost.
- Taxon
- cassavaManihot esculentat0
- Treatment
- vermicompost treatmente0
- Outcome
- phenolice0
- Direction
- highere0
- Comparator
- mineral fertilizer and EFB composte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The phenolic and flavonoid content were significantly higher (p < 0.01) in the vermicompost treatment compared to mineral fertilizer and EFB compost.”
t0“cassava varieties”
Claim · model-written summary
Vermicompost gave higher tuber flavonoid content than mineral fertilizer and EFB compost.
- Taxon
- cassavaManihot esculentat0
- Treatment
- vermicompost treatmente0
- Outcome
- flavonoid contente0
- Direction
- highere0
- Comparator
- mineral fertilizer and EFB composte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The phenolic and flavonoid content were significantly higher (p < 0.01) in the vermicompost treatment compared to mineral fertilizer and EFB compost.”
t0“cassava varieties”
Claim · model-written summary
Vermicompost treated cassava had 39% higher total flavonoids than chemically fertilized plants.
- Taxon
- cassavaManihot esculentat0
- Treatment
- vermicomposte0
- Outcome
- total flavonoidse0
- Direction
- highere0
- Value
- 39%e0
- Comparator
- chemically fertilizede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The total flavonoids and phenolics content of vermicompost treated plants were 39% and 38% higher, respectively, than those chemically fertilized.”
t0“cassava varieties”
Claim · model-written summary
Vermicompost treated cassava had 38% higher phenolic content than chemically fertilized plants.
- Taxon
- cassavaManihot esculentat0
- Treatment
- vermicomposte0
- Outcome
- phenolics contente0
- Direction
- highere0
- Value
- 38%e0
- Comparator
- chemically fertilizede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The total flavonoids and phenolics content of vermicompost treated plants were 39% and 38% higher, respectively, than those chemically fertilized.”
t0“cassava varieties”
Claim · model-written summary
Organic fertilizer application yielded high antioxidant activity in cassava tubers by DPPH and FRAP assays.
- Taxon
- cassavaManihot esculentat0
- Treatment
- organic fertilizere0
- Outcome
- antioxidant activitye0
- Direction
- highe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The antioxidant activity determined using the DPPH and FRAP assays were high with application of organic fertilizer.”
t0“cassava varieties”
Claim · model-written summary
Organic fertilizer decreased cyanogenic glycoside levels in cassava tubers.
- Taxon
- cassavaManihot esculentat0
- Treatment
- organic fertilizere0
- Outcome
- Cyanogenic glycoside levelse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cyanogenic glycoside levels were decreased with the application of organic fertilizer.”
t0“cassava varieties”
Claim · model-written summary
Vermicompost gave cassava tubers higher nutritional value than the other compost.
- Taxon
- cassavaManihot esculentae0
- Treatment
- vermicomposte0
- Outcome
- nutritional valuee0
- Direction
- highere0
- Comparator
- two types of composte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Among the two types of compost, vermicompost resulted in higher nutritional value of cassava tubers.”
Claim · model-written summary
Medan cassava given vermicompost showed the most promising nutritional quality.
- Taxon
- cassavaManihot esculentat0
- Material
- Medan varietye0
- Treatment
- vermicomposte0
- Outcome
- nutritional qualitye0
- Direction
- most promisinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Medan variety with application of vermicompost showed the most promising nutritional quality.”
t0“cassava varieties”
Claim · model-written summary
The authors recommend organic instead of chemical fertilizer for sustainable production of better quality cassava.
- Taxon
- cassavaManihot esculentae0
- Treatment
- organic fertilizere0
- Outcome
- environmentally sustainable production of better quality cassavae0
- Comparator
- chemical fertilizere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“organic fertilizer should be used in place of chemical fertilizer for environmentally sustainable production of better quality cassava.”
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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.