Abstract
Plant population and arrangement should be properly designed to maximize the seed yield of short-height genotypes of castor (Ricinus communis L.) in each cropping season. Experiments were performed in the in the fall-winter cropping season of 2008 and 2009 in Botucatu, State of São Paulo, Brazil, to evaluate the effects of row spacing (0.45, 0.60, 0.75, and 0.90 m) and plant population (25,000, 40,000, 55,000, and 70,000 plants ha-1) on agronomical traits, yield components, seed yield, and oil yield of the genotype FCA-PB. A high plant density caused a reduction in plant survival and increased the first raceme insertion height, particularly in the year with the higher rainfall. The basal stem diameter, number of racemes per plant, and seeds per raceme were reduced by increasing the plant density. However, the seed and oil yields were minimally influenced by plant population density and row spacing because the castor plant compensated for a low plant population with a high number of racemes and seeds. The maximum seed yield was achieved with an estimated 0.64 m of row spacing and 50,107 plants ha-1 (i.e., 3.2 plants m-1).
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Claims 7
Claim · model-written summary
High density reduced castor plant survival.
- Taxon
- castor
Ricinus communist0 - Material
- FCA-PBe1
- Treatment
- high plant densitye0
- Outcome
- plant survivale0
- Direction
- reductione0
- Qualifier
- particularly in the year with the higher rainfalle0
- Setting
- Botucatu, State of São Paulo, Brazile2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A high plant density caused a reduction in plant survival and increased the first raceme insertion height, particularly in the year with the higher rainfall”
t0“castor”
e1“genotype FCA-PB”
e2“Botucatu, State of São Paulo, Brazil”
Claim · model-written summary
High density increased first raceme insertion height.
- Taxon
- castorRicinus communist0
- Treatment
- high plant densitye0
- Outcome
- first raceme insertion heighte0
- Direction
- increasede0
- Qualifier
- particularly in the year with the higher rainfalle0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A high plant density caused a reduction in plant survival and increased the first raceme insertion height, particularly in the year with the higher rainfall”
t0“castor”
Claim · model-written summary
Increasing density reduced basal stem diameter, racemes per plant, and seeds per raceme.
- Taxon
- castorRicinus communist0
- Treatment
- increasing the plant densitye0
- Outcome
- basal stem diameter, number of racemes per plant, and seeds per racemee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The basal stem diameter, number of racemes per plant, and seeds per raceme were reduced by increasing the plant density”
t0“castor”
Claim · model-written summary
Population density and spacing minimally influenced castor seed yield.
- Taxon
- castorRicinus communist0
- Treatment
- plant population density and row spacinge0
- Outcome
- seede0
- Direction
- minimally influencede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the seed and oil yields were minimally influenced by plant population density and row spacing”
t0“castor”
Claim · model-written summary
Population density and spacing minimally influenced castor oil yield.
- Taxon
- castorRicinus communist0
- Treatment
- plant population density and row spacinge0
- Outcome
- oil yieldse0
- Direction
- minimally influencede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the seed and oil yields were minimally influenced by plant population density and row spacing”
t0“castor”
Claim · model-written summary
Castor compensated for low population through more racemes and seeds.
- Taxon
- castorRicinus communise0
- Outcome
- compensated for a low plant populatione0
- Qualifier
- high number of racemes and seedse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the castor plant compensated for a low plant population with a high number of racemes and seeds”
Claim · model-written summary
Estimated maximum castor seed yield occurred at 0.64 m spacing and 50,107 plants ha-1.
- Taxon
- castorRicinus communist0
- Outcome
- maximum seed yielde0
- Direction
- maximume0
- Value
- 0.64 me0
- Qualifier
- 50,107 plants ha-1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The maximum seed yield was achieved with an estimated 0.64 m of row spacing and 50,107 plants ha-1 (i.e., 3.2 plants m-1)”
t0“castor”
The same questions in other papers
density · yield · Ricinus communis (castor bean)Positive and negative results
1 paper in the same direction as this paper · 18 in the opposite direction
- positive
- positive
- positive
16 papers more in this group
See all 20 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.