- 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
Biochar suitable substrate for soilless hydroponic tomatoes
Wargent and colleagues Samuel Dunlop, Marta Camps Arbestain, and Peter Bishop performed experiments in which they compared the performance of tomato crop green-waste biochar as a soilless substrate with pine sawdust for hydroponic tomato production. They also evaluated mixtures of biochar and sawdust at different ratios.
The scientists used tomato crop green waste consisting primarily of vines and also the stem clips and string used to train tomato vines during the production cycle. This non-plant waste accounted for about 7.5% of the waste dry weight - the study acknowledges that this level of non-plant waste could be diluted further. Substrates were prepared consisting of biochar, sawdust, or mixtures of the two materials, and then tomato plants were grown in the different substrates for 110 days. After harvesting, the plants were evaluated for substrate physical and chemical properties, along with plant growth, leaf nutrient content, and biomass.
"The properties of biochar produced from tomato crop green waste were generally as would be expected," the authors said. "Tomatoes grown in substrates containing or consisting entirely of biochar did not differ significantly in terms of growth, yield, or fruit quality to those grown in pine sawdust." The researchers said substrates containing or consisting entirely of biochar also exhibited "acceptable" water-holding and aeration characteristics.
"The results of our study support the concept of creating a closed loop system whereby biochar produced from tomato crop green waste is used as a substrate for soilless, hydroponic tomato production," said the scientists.
They added that biochar used as a soilless substrate could have considerable advantages for greenhouse tomato growers. "For example, turning tomato crop green waste to biochar would divert 10-60 t·ha-1 of green waste away from landfill each crop cycle. If the assumption is made that the green-waste biochar is produced at 550 °C, it would meet 13% to 50% of the grower's substrate requirements, on a per-hectare basis."
For more information:
Receive the daily newsletter in your email for free | Click here
Other news in this sector:
- 2022-11-24 Agriculture resource dive: peat
- 2022-11-11 Ireland: Addressing the challenges related to peat supply in horticulture
- 2022-11-01 Why should I shelter my substrate stock from wind and rain?
- 2022-10-21 New £1million RHS research project to accelerate horticulture’s transition to peat-free
- 2022-10-17 "We're well underway to steerable strawberry cultivation"
- 2022-10-13 Ireland: Shiploads of peat being imported for growers
- 2022-09-27 Automation and control are the main focus of the International Propagation Seminar
- 2022-09-23 "Compare it if you like with your 3-D printer for growing media"
- 2022-09-21 Acrotelm and wood fiber as alternative to peat
- 2022-09-21 Using human hair to create hydroponic growing media
- 2022-09-16 How to maintain the proper pH of a growing medium
- 2022-09-14 Peat moss is an emerging option in the global supply chain of substrate raw materials
- 2022-09-06 The power of compost: boosting production with composted biowaste
- 2022-08-30 Response to Defra announcement on the sale of horticultural peat
- 2022-08-29 UK bans peat sales for amateur gardeners
- 2022-08-24 Strawberry grow bags are a ‘robot testing bed’ at Lincoln University
- 2022-08-16 "Double screening technology ensures product quality"
- 2022-08-09 Soils take center stage as experts gather in Glasgow
- 2022-07-20 Growcoon wins innovation award at the Salon du Végétal
- 2022-07-18 “5-10 times faster transplanting of plants”