Assumptional science ought to be the heading here, where the story is based on this assumption, that and the other assumption, without any credible attempt to show proof of the assumption. Yep that’s how science is reported and done the CSIRO way nowadays.
Written by Kerry Faulkner
MAPPING the response of wheat root systems is part of research aimed at avoiding the global food crisis experts predict will occur by 2050 as crops fail under the strain of future climates with less water, warmer temperatures and increased carbon dioxide.
CSIRO principal research scientist Dr Jairo Palta recently completed the collaborative investigation into the impact of such climates on the root system of wheat.
It concluded elevated carbon dioxide on its own enhanced root and shoot biomass but the positive effect was reduced when plants were grown under both elevated carbon dioxide and temperatures three degrees above current ambient temperature.
The findings of the three-year study High temperature reduces the positive effect of elevated CO2 on wheat root system growth have been published in Elsevier’s Field Crops Research.
The study says that by 2050 Australia carbon dioxide in the atmosphere will be 550 parts per million (up from 384) but in reality is likely to be much higher and temperatures could be up to three degrees warmer.
Dr Palta says increasingly research is looking to find new types of wheat and other crop that can adapt to those conditions.
Previous studies have investigated the ‘above ground’ implications of individual environmental factors on wheat but there has been little investigation on the impact below ground on the root system of increased carbon dioxide, warmer temperatures and decreasing rainfall acting simultaneously.
Wheat roots put to the test
His team tested spring wheat genotypes growing them in especially designed tunnel houses in which temperature, carbon dioxide and irrigation were controlled.
Growth and proliferation of the roots was mapped weekly onto transparent film, which was then photographed and the digital images analysed using specialised computer software.
“The root system is very important because it captures water, nitrogen and other nutrients and this effects what happens above ground,” Dr Palta says.
“Climate change is going to have an impact on agricultural production and this is very critical because predictions suggest there is going to be a food crisis by the year 2050.
“This is because there will be less water available, fertile arable land is being developed for housing and used for industrial crops, soils are more hostile through drought, acidity and waterlogging. These are the challenges we have to face.
“We have to increase crop production to be able to face that food crisis which climate change is going to make worse.
“CSIRO and many other organisations are investigating solutions for those challenges.”
Sure, that’s translated into “more funding needed”.
The whole article is predicated on ‘ifs, buts, maybes, and ‘suggested’ predictions of failed models. Of course, this research is the complete opposite of Chinese Research, which is not bound by CSIRO rules of inclusion of climate change propaganda as published by the CSIRO:
Future Winter Wheat Yields on the North China Plain: Are they apt to be enhanced, degraded or little affected by predicted climate change?
The money quote: “Yang et al. report that a 310-ppm increase in the air’s CO2 concentration “would increase the winter wheat yield by 24.8 and 43.1% in irrigated and rain-fed fields, respectively,” while “the interacting effects of elevated CO2, temperature and precipitation produced average yield increases of 23.1% with the irrigated treatment and 27.7% with the rain-fed treatment.””
WOW! Of course the CSIRO scientists are not permitted to read ‘contrary’ science, for fear of dismissal. More in their (CO2 Science) editorial:
The Role of Atmospheric CO2 Enrichment in Human Nutrition: Is it positive or negative? […]
All things considered, therefore, it would appear that the ongoing rise in the air’s CO2 content will enable mankind to produce much greater amounts of only slightly less nutritious food. And who of us is there that would rebel against eating just a couple more mouthfuls of the agricultural largesse provided by a truly CO2–enriched atmosphere?
Sherwood, Keith and Craig Idso
UPDATE: Dr Matt Ridley shows that even the IPCC don’t see that kind of warming by 2050: “The IPCC commissioned four different models of what might happen to the world economy, society and technology in the 21st century and what each would mean for the climate, given a certain assumption about the atmosphere’s “sensitivity” to carbon dioxide. Three of the models show a moderate, slow and mild warming, the hottest of which leaves the planet just 2 degrees Centigrade warmer than today in 2081-2100. The coolest comes out just 0.8 degrees warmer.”