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

chinadaily.com.cn
left corner left corner
China Daily Website

Vegetable factory a farming solution

Updated: 2012-08-18 09:40
By Jin Zhu ( China Daily)

Technology helps save arable land, increase food safety and yields

Countries in East Asia, including China, with limited resources, are looking at "plant factories" - a kind of artificial farm that doesn't use arable land - as a way to provide adequate food supplies for rising populations.

Vegetable factory a farming solution

Yang Qichang, a leading agricultural technology scientist at the Chinese Academy of Agricultural Sciences, checks vegetables growing in a plant factory in Beijing. [Photo/China Daily]

Yang Qichang, a leading agricultural technology scientist at the Chinese Academy of Agricultural Sciences, said plant technology that doesn't need soil is expected to help countries like China, Japan, and South Korea achieve their ambitious targets of food self-sufficiency in the coming decades.

Plant factories, which originated in Japan in the 1970s, are considered a successful way to get high yields via control of growing conditions, such as light, temperature and moisture, in a closed space.

Yang, director of the Center for Protected Agriculture and Environmental Engineering at the CAAS, said the advantages of plant factories include their limited demands on the environment and limited need for quality land. Those traits help countries that face shrinking arable land and frequent natural disasters.

Vegetable factory a farming solution

In a 10,000-square-meter plant factory in the CAAS, vegetables such as lettuce, tomatoes, eggplants and cucumbers - common in a Chinese diet - have been planted in a special nutrient solution.

Because they are not grown in soil, the vegetables are beautiful and clean.

"Because there is almost no need for agrochemicals, such as pesticides and fertilizers, the vegetables are attractive to people who are concerned about food safety," Yang said.

He said growing vegetables in plant factories is a physical process, and the seeds are the same as those sowed in the field, so there is no need to worry about food safety.

Yang said vegetables from plant factories now follow the same food safety standards as plants from the field, but generally speaking, they are of higher quality because they contain fewer nitrates and more vitamins.

"In China, scientists have gone about as far as they can go with conventional ways on agricultural production," he said.

For instance, wheat yield is 4.61 metric tons per hectare compared to the world average of 2.76 tons. Per-hectare rice and corn yields are 6.38 tons and 5.28 tons, compared to the global average of 3.38 tons and 3.41 tons, according to the CAAS statistics.

"The room for increasing production seems limited, but not for plants in plant factories," he said.

Such an advantage would certainly help China.

Agriculture experts warn that China may have a difficult time feeding its growing population - expected to peak at about 1.5 billion by 2030 - if natural disasters increase in frequency.

Previous Page 1 2 Next Page

...

...
...
主站蜘蛛池模板: 特级黄色大片 | 中文字幕精品视频在线 | 九九九久久 | 五月婷婷免费视频 | 中国大陆高清aⅴ毛片 | 国产日韩三级 | 狠狠久久久 | 午夜毛片在线观看 | 青青青手机在线视频 | 国产一区二区三区免费看 | 亚洲精品一二三区 | 亚洲精品视频在线播放 | 日韩av在线免费播放 | 99久久婷婷国产综合 | 在线v片 | 四虎永久免费影院 | 国产日韩三级 | 狠狠操综合网 | 超碰人人av | 成年人免费视频观看 | 91成人精品一区在线播放 | 国产成人在线网址 | 久久久久在线视频 | 国产原创自拍 | 亚洲黄色大全 | 青草91| 四虎影院最新网址 | 在线观看欧美 | 在线观看国产精品入口男同 | beeg欧美| 日本一区中文字幕 | 欧美国产激情 | 日韩欧美区 | 91免费网站在线观看 | 香蕉视频链接 | 国产毛片av | 日本一区二区三区精品视频 | 成人国产网站 | 操你啦在线视频 | 国产美女视频一区 | av观看免费 |