欧美精品在线第一页,久久av影院,午夜视频在线播放一三,久久91精品久久久久久秒播,成人一区三区,久久综合狠狠综合久久狠狠色综合,成人av一区二区亚洲精,欧美a级在线观看

China Focus: Chinese scientists promote hornless yaks to herding areas

Source: Xinhua| 2019-07-29 18:43:04|Editor: Xiang Bo
Video PlayerClose

XINING, July 29 (Xinhua) -- Chinese scientists are promoting a freshly developed breed of yak to herders in the country's northwest.

Ashidan yaks have been cultivated by Yan Ping and her team from the Lanzhou Institute of Husbandry and Pharmaceutical Sciences, a branch of the Chinese Academy of Agricultural Sciences, after 20 years' research.

Unlike other yaks who have hostile tempers and horns, these shy creatures have the same fluffy heads but no horns to bear.

Yaks provide for the living of herdsmen in China's Qinghai-Tibet Plateau, but these animals are mostly born wild and they are easily affected by natural conditions.

"Yaks may lose a quarter of their weight through the winter, and some may die of atrocious weather, bringing great loss to herdsmen," Yan said.

Naturally, about 6 percent or 7 percent of yaks in Qinghai have no horns and these were selected for the breeding program. Together with Datong Yak Breeding Farm in northwest China's Qinghai Province, Yan's team selected local yaks born without horns and used molecular breeding technology to cultivate new yak varieties.

"The newly bred variety has a mild temperament and they are more accustomed to staying indoors," said Li Guoqing, a worker who has raised yaks for more than 30 years on the farm.

"Without horns, yaks are less likely to get injured and thus can grow stronger," said Sangye, a herdsman in Quanji Township, Gangcha County in Haibei Tibetan Autonomous Prefecture.

According to the team, the average reproduction survival rate of the Ashidan yaks is 59.98 percent, 11.72 percentage points higher than local yaks, and its mortality rate is 1.24 percent, 4.32 percentage points lower.

So far, the Ashidan yaks have been introduced to pastoral areas in China's Qinghai, Gansu and Sichuan provinces to help local herdsmen alleviate poverty. Researchers said they hope to promote the new breed to all yak-raising areas including Tibet Autonomous Region.

"The future is promising. Currently, the number of the Ashidan yaks cannot meet the demand of the market," said Yan.

The research team is improving their breeding technology to raise the efficiency of propagation.

TOP STORIES
EDITOR’S CHOICE
MOST VIEWED
EXPLORE XINHUANET
010020070750000000000000011100001382674941
主站蜘蛛池模板: 国产精品精品国内自产拍下载| 99国产精品免费观看视频re| 欧美黄色片一区二区| 久久精视频| 国产在线播放一区二区 | 国产精品日韩一区二区三区| 久久夜色精品亚洲噜噜国产mv| 午夜看片网| 国产人伦精品一区二区三区| 日韩午夜毛片| 国产videosfree性另类| 亚洲一区2区三区| 欧美一级久久精品| 日韩av视屏在线观看| 欧美高清性xxxx| 少妇中文字幕乱码亚洲影视| 国产一区在线免费| 国产精欧美一区二区三区久久| 色婷婷久久一区二区三区麻豆 | 国产精品午夜一区二区三区视频| 日韩精品一区二区三区不卡| 一区二区三区毛片| 亚洲精品久久久久中文第一暮| 91麻豆精品国产91久久| 欧美日韩久久一区二区| 国产经典一区二区三区| 久久久精品欧美一区二区免费| 久久久精品欧美一区二区| 国产91视频一区| 久久精品国产色蜜蜜麻豆| 国产一区二区伦理片| 99久久国产综合精品女不卡| 91精品一区二区中文字幕| 中文字幕日韩有码| 欧美一区视频观看| 狠狠色很很在鲁视频| 最新国产精品自拍| 欧美日韩一区二区三区四区五区六区| 欧美综合在线一区| 99日本精品| 亚洲国产精品一区在线| 国产精品偷伦一区二区| 国产精品综合在线观看| 99国产精品永久免费视频| 国产欧美一区二区三区在线| 欧美日韩久久一区| 欧美高清极品videossex| 国产毛片精品一区二区| 私人影院av| 国产精品久久久区三区天天噜| 蜜臀久久久久久999| 欧美精品xxxxx| 亚洲欧美国产一区二区三区| 日韩欧美多p乱免费视频| free×性护士vidos欧美| 2021天天干夜夜爽| 午夜国内精品a一区二区桃色| 大bbw大bbw巨大bbb| 中文字幕日韩精品在线| 国产一级不卡毛片| 国产日韩欧美一区二区在线观看| 精品国精品国产自在久不卡| 一区二区三区免费高清视频| 欧美日韩国产专区| 激情久久精品| 国产日韩欧美另类| 国产一区二区极品| 久久久久国产精品一区二区三区| 精品三级一区二区| 一级久久精品| 国产午夜亚洲精品| 中文字幕日韩有码| 91看片免费| 国产馆一区二区| 午夜影院啪啪| 日韩精品一区二区三区免费观看| 亚洲欧美一区二| 国产精品第157页| 亚洲一区中文字幕| 99国产伦精品一区二区三区| 久久一区二区视频| 亚洲高清久久久|