- Production Manager
- Assistant Professor - Controlled Environments Entomologist
- Technical Development Specialist | Horticulture | France
- Director of Business Development | Middle East | Agtech
- Farm/Production Manager; Berlin (m/w/d)
- Trader Asian Market
- Avocado Growing Manager - Kenya
- Operations Accountant
- Sales Manager for Nordic countries (H/F)
- Senior Breeder
Top 5 -yesterday
- What is the status of tomato brown rugose fruit virus in Europe?
- “Our ToBRFV-resistant variety has been preferred by our producers in wide areas since 2020"
- 2022 Year Overview: 10 stories on greenhouse expansion
- "Greek producers, who also purchase their plants from Spanish nurseries, have reported the same quality issue in strawberry plants as Spanish producers"
- New horticultural lighting technical requirements launched
Top 5 -last week
Top 5 -last month
- Zambia: "We produce 5,000 units of lettuce per week, per tunnel, year-round"
- UK growers stop planting and put nurseries on sale amidst energy crisis and labor shortage
- "You can't grow on water without lights"
- "High-tech farmer AppHarvest is running out of money"
- German family company switches from tomato cultivation to hydroponic lettuce
Hawaii: Ultra fine bubbles help lettuce grower reduce tipburn
Manoa lettuce is a type of mini lettuce that has a uniform, compact, upright shape and is very popular in Hawaii. The manoa lettuce is locally grown in Hawaii. Consumers use manoa lettuce in place of any other lettuce, such as romaine and butter lettuce. Manoa lettuce is popular with the local consumers. The variety is susceptible to tipburn. Tipburn is a big problem as it is reducing the sellable product by 25%.
Tipburn also reduces growth results in a smaller crop. A problem in Hawaii is that the irrigation water is warm 23.9 °C (75 °F). In the morning and in the afternoon temperatures can go up to 26 °C (79 °F). Mari’s Gardens goal was to improve the production quality by growing larger, sturdier crops and eliminating tipburn.
Ultrafine bubble benefits
Maris Garden opted for an agriGaLF. They installed the agriGaLF onto a 2.6 m3 (700 gallon) nutrient feed tank. The nutrient feed tank connects to a hydroponic rafts gutter system of 15,000 heads of lettuce. The nutrient feed water recirculates all the time in this closed loop system.
Maris Garden started the trial recipe running the ultrafine bubble generator in intervals of 2 minutes on and 20 minutes off. The result was an increase of DO levels from 6.5 to 7.8 mg/liter. Higher DO levels reduced the amount of tipburn problems. After 2 weeks they increased the operation time from 2 minute to 10 minute intervals. Now the DO levels were up to 8.43 mg/liter.
Upon achieving these DO levels, the tipburn problems disappeared. Increasing their sellable product immediately by 25%. On top of that Mari's Gardens was able to grow lettuce with a higher EC which resulted in a firmer crop. In consideration of these results, the agriGaLF can be a lucrative solution for many greenhouse operations. Especially those with warm irrigation water and low DO levels.
"I am proud to grow organic vegetables, including Manoa lettuce. The agriGaLF improves the quality of our produce greatly", says Fred Lau, owner of Mari's Gardens.
For more information:
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T: +81 70 4422 8292
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Other news in this sector:
- 2022-12-02 Linköping will grow more climate-smart tomatoes
- 2022-12-02 Canada: New growing containers will bring the green to Nipissing
- 2022-12-02 "Greek producers, who also purchase their plants from Spanish nurseries, have reported the same quality issue in strawberry plants as Spanish producers"
- 2022-12-02 Growth of specialty crops highlights need for expanded risk management tools
- 2022-12-01 BASF’s vegetable seeds and IUNU partner to advance digital phenotyping for hydroponic lettuce
- 2022-12-01 Germany: Vanilla, pepper, and vegetables cultivated in new research center
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