Abstract
Seed quality of peanut ( Arachis hypogaea L.) is influenced by seed Ca concentration, which is known to be affected by seed size and soil Ca fertility during seed production. Little is known about soil Ca requirements for large‐seeded runner‐type cultivars or for late maturing peanut cultivars that display poor seed quality. This study was conducted to determine if excess Ca fertilization during seed production would improve the laboratory germination and/or seedling emergence of large‐seeded runner‐type peanut cultivars (‘C‐99R’ and ‘AP‐3’) and late‐maturing runner‐types (‘DP‐1’ and C‐99R). Trials were conducted near Marianna, FL, in 2005, 2006, and 2007 using four cultivars and four gypsum treatments (0, 784, 1568, and 2352 kg ha −1 ) to provide excess soil Ca. Pretreatment soil extractable (Mehlich‐1) Ca was 589 kg ha −1 in 2005, 811 kg ha −1 in 2006, and 848 kg ha −1 in 2007, all of which are above the recommended level. The cultivar average seed size (g/100 seeds) ranking was C‐99R > AP‐3 > DP‐1 > ‘Georgia Green’, whereas average seed Ca concentration (mg kg −1 ) ranked Georgia Green > AP‐3 = C‐99R > DP‐1. Cultivar seedling emergence ranking was Georgia Green = AP‐3 > C‐99R > DP‐1 and germination ranked Georgia Green = AP‐3 > C‐99R = DP‐1. These results suggest that the relatively poor emergence of DP‐1 may be, in part, related to its relatively low absorption of seed Ca during seed production. Emergence of C‐99R increased as Ca fertilization increased in 2005, but not in 2006 or 2007. These results suggest that seedling emergence of some large‐seeded cultivars, like C‐99R, may require greater gypsum fertilization if soil Ca levels are marginal during seed production.
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Claims 8
Claim · model-written summary
Average seed size ranked C‐99R above AP‐3, DP‐1 and Georgia Green.
- Taxon
- peanut
Arachis hypogaeat0 - Outcome
- seed sizee0
- Direction
- C‐99R > AP‐3 > DP‐1 > ‘Georgia Green’e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seed size (g/100 seeds) ranking was C‐99R > AP‐3 > DP‐1 > ‘Georgia Green’”
t0“Peanut”
Claim · model-written summary
Seed calcium ranked Georgia Green highest and DP‐1 lowest.
- Taxon
- peanutArachis hypogaeat0
- Outcome
- seed Ca concentratione0
- Direction
- Georgia Green > AP‐3 = C‐99R > DP‐1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seed Ca concentration (mg kg −1 ) ranked Georgia Green > AP‐3 = C‐99R > DP‐1”
t0“Peanut”
Claim · model-written summary
Seedling emergence ranked Georgia Green and AP‐3 above C‐99R and DP‐1.
- Taxon
- peanutArachis hypogaeat0
- Outcome
- seedling emergencee0
- Direction
- Georgia Green = AP‐3 > C‐99R > DP‐1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seedling emergence ranking was Georgia Green = AP‐3 > C‐99R > DP‐1”
t0“Peanut”
Claim · model-written summary
Germination ranked Georgia Green and AP‐3 above C‐99R and DP‐1.
- Taxon
- peanutArachis hypogaeat0
- Outcome
- germinatione0
- Direction
- Georgia Green = AP‐3 > C‐99R = DP‐1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“germination ranked Georgia Green = AP‐3 > C‐99R = DP‐1”
t0“Peanut”
Claim · model-written summary
C‐99R emergence increased with calcium fertilization in 2005.
- Taxon
- peanutArachis hypogaeat0
- Material
- C‐99Re0
- Treatment
- Ca fertilizatione0
- Outcome
- Emergencee0
- Direction
- increasede0
- Qualifier
- 2005e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Emergence of C‐99R increased as Ca fertilization increased in 2005”
t0“Peanut”
Claim · model-written summary
C‐99R emergence did not increase with calcium fertilization in 2006 or 2007.
- Taxon
- peanutArachis hypogaeat0
- Material
- C‐99Re1
- Treatment
- Ca fertilizatione2
- Outcome
- Emergencee3
- Direction
- no_changeinferrede0
- Qualifier
- 2006 or 2007e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but not in 2006 or 2007”
t0“Peanut”
e1“Emergence of C‐99R increased as Ca fertilization increased in 2005”
e2“Emergence of C‐99R increased as Ca fertilization increased in 2005”
e3“Emergence of C‐99R increased as Ca fertilization increased in 2005”
Claim · model-written summary
The authors suggest low seed calcium uptake may partly explain poor DP‐1 emergence.
- Taxon
- peanutArachis hypogaeat0
- Material
- DP‐1e0
- Compound
- seed Cae0
- Outcome
- poor emergencee0
- Qualifier
- in parte0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“poor emergence of DP‐1 may be, in part, related to its relatively low absorption of seed Ca during seed production”
t0“Peanut”
Claim · model-written summary
Greater gypsum fertilization may be needed for large-seeded cultivars when soil calcium is marginal.
- Taxon
- peanutArachis hypogaeat0
- Outcome
- greater gypsum fertilizatione0
- Qualifier
- if soil Ca levels are marginal during seed productione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seedling emergence of some large‐seeded cultivars, like C‐99R, may require greater gypsum fertilization if soil Ca levels are marginal during seed production”
t0“Peanut”
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