久久亚洲国产成人影院-久久亚洲国产的中文-久久亚洲国产高清-久久亚洲国产精品-亚洲图片偷拍自拍-亚洲图色视频

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: 国产毛片久久久久久国产毛片 | 欧美人成在线观看ccc36 | 特黄特级a级黄毛片免费观看多人 | 免费视频网站一级人爱视频 | 在线视频 国产交换 | 三级黄色a| 久操精品视频 | 欧美特黄一级aa毛片 | 中文字幕乱码无线码在线 | 夜晚福利网站 | 国产欧美日韩不卡在线播放在线 | 91在线一区二区三区 | 免费一级毛片在线播放欧美 | 波少野结衣在线播放 | 久久精品国产精品亚洲人人 | 成人午夜做爰视频免费看 | 香蕉国产人午夜视频在线观看 | 精品一区二区三区免费视频 | 大学生久久香蕉国产线观看 | 九九在线观看视频 | 美国亚洲成年毛片 | 亚洲tv成人天堂在线播放 | 亚洲精品国产啊女成拍色拍 | 九九色综合 | 亚洲第一免费网站 | 99久久精品国产9999高清 | 欧美性性性性性色大片免费的 | 色偷偷成人 | 欧美级 | 亚洲国产欧美日韩精品一区二区三区 | 亚洲美女性视频 | 中国a级黄色片 | 成人免费真人毛片视频 | 日本a级在线 | 日本在线看小视频网址 | 欧美日韩另类在线观看视频 | 欧美一二区视频 | 日韩男人的天堂 | 免费人成网站免费看视频 | 日韩精品视频美在线精品视频 | 免费亚洲视频 |