Following the UK’s research field trial of a biostimulant, analysis of the data resource has revealed significantly increased yield for crops that had been under prolonged or extreme heat stress. The results indicate that Quantis can have an important role in potato agronomy programs from tuber initiation, through the crop bulking phase.
According to Syngenta head of technical, Dave King, Quantis delivers a readily available blend of organic carbon, amino acids, potassium and calcium that supplement the plant’s own molecular cell function. “Acting directly as an anti-oxidant it can help to counter reactive oxygen species (ROS - free radicals) that can cause significant damage, particularly within the foliage if leaves get too hot,” said King. “It is believed to activate and enhance the potato plant’s natural capability to adapt to heat stress, to prevent damage.”
King explained the strength of Quantis lies in its relatively high proportion of short chain carbon molecules, which are particularly effective at helping the plant to prevent the creation of ROS during periods of stress. Furthermore, it helps with the scavenging of accumulated ROS, to minimize their adverse effects.
“By filling the organic carbon gap when a plant comes under stress it can act to minimize its effects,” he said. Quantis also contains a level of amino acids that can help to protect plant structures from nitrogen and protein degradation when under stress. Furthermore, Quantis also provides osmoprotectant regulators to help plants manage cell osmosis, which could help contribute to the heat stress mitigation.
The highest returns in tuber yields were generated from three applications of Quantis at 2.0 l/ha, applied at the onset of tuber bulking; a second two weeks later; and third at canopy closure. Application trials had shown it was fully compatible for tank mixing with all the blight fungicides tested.
Reporting results of Quantis trials last season, King outlined that of the 32 sites experiencing conditions of greater than 25 degrees Celsius for more than four hours through the application window, yields were an average 2.2 t/ha greater. The 14 sites that experienced a heat event in excess of 30 degrees Celsius over that period recorded an average 1.9 t/ha yield increase.
Continued Syngenta field research in 2021 will look at refining application timings, noted King. More controlled trials will also seek to tease out differences between varieties and other variables, such as irrigation and crop duration.