Abstract
The experiment studied the effect of harvesting frequencies and varieties on yield, chemical composition and hydrogen cyanide content in cassava foliage. Foliage from three cassava varieties, K94 (very bitter), K98-7 (medium bitter) and a local (sweet), were harvested in three different cutting cycles, at 3, 6 and 9 months; 6 and 9 months and 9 months after planting, in a 2-yr experiment carried out in Hanoi, Vietnam. Increasing the harvesting frequency increased dry matter (DM) and crude protein (CP) production in cassava foliage. The K94 variety produced higher foliage yields than the other two varieties. Dry matter, neutral detergent fibre (NDF), acid detergent fibre (ADF) and total tannin content increased with months to the first harvest, whereas CP content decreased. Hydrogen cyanide (HCN) content was lower at the first harvest than at later harvests for all cutting cycles. At subsequent harvests the content of total tannins tended to decline, while HCN content increased (p<0.05). Chemical composition differed somewhat across varieties except for total tannins and ash. Dry matter, NDF, ADF and total tannins were higher in fully matured leaves, while CP and HCN were lower in developing leaves.
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Claims 10
Claim · model-written summary
More frequent harvest increased foliage dry matter and crude protein production.
- Taxon
- cassava
Manihot esculentae0 - Treatment
- Increasing the harvesting frequencye0
- Outcome
- dry matter (DM) and crude protein (CP) productione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increasing the harvesting frequency increased dry matter (DM) and crude protein (CP) production in cassava foliage”
Claim · model-written summary
K94 produced higher foliage yield than the other two varieties.
- Taxon
- CassavaManihot esculentat0
- Material
- K94e0
- Outcome
- foliage yieldse0
- Direction
- highere0
- Comparator
- other two varietiese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The K94 variety produced higher foliage yields than the other two varieties”
t0“Cassava”
Claim · model-written summary
Dry matter, NDF, ADF and tannins increased with months to first harvest.
- Taxon
- CassavaManihot esculentat0
- Treatment
- months to the first harveste0
- Outcome
- Dry matter, neutral detergent fibre (NDF), acid detergent fibre (ADF) and total tannin contente0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dry matter, neutral detergent fibre (NDF), acid detergent fibre (ADF) and total tannin content increased with months to the first harvest”
t0“Cassava”
Claim · model-written summary
Crude protein decreased with months to first harvest.
- Taxon
- CassavaManihot esculentat0
- Outcome
- CP contente0
- Direction
- decreasede0
Not reportedMaterialGeneCompoundOrgan / stageInteractorTreatmentComparatorSetting
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CP content decreased”
t0“Cassava”
Claim · model-written summary
Hydrogen cyanide was lower at first harvest than later harvests.
- Taxon
- CassavaManihot esculentat0
- Outcome
- Hydrogen cyanide (HCN) contente0
- Direction
- lowere0
- Comparator
- later harvestse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Hydrogen cyanide (HCN) content was lower at the first harvest than at later harvests for all cutting cycles”
t0“Cassava”
Claim · model-written summary
Total tannins tended to decline at subsequent harvests.
- Taxon
- CassavaManihot esculentat0
- Outcome
- content of total tanninse0
- Direction
- declinee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At subsequent harvests the content of total tannins tended to decline”
t0“Cassava”
Claim · model-written summary
Hydrogen cyanide increased at subsequent harvests.
- Taxon
- CassavaManihot esculentat0
- Outcome
- HCN contente0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“HCN content increased (p<0.05)”
t0“Cassava”
Claim · model-written summary
Chemical composition differed across varieties except tannins and ash.
- Taxon
- CassavaManihot esculentat0
- Outcome
- Chemical compositione0
- Direction
- differede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chemical composition differed somewhat across varieties except for total tannins and ash”
t0“Cassava”
Claim · model-written summary
Mature leaves had higher dry matter, NDF, ADF and tannins.
- Taxon
- CassavaManihot esculentat0
- Organ / stage
- fully matured leavese0
- Outcome
- Dry matter, NDF, ADF and total tanninse0
- Direction
- highere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Dry matter, NDF, ADF and total tannins were higher in fully matured leaves”
t0“Cassava”
Claim · model-written summary
Developing leaves had lower crude protein and hydrogen cyanide.
- Taxon
- CassavaManihot esculentat0
- Organ / stage
- developing leavese0
- Outcome
- CP and HCNe0
- Direction
- lowere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“CP and HCN were lower in developing leaves”
t0“Cassava”
The same questions in other papers
pruning · growth · Manihot esculenta (cassava)Positive and negative results
7 papers in the same direction as this paper · 6 in the opposite direction
- positive
- no effect
- no effect
10 papers more in this group
See all 14 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.