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The interaction between salinity & nutrient solution temperatures

A large number of studies on salinity in hydroponic systems have been carried out, but few of them have evaluated the interaction between salinity and nutrient solution temperatures. In Brazil, two experiments were carried out in a randomized block design from January to February (Experiment I) and June to July 2018 (Experiment II).

Experiment I consisted of treatments with five combinations, as follows: unheated (control) and heated nutrient solution (NS) at a temperature of 32°C using fresh water with an electrical conductivity (ECw) of 0.3 dS m−1, and unheated and heated NS at temperatures of 30 and 32°C using brackish water with an ECw of 6.5 dS m−1 in the main plots, with two coriander cultivars (Tabocas and Verdão) in the subplots, which were grown in the same hydroponic channel. The cultivar Verdão was grown in Experiment II in a 2 × 2 factorial arrangement, consisting of two NS temperatures (unheated and heated at 30°C) and two ECw levels (0.3 and 6.5 dS m−1).

“Coriander cultivation is feasible with heated NS despite decreases in shoot fresh matter production compared to the control of approximately 37% for Experiment I (cultivar Verdão at a temperature of 32°C and using fresh water) and 17% for Experiment II (temperature of 30°C and using fresh and brackish waters) at 25 days after transplanting,” the researchers conclude.

Read the complete article here.   /fertilizers-system/

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Cultivation

“The future of indoor and greenhouse vertical farming depends on physics for high quality production”

Affinor Growers has signed a commercialization agreement with Britespan Building Systems to engineer and manufacture new polycarbonate greenhouses co-designed by Affinor and Britespan.

Britespan currently designs, engineers, and manufactures prefabricated buildings in Canada and internationally. Affinor conceived the “Atlantis” greenhouse by adding a polycarbonate material to the outside surface of the Britespan building trusses, dramatically improving certain key performance characteristics of commercial greenhouse systems. The Atlantis Greenhouse optimally accommodates Affinor’s vertical growing technology and processes.

Affinor will be the exclusive worldwide dealer of the Atlantis Greenhouse and Britespan will be the exclusive worldwide supplier of the Atlantis Greenhouse Structure for a term of ten years, with automatic 2-year renewals thereafter.

Affinor and Britespan have also agreed to work together to manufacture the first full-scale demonstration greenhouse to be built adjacent to Affinor’s current lease location on Page Road in Abbotsford.

CEO Nick Brusatore commented: “The future of indoor and greenhouse vertical farming depends largely on physics for high quality production. The Atlantis Greenhouse design accommodates the environmental requirements for automated, vertical farming production, to prepare us for radical climate changes and the various environments we face globally. I expect that the Atlantis Greenhouse will be very competitive and environmentally superior.”

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Cultivation

More than 1.1 million tons of greenhouse vegetables have been harvested in Russia since the beginning of the year

The collection of vegetables and green crops in winter greenhouses in Russia amounted to 1.134 million tons since the beginning of the year, the press service of the Ministry of Agriculture of the Russian Federation reported on November 5.

In the harvested crop, the share of greenhouse cucumbers is 651 thousand tons, and of tomatoes – 458.6 thousand tons. For the same period in 2020, the collection of vegetables in greenhouses amounted to 1.094 million tons, which is 3.6% less than this year.
The most developed production of greenhouse products in Lipetsk, Moscow, Volgograd, Kaluga, Novosibirsk regions, Krasnodar and Stavropol Territories, in the republics of Karachay-Cherkessia, Tatarstan and Bashkiria, they are among the top ten regions-leaders in the industry.
The development of the sub-industry is facilitated by measures of state support, first of all, preferential lending. For farmers who grow vegetables in greenhouses using supplementary lighting technology, there is also an opportunity to receive subsidies within the framework of the state program for the development of agriculture.
For the regions of the Far East, from 2022, compensation is provided for 20% of capital costs for the construction and modernization of greenhouse complexes.
The Ministry of Agriculture expects to maintain positive dynamics at the end of 2021. The forecast for the harvest of greenhouse vegetables is more than 1.4 million tons.
Recall that the cultivation of vegetables in winter greenhouses received a significant impetus for development within the framework of the import substitution program after the introduction of sanctions by Western countries against Russia in 2014 due to the annexation of Crimea.

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Cultivation

In 2023, the second stage of the complex of berry greenhouses will start operating in the Moscow region (RF)

The construction of the second stage of a complex of tunnel greenhouses for the production of berries with an area of ​​90 hectares in the Naro-Fominsk urban district of the Moscow region (RF) will be completed in 2023.

 

This was announced by the Minister of Agriculture and Food of the Moscow Region: “In the Naro-Fominsk urban district of the region, film tunnels with a drip irrigation system have been installed for growing fresh berries in greenhouses. On the site of the first stage with an area of ​​50 hectares this year the first harvest of berries – strawberries, blackberries and raspberries – was harvested. Work is underway on the construction of the second stage of tunnel greenhouses with an area of ​​90 hectares, which is planned to be completed in 2023 ”.

See also: New Year’s Eve without the smell of tangerines – Russia bans the import of tangerines from Turkey during the high season!

At the moment, the site has been fully prepared, it is equipped with roads, communications, a warehouse for storage and utility rooms.

 

Greenfields Agro LLC is implementing an investment project for the placement of tunnel greenhouses for growing berries on 148 hectares of land. The project is planned to be implemented in 3 stages. All crops are planned to be grown in tunnels using a substrate, writes the Ministry of Agriculture of the Russian Federation.

When growing berries, a bio-plant protection system is used, the berries grown in these greenhouses comply with the organic production standard. Completion of all stages of the investment project will allow Greenfields Agro to increase the gross production of berries to 2 thousand tons.

According to the minister, the total investment will amount to 1 billion rubles. The project will create more than 175 permanent and 600 seasonal jobs.

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