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: www.四虎com| 艳妇乳肉亭妇荡乳av | caoporn人人 | 亚洲在线视频免费观看 | 一区二区三区www | 精品国产户外野外 | 在线观看国产一区 | 亚洲精品观看 | 欧美自拍视频在线观看 | 91久久精品一区二区三 | 久久加勒比 | 日本a级在线 | 亚洲欧美小视频 | 91亚洲国产成人精品一区二区三 | 日本成人一级片 | 青娱乐欧美 | 91黄免费| 久久婷综合 | 成人在线精品视频 | 99亚洲精品 | 在线看av的网址 | 成人免费精品 | 久久久久久国产精品 | 欧美性猛交xxxx乱大交 | 伊人久久香 | 欧美,日韩,国产精品免费观看 | 自拍偷拍五月天 | 亚洲国产一区在线观看 | 日本乱码视频 | 91网在线| 69免费视频 | 香蕉视频com | 成人免费大片黄在线播放 | 国产一区二区三区中文字幕 | 午夜黄色网| 亚洲色图欧美视频 | 免费观看毛片网站 | 成年人午夜| 国产69久久| 亚洲成人www | 日本久久一区二区 |