日批在线视频_内射毛片内射国产夫妻_亚洲三级小视频_在线观看亚洲大片短视频_女性向h片资源在线观看_亚洲最大网

Make me your Homepage
left corner left corner
China Daily Website

Scientists cultivate high-yield salt-resistant rice

Updated: 2013-12-31 17:00
( Xinhua)

HAIKOU - Chinese scientists have cultivated a high-yield salt-resistant rice variety that boasts an output of six tons per hectare.

In an experimental program, two professors from Hainan University and additional researchers from the Hunan Provincial Academy of Agricultural Sciences planted 18 salt-resistant varieties on 3 mu (0.2 hectares) of saline-alkali land along the sea coast in Yancheng city, East China's?Jiangsu province this year.

After harvesting in October, one variety has proved to have similar output as varieties growing on normal farmland, said Lin Qifeng, one of the professors from Hainan University.

The progress marks a big breakthrough in the application stage as the varieties were planted in real saline-alkali soils rather than in labs, Lin said.

The professor said they will expand the experimental plantation to 100 mu in Yancheng in 2014 to further evaluate the performance of the salt-resistant varieties.

Yancheng currently has 410,000 hectares of coastal marsh, but saline-alkali land is expanding by 2,000 hectares per year.

If it proves successful in further tests and is approved by agricultural authorities, the high-yield salt-resistant variety could mean enormous economic benefits by helping the world's most populous nation cultivate its vast idle saline-alkali land, he said.

Cultivation, together with the use of rice straw and other organic fertilizers, could help improve soil conditions in the long term, said Li Guanyi, another professor with Hainan University.

China has some 13.3 million hectares of saline-alkali soils with the potential to be cultivated, equivalent to one tenth of the country's total farmland, according to data from the Chinese Academy of Sciences.

Wang Cailin, chief scientist of the rice breeding program in Jiangsu, said more than one quarter of the world's land is saline-alkali soil and another 20 percent of farmland is at risk of salination.

Traditional methods of desalination, such as soil replacement and watering down the salt, are less efficient and also costly, while the research progress on salt-resistant plants points to promising new prospects.

The professors inserted a salt-resistant gene from a wild plant into a normal rice variety six years ago. After five years of screening, they have obtained 18 salt-resistant rice varieties.

The two began to dedicate themselves to research on the development of salt-resistant varieties as early as 1992. They managed to cultivate salt-resistant vegetables, including tomatoes, eggplant, cowpeas and pepper, years later in the late 1990s.

Scientists in other countries, including the United States, have also developed salt-resistant varieties such as barley, wheat, sorghum and tomatoes. However, most saline-alkali soil exploitation worldwide focuses on landscape greening rather than the cultivation of crops and vegetables.

 
 
...
主站蜘蛛池模板: 天天天天天天天天操 | 久久精品三级 | 午夜国产视频 | 色婷婷一区二区 | 亚洲日日日 | 久久黄色视屏 | 四虎国产在线 | 91免费精品视频 | 久久久久久久久福利 | 国产日韩精品视频 | 麻豆av免费看 | 久久五月婷| 亚洲欧美国产精品 | 狠狠干2018| 国内精品久久久久久久 | 午夜毛片在线 | 黄色一级大片免费看 | 久久香蕉精品 | 国产欧美日韩成人 | 日韩免费久久 | 九九在线视频 | 久久精品在线 | 日韩一区在线视频 | 欧美亚洲精品在线 | 亚洲黄网在线观看 | 免费高清成人 | 91日韩 | 日韩91在线 | 永久免费在线视频 | 操欧美老女人 | 人人看超碰 | 国产亚洲不卡 | 黄色一级a毛片 | 国产精品久久久久免费 | 国产精品1234区| 欧美一级特黄aaaaaa | 日韩欧美中文字幕在线视频 | 不卡国产视频 | 国产丝袜在线播放 | 91精品免费视频 | 可以免费在线观看的av |