Israeli crop technology company Roots Sustainable Agricultural Technologies Ltd says that trails of its proprietary Root Zone Temperature Optimization (RZTO) system have demonstrated the benefits of optimal root temperature on Romaine lettuce.
Trials conducted in Israel this summers showed a 132 per cent increase in lettuce leaf fresh weight, while the crop’s growing cycle was reduced by almost half, with the crop ready for harvesting in 27 days. The company said that the trial followed successful RZTO cooling proof of concepts on lettuce using Nutrient Film Technique (NFT) technologies and interim results in medicinal cannabis.
Using a hybrid ground source heat exchange version of the RZTO system, lettuce roots were cooled to remain relatively stable around 24 degrees centigrade, despite air temperatures in the greenhouse regularly topping 34 degrees. In comparison, root temperature of control plantings fluctuated between 28 and 34 degrees.
Company CEO Dr Sharon Devir said that the results highlighted the many benefits of root zone cooling; “Cooling the roots of lettuce plants in summer not only significantly increases crop yield but also reduces the growing cycle duration and increase yield uniformity. These benefits together could help farmers plan for increased annual crop production and, therefore, increased income. Our RZTO systems are versatile and can be used to cool the roots of crops in open fields, grow bags, hydroponic and in soil.”
Photo Caption: The trial increased harvested fresh weight of Romaine lettuce.
Photo Credit: pxhere
The post Cooling lettuce roots boosts crop growth appeared first on Hort News on 26 September 2018.
New research from Michigan State University in the United States suggests that crop yields and the global food supply chain can be preserved, despite the prospects of climate change, by harnessing soil.
The researchers found that carbon dioxide compensated for yield losses caused by climate change, as it acted as a natural fertiliser to help crops grow. However, when soil organic carbon losses were included in the analysis, the increased carbon dioxide in the atmosphere was not sufficient to prevent yield losses.
“Through agronomic management, which is ‘doing the right thing at the right time for your crops,’ soil quality and health can be improved,” said lead researcher MSU Foundation Professor Bruno Basso. “Up until now, research hasn’t accounted for what soil gives back to the cycle of climate change, and it is arguably the most critical resource to adapt to mitigate its effects. Ultimately, soil is the ‘home’ of the plants. If we aren’t caring for the soil, plants and crops are unsheltered and left to deal with climate change on their own.”
He also explained that farmers can practice better agronomic management to protect soil against the effects of climate change. This should include the use of cover crops, conservation tillage, adding organic carbon to soil or by increasing yields through advanced genetics and agronomy.
Photo Caption: Research says that looking after soils can mitigate the negative effects of climate change on crop growth.
Photo Credit: Pixnio
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