Abstract
The cultivation period of cassava in Kagoshima, Japan, which belongs to the temperate zone, is limited by the low temperature in winter. To maximize productivity under this limited period, investigations were conducted on the gas exchange rate and production structure relating to light utilization in a plant community of cassava grown under different nitrogen fertilization conditions. Fertilization either at planting or three months after planting significantly increased stomatal conductance in the upper canopy and root dry weight compared to the control. In addition, the dry matter distribution to stem and root dry matter rate of initial fertilization treatment were significantly higher, and the dry matter distribution to root of the latter fertilization treatment tended to be higher than that of the control. However, light transmittance at 80 cm below the top of the canopy was almost the same as that at the ground surface, which was a common tendency among the treatments. In conclusion, it was revealed that the effects of fertilization on yield were mainly the increase in the gas exchange rate of individual leaves and the change of dry matter distribution rather than an improvement in light transmittance.
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Claims 6
Claim · model-written summary
Fertilization at planting increased upper-canopy stomatal conductance and root dry weight relative to control.
- Taxon
- Cassava
Manihot esculentat0 - Treatment
- Fertilization either at plantinge0
- Outcome
- stomatal conductance in the upper canopy and root dry weighte0
- Direction
- increasede0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fertilization either at planting or three months after planting significantly increased stomatal conductance in the upper canopy and root dry weight compared to the control.”
t0“Cassava”
Claim · model-written summary
Fertilization three months after planting increased upper-canopy stomatal conductance and root dry weight relative to control.
- Taxon
- CassavaManihot esculentat0
- Treatment
- three months after plantinge0
- Outcome
- stomatal conductance in the upper canopy and root dry weighte0
- Direction
- increasede0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fertilization either at planting or three months after planting significantly increased stomatal conductance in the upper canopy and root dry weight compared to the control.”
t0“Cassava”
Claim · model-written summary
Initial fertilization significantly increased dry matter distribution to stem and root dry matter rate.
- Taxon
- CassavaManihot esculentat0
- Treatment
- initial fertilization treatmente0
- Outcome
- dry matter distribution to stem and root dry matter ratee0
- Direction
- highere0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the dry matter distribution to stem and root dry matter rate of initial fertilization treatment were significantly higher, and the dry matter distribution to root of the latter fertilization treatment tended to be higher than that of the control”
t0“Cassava”
Claim · model-written summary
Later fertilization tended to increase dry matter distribution to root relative to control.
- Taxon
- CassavaManihot esculentat0
- Treatment
- latter fertilization treatmente0
- Outcome
- dry matter distribution to roote0
- Direction
- highere0
- Qualifier
- tended to bee0
- Comparator
- the controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the dry matter distribution to root of the latter fertilization treatment tended to be higher than that of the control”
t0“Cassava”
Claim · model-written summary
Light transmittance 80 cm below canopy top was nearly the same as at ground surface across treatments.
- Taxon
- CassavaManihot esculentat0
- Outcome
- light transmittancee0
- Direction
- almost the samee0
- Qualifier
- among the treatmentse0
- Comparator
- the ground surfacee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“light transmittance at 80 cm below the top of the canopy was almost the same as that at the ground surface, which was a common tendency among the treatments”
t0“Cassava”
Claim · model-written summary
Authors attributed the fertilization effect on yield mainly to increased leaf gas exchange and changed dry matter distribution.
- Taxon
- CassavaManihot esculentat0
- Treatment
- fertilizatione0
- Outcome
- yielde0
- Qualifier
- increase in the gas exchange rate of individual leaves and the change of dry matter distributione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effects of fertilization on yield were mainly the increase in the gas exchange rate of individual leaves and the change of dry matter distribution rather than an improvement in light transmittance”
t0“Cassava”
The same questions in other papers
fertilization · growth · Manihot esculenta (cassava)Positive and negative results
64 papers in the same direction as this paper · 6 in the opposite direction
- no effect
- no effect
- no effect
67 papers more in this group
See all 71 papers →fertilization · physiology: gas exchange · Manihot esculenta (cassava)Results agree
1 paper in the same direction as this paper
- positive
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.