by Xinhua writers: Yu Fei, Hu Zhe, Tan Yuanbin
WUHAN, December 10 (Xinhua) – Homes in Dalad Banner of the autonomous area in Inner Mongolia, north China, have long been sandstone. A gust of wind could believe people to close their eyes. Sand buried large areas of pasture.
In & # 39; s bad desert in & # 39; 80s more than 100 families had to leave their homes in Jiefangtan Town on the edge of the desert in Dalad Banner.
More than a decade ago, scientists came and started each summer a green error in the desert. Gradually changed the landscape. First came a Christmas cover. This grew thicker, and then the sand would continue.
The sand was slowly reclaiming ground, murder, body, grass and animals. The soil was diker, and the vegetation came back.
The hero of this transformation was algal, one of the world's first-ever forms to create more than 3 billion years ago on earth.
Algae can stand temperatures up to 60 degrees, and ultraviolet traffic and drought, said Liu Yongding, a researcher at the Wuhan-based Institute of Hydrobiology of the Chinese Academy of Sciences, who has been studying more than 40 years algae .
The capacity of algae to live in the desert inspired Liu to fortify the drifting sand.
Under natural conditions, it would take more than 10 years for true algae to form a crust.
Liu ordered his team to pick up the best algae types of collectors that were collected over China, and innovative technologists could get a year crush.
Almost 400 million Chinese have been ratified by the overthrow, leaving 27.3 percent of the total land area of China. More than 7.72 million hectares of agriculture have been weakened by wildlife, and 670,000 hectares of agricultural land and 235 hectares of grass are drifting sand or desert.
"We started this research over 20 years ago without financial support, but we stayed there for the potential and needs of the country," said Liu, 74.
"We can not cause all oats to cause oases, such as a service play a role in keeping the earth's warmth alternately. We want to be refuted and restore the soil," he said .
Liu's team has roots of collectors from Hulunbuir, Inner Mongolia, to the Taklimakan island in # 39; the autonomous region of Xinjiang Uygur. They also compared samples of the past six decades. From a small problem of reddish algae, they found more than 700 types of organisms.
Their technical control technology is broadly applied in Inner Mongolia's autonomous area.
In areas where it was applied, the area of rising seawater dropped from 60 percent to 10 percent, and the fortified sand area reached 90 percent. The plant coverage area was less than 15 percent to more than 80 percent.
"It takes 100 years to form a centimeter of fertile soil and form 2,000 years to create 20 centimeters, which should have a lot of generations if a piece of agriculture has been lost." Centimeter thick that plant can grow for a couple of years, said Liu.
Liu believes his technology can be used in wild areas outside China, including countries participating in the initiative of Belt and Wage. His research has drawn scientists from Europe and the United States.
EARTH TO SPACE
Liu has also set his visits on heaven.
Since 1987, its team has used algae to provide long space in space asteroids.
They have experiments performed on six of the recurrent satellites of China, and biological experiments on & # 39; called Shenzhou. They worked with German scholars to study the life support system on the Shenzhou 8 game. They will also carry experiments on the future space station of China.
The study can be returned after the 70s. "We have to find an experiment to find out how many algae can keep a person alive in a closed submarine environment," Liu said.
Wang Gaohong, another researcher at the Institute for Hydrobiology, has generally made significant benefits for building a life-support system. The oxygen generated by higher plants of about 15 square meters is equivalent to that product by just a square meter of algae. It can also provide protein for astronauts.
"On the other hand, in space, at a height of 20 to 100 km, the environment is similar to that of Mars.
Liu has an ambitious goal: leaning old pioneer human migration to Mars.
He first published public use of algae to change the location of Mars as 15 years ago. "We have a common environment in Mars." We can use our knowledge of true algae to transform the environment and help with a human base on a red planet. "
Science fiction writers and scholars set the idea of changing many times over many years ago, but there was no practical way of achieving it. Liu's study made the idea to pay, said Wang.
The intense radiation, low air pressure, dramatic temperature variations and weighty areas on Mars are similar to the earth. Algae are primary producers of the earthquake of # the earth, 30 percent to 40 percent of total totality and play a major role in maintaining biosphere stability, said Wang.
Algae have changed the environment of the earth. Now people are changing the earth, but for the worse.
"As one day we have to leave earth and build another home on another planet, algae can be our pioneer," Wang said.