国产热热热精品,亚洲视频久久】日韩,三级婷婷在线久久,99人妻精品视频,精品九热人人肉肉在线,AV东京热一区二区,91po在线视频观看,久久激情宗合,青青草黄色手机视频

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

...

...
...
江门市| 天柱县| 府谷县| 杂多县| 阿坝| 潞西市| 西充县| 遂溪县| 沂源县| 乌兰察布市| 五指山市| 广东省| 桦川县| 温宿县| 延川县| 招远市| 吉木萨尔县| 尼玛县| 浮梁县| 拉萨市| 衡东县| 手游| 德阳市| 建昌县| 台山市| 平定县| 长葛市| 兴海县| 丹阳市| 兴文县| 方山县| 从化市| 府谷县| 宝清县| 南乐县| 易门县| 安平县| 上虞市| 来凤县| 阿坝县| 广河县|