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LEGAZPI
CITY—The International Crops Research Institute for
Semi-Arid Tropics (Icrisat) has developed the “smart
biofuel crops” that are now being used and promoted to
ensure energy and environmental security amid the raging
global debate on whether the biofuel revolution is
causing imbalances in food security and produces
greenhouse gases.
Smart
biofuel crops are those that ensure food security,
contribute to energy security, provide environmental
sustainability, tolerate the impacts of climate change
on shortage of water and high temperatures and increase
livelihood options, Dr. William Dar, director general of
Icrisat, said in a statement reaching media
organizations here.
“The
time has come to ensure that only smart biofuel crops
are developed and utilized so that they can link the
poor farmers of the drylands to the biofuel market,
without compromising on their food security or causing
environmental damage,” Dar said.
Through
its BioPower Strategy, Icrisat is developing and
promoting sweet sorghum as a major feedstock for
bioethanol. Sweet sorghum is a carbon dioxide-neutral
crop, which is a big contributory factor to being called
a smart crop.
Icrisat-bred
sweet sorghum varieties and hybrids have increased sugar
content in the juice in their stalks. Icrisat’s rainy
season varieties give 42-percent higher sugar yield, and
rainy season hybrids give a 20-percent increased sugar
yield.
Sweet
sorghum (otherwise known as sweet corn) has a strong
propoor advantage since it has a triple product
potential grain, juice for ethanol, and bagasse (crushed
stalk waste) for livestock feed and power generation.
Its
highlight is that there is no compromise on farmers’
food security, since the grain is available for the
farmers, along with the sugar-rich juice from the stalk
that can be distilled to ethanol.
There
are other benefits also. It is a cost-effective and
competitive feedstock. It has a shorter crop cycle of
four months compared with the 12 months of sugar cane.
“It has
a water requirement of 4,000 cubic meter to produce a
kiloliter of bioethanol, compared with 36,000 cu.m
required for sugar cane,” according to Dar.
Putting
all the factors together, the feedstock cost to produce
one kiloliter of ethanol from sweet sorghum is $81.6,
whereas it is $111.5 for sugar cane, and $89.2 for
maize.
Sweet
sorghum is tolerant to water scarcity and high
temperatures, two qualities which will keep the crop in
good stead when the climate changes with global warming.
It also
has high water-use efficiency. While sorghum requires
310 kilogram (kg) of water per kilogram of dry matter,
maize requires 370 kg of water per kg of dry matter.
Sweet
sorghum is a carbon dioxide-neutral crop that makes it
environment friendly, and does not add to greenhouse-
gas emissions. During its growth cycle, a hectare of
sweet sorghum cultivation absorbs and emits 45 tons of
carbon. |