www射-国产免费一级-欧美福利-亚洲成人福利-成人一区在线观看-亚州成人

Make me your Homepage
left corner left corner
China Daily Website

Scientists make land arable again

Updated: 2013-09-16 01:53
By Cheng Yingqi ( China Daily)

Scientists make land arable again

Since 2003, 20 million drought-enduring plants, including (clockwise from top left) Echinops sphaerocephalus, Poacyngrn hendersonii and Calligonum rubicundum, have been planted along the road. Photos by Hou Yiguo / for Chind Daily


However, in a desert that has annual precipitation of just 10 millimeters, "planting a tree and nurturing it to full growth is even more difficult than raising a child", Xu said.

Xu found seeds and plants that can survive in the bitter salt water under the sand, such as Chinese tamarisk, calligonum and Haloxylon ammodendron.

Since 2003, 20 million drought-enduring plants have been planted along the road, forming a 72-to 78- meter green belt.

The plants are irrigated by underground water pumped up 114 water wells. Compared to the cost of maintaining fences and barriers, irrigating the plants save some 30 million yuan ($4.9 million) every year.

The discoveries and applications of the desert plants is a lengthy process, according to Guan Kaiyun, director of the Turpan Eremophytes Botanic Garden.

"Our researchers working in the stations find the plants and seeds, and we are in charge of plant introduction and acclimatization, which sometimes takes more than a decade to finish," Guan said.

In the parched Turpan Basin sits the world’s only botanic garden of Asian desert flora. When a new plant is found, the samples are usually taken back to the garden, where scientists find ways to help the plants adapt to the new environment.

Spending four decades introducing and preserving desert plants, the botanic garden now has 700 different species, 50 of them endangered. Estimates put the number of plant species in the desert at about 5,000.

The plants also provide scientists with research opportunities.

One example Guan gives is Ammopiptanthus nanus, an endangered evergreen shrub in Xinjiang on which scientists recently extracted a protein that can combat deep cold.

"That protein explains the reason that Ammopiptanthus nanus survives the extreme low temperatures. And it’s worth further study because we might use it in genetically modified techniques in the future," Guan said.

Tian Changyan, deputy director of the Xinjiang Institute of Ecology and Geography, has devoted 10 years to finding the perfect plants that could improve the saline-alkali soil.

"Some plants can only grow in excessively saline soil. If we cultivate these plants on moderately saline soil, the plants will extract the salt out of the soil and improve its fertility," Tian said.

From 305 different salt-tolerant species, Tian identified six that were the most efficient. Experiments on a 67-hectare test field showed the plants were able to reduce the soil salt from 3 percent to less than 0.6 percent within three years.

"Compared to the old method of washing the saline soil with water, the plants are much more effective and sustainable," Tian said.

Scientists at the Xinjiang Institute of Ecology and Geography have devised a major project which could change the landscape forever. By 2020, the institute will build a gene bank of arid regional plants covering 10,000 plant species. Also, a world-class botanical garden is planned for Ili Kazak autonomous prefecture.

"The arid regional plants have excellent genetic features, so the genes are a significant strategic resource of the country," Guan said.

"The genes have great potential for our future development of agriculture, medicine and the military."

Previous Page 1 2 Next Page

8.03K
 
...
...
...
主站蜘蛛池模板: 欧美做爰孕妇群 | www.夜夜骑.com | 色综合a怡红院怡红院首页 色综合精品久久久久久久 色综合九九 | 国产一区二区三区毛片 | 亚洲国产精品一区二区久久 | 亚洲视频一区二区在线观看 | 欧美一级大片在线观看 | 国产特黄一级一片免费 | 国产成人亚洲综合欧美一部 | 国产一区曰韩二区欧美三区 | 国产高清一级视频在线观看 | 亚洲精品久久一区二区无卡 | 日韩精品一区二区三区视频网 | 国产在线成人一区二区 | 中文字幕水野优香在线网在线 | 成年女人午夜免费视频 | 日韩欧美国产高清在线观看 | 韩国一级毛片 | 国产一级一级片 | 看中国一级毛片 | 99亚洲精品 | 泰国一级毛片aaa下面毛多 | 国产精品久久自在自线观看 | 香港三级日本三级人妇三级四 | 精品国产呦系列在线看 | 欧美成人精品大片免费流量 | 男女猛烈无遮掩免费视频 | 91国语精品自产拍在线观看一 | 国产一级一片免费播放视频 | aaa一级| 欧美毛片a级毛片免费观 | 九九视频精品全部免费播放 | 午夜视频在线观看一区 | 精品欧美一区二区在线观看欧美熟 | 日韩免费观看的一级毛片 | 国产亚洲精品一区999 | 欧美视频一区二区专区 | 亚州一级毛片在线 | 亚洲欧美一区二区三区在线 | 久久精品中文字幕一区 | 第一色网站|