Abstract
Onion are the third most important vegetable crop sold in South Africa. Optimum sowing dates for new cultivars was determined in Bloemfontein (South Africa) during 2009 and 2010. Cultivars planted in 2009 and 2010 were ‘Charlize’, ‘Jaquar’, ‘Python’, (South Wester, 2009; Ceres Gold, 2010). Unavailability of ‘South Wester’ seed resulted in replacement with ‘Ceres Gold’. In 2009 onion seeds were sown on 30 April, 7 and 21 May and in 2010 on 11, 25 May and 8 June. Trials were laid out as a randomized complete block design with each treatment combination replicated 3 times. Plant height and leaf number were measured 18 weeks after emergence. At harvest, bulb yield and quality were recorded. Cultivars differed with respect to growth habit, bulb size, neck diameter and bolting, but not bulb fresh mass and yield. Sowing date did not influence plant height and leaf number significantly, except in 2010 where the early sowing dates resulted in taller plants. The respective delayed sowing dates in 2010 (11 May, 25 May, 8 June) significantly decreased average bulb fresh mass (71.48, 49.42, 49.21 g bulb-1) and yield (40.96, 34.05, 28.20 t ha-1). In both seasons thinner necks were recorded for later planting dates. Cultivars tested in Bloemfontein can be sown from late April to late May, although the best results were obtained from sowing in May. Key words: Bolting, bulb diameter, bulb neck diameter, bulb shape, bulb yield, leaf number, photoperiod, plant height, temperature.
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Claims 8
Claim · model-written summary
Cultivars differed in growth habit, bulb size, neck diameter and bolting.
- Taxon
- Onion
Allium cepat0 - Outcome
- growth habit, bulb size, neck diameter and boltinge0
- Direction
- differede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cultivars differed with respect to growth habit, bulb size, neck diameter and bolting”
t0“Onion ( Allium cepa L.)”
Claim · model-written summary
Cultivars did not differ in bulb fresh mass and yield.
- Taxon
- OnionAllium cepat0
- Outcome
- bulb fresh mass and yielde0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but not bulb fresh mass and yield”
e1“Cultivars differed with respect to growth habit”
t0“Onion ( Allium cepa L.)”
Claim · model-written summary
Sowing date did not significantly affect plant height and leaf number overall.
- Taxon
- OnionAllium cepat0
- Treatment
- Sowing datee0
- Outcome
- plant height and leaf numbere0
- Direction
- did not influencee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sowing date did not influence plant height and leaf number significantly”
t0“Onion ( Allium cepa L.)”
Claim · model-written summary
Early sowing dates in 2010 produced taller plants.
- Taxon
- OnionAllium cepat0
- Treatment
- early sowing datese0
- Outcome
- plantse0
- Direction
- tallere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in 2010 where the early sowing dates resulted in taller plants”
t0“Onion ( Allium cepa L.)”
Claim · model-written summary
Delayed 2010 sowing dates significantly decreased bulb fresh mass across 11 May, 25 May and 8 June to 71.48, 49.42 and 49.21 g bulb-1, respectively.
- Taxon
- OnionAllium cepat0
- Treatment
- delayed sowing datese0
- Outcome
- average bulb fresh masse0
- Direction
- decreasede0
- Value
- 71.48, 49.42, 49.21 g bulb-1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“delayed sowing dates in 2010 (11 May, 25 May, 8 June) significantly decreased average bulb fresh mass (71.48, 49.42, 49.21 g bulb-1)”
t0“Onion ( Allium cepa L.)”
Claim · model-written summary
Delayed 2010 sowing dates significantly decreased yield across 11 May, 25 May and 8 June to 40.96, 34.05 and 28.20 t ha-1, respectively.
- Taxon
- OnionAllium cepat0
- Treatment
- delayed sowing datese0
- Outcome
- yielde0
- Direction
- decreasede0
- Value
- 40.96, 34.05, 28.20 t ha-1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“delayed sowing dates in 2010 (11 May, 25 May, 8 June) significantly decreased average bulb fresh mass (71.48, 49.42, 49.21 g bulb-1) and yield (40.96, 34.05, 28.20 t ha-1)”
t0“Onion ( Allium cepa L.)”
Claim · model-written summary
Later planting dates produced thinner necks in both seasons.
- Taxon
- OnionAllium cepat0
- Treatment
- later planting datese0
- Outcome
- neckse0
- Direction
- thinnere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In both seasons thinner necks were recorded for later planting dates”
t0“Onion ( Allium cepa L.)”
Claim · model-written summary
The authors recommend sowing the tested cultivars from late April to late May, favoring May.
- Taxon
- OnionAllium cepat0
- Outcome
- sown from late April to late Maye0
- Setting
- Bloemfonteine0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cultivars tested in Bloemfontein can be sown from late April to late May, although the best results were obtained from sowing in May”
t0“Onion ( Allium cepa L.)”
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See all 27 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.