Abstract
For the purpose of improving bean sprouts production, the effects of intermittent, short time CO2 treatment on the growth and quality of the bean sprouts of soybean, mung bean and adzuki bean examined. Three kinds of mixed gases containing 600, 800 and 1200ppm of CO2 were prepared. CO2 treatment was performed by introducing the mixed gases into the sprouting bed for 60 minutes a day for consecutive 7 days, beginning 12 hours after the start of cultivation. The CO2 treatment greatly affected the growth and quality of bean sprouts; the CO2 treatment at 600 and 800ppm markedly stimulated the elongation and thickening of hypocotyls, thus enabling the production of socalled "futomoyashi" or high quality thick bean sprouts with gloss, semi-transparency, and substanti- ality. Also the treatment greatly elevated the vitamin C content in the bean sprouts, remarkably improving the marketability of the bean sprouts together with the favorable effects described above. It was assumed that the most appropriate harvesting time for the bean sprouts treated with 600 and 800ppm of CO2 was about 3 days after planting, when the length and thickness of bean sprouts fulfilled the marketability standard, the vitamin C content was greatly elevated, and both the hardening of hypocotyls and the development of lateral roots were moderate. Consequently, the cultivation period was shortened by 3-4 days compared to the conventional method. On the whole, it was concluded that 600ppm was the optimum CO2 concentration in treating bean sprouts, although no significant differences in effectiveness were observed between 600 and 800ppm. In the conventional method of culture, unfavorable levels of CO2 may accumulate over long periods, giving a harmful effect. It may be helpful to improve the method of culture by aerating the chamber and adding CO2 for a short period each day.
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Claims 9
Claim · model-written summary
CO2 at 600ppm stimulated hypocotyl elongation and thickening.
- Taxon
- beant0
- Organ / stage
- hypocotylse0
- Treatment
- CO2 treatment at 600e0
- Outcome
- elongation and thickening of hypocotylse0
- Direction
- stimulatede0
Not reportedComparator
Verbatim
t0“Improvement of bean sprouts production”
e0“the CO2 treatment at 600 and 800ppm markedly stimulated the elongation and thickening of hypocotyls”
Claim · model-written summary
CO2 at 800ppm stimulated hypocotyl elongation and thickening.
- Taxon
- beant0
- Organ / stage
- hypocotylse0
- Treatment
- 800ppme0
- Outcome
- elongation and thickening of hypocotylse0
- Direction
- stimulatede0
Not reportedComparator
Verbatim
t0“Improvement of bean sprouts production”
e0“the CO2 treatment at 600 and 800ppm markedly stimulated the elongation and thickening of hypocotyls”
Claim · model-written summary
CO2 treatment elevated vitamin C content in bean sprouts.
Not reportedComparator
Verbatim
e0“the treatment greatly elevated the vitamin C content in the bean sprouts”
Claim · model-written summary
The treatment improved bean sprout marketability.
Not reportedTreatmentComparator
Verbatim
e0“remarkably improving the marketability of the bean sprouts”
Claim · model-written summary
The proposed harvest time for sprouts treated with 600 or 800ppm CO2 was about three days after planting.
Verbatim
e0“the most appropriate harvesting time for the bean sprouts treated with 600 and 800ppm of CO2 was about 3 days after planting”
Claim · model-written summary
The cultivation period was shortened by 3-4 days versus conventional culture.
- Taxon
- beant0
- Outcome
- cultivation periode0
- Direction
- shortenede0
- Value
- 3-4 dayse0
- Comparator
- conventional methode0
Not reportedTreatment
Verbatim
t0“Improvement of bean sprouts production”
e0“the cultivation period was shortened by 3-4 days compared to the conventional method”
Claim · model-written summary
The authors considered 600ppm the optimum CO2 concentration.
Verbatim
e0“it was concluded that 600ppm was the optimum CO2 concentration in treating bean sprouts”
Claim · model-written summary
Effectiveness did not differ significantly between 600 and 800ppm CO2.
Verbatim
t0“Improvement of bean sprouts production”
e0“no significant differences in effectiveness were observed between 600 and 800ppm”
Claim · model-written summary
The authors suggested aerating the chamber and adding CO2 briefly each day.
Verbatim
t0“Improvement of bean sprouts production”
e0“It may be helpful to improve the method of culture by aerating the chamber and adding CO2 for a short period each day”
The same questions in other papers
co2 · growth · Phaseolus vulgaris (common bean)Positive and negative results
15 papers in the same direction as this paper · 5 in the opposite direction · 1 reporting no difference from an alternative
- negative
- no effect
- no effect
18 papers more in this group
See all 22 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.