亚洲人成网站18禁止中文字幕,国产毛片视频在线看,韩国18禁无码免费网站,国产一级无码视频,偷拍精品视频一区二区三区,国产亚洲成年网址在线观看,国产一区av在线

Home / English Column / Environment / Environment -- Ecological China Tools: Save | Print | E-mail | Most Read
Shanghai Tests Winter Trees
Adjust font size:

Zhou Hanqi from the Shanghai Institute of Botanic Physiology studies cherry trees from Fujian Province yesterday. The city is testing a number of tree species including cherry trees, camellias and maple trees as part of a plan to plant them during the winter in Shanghai. The tests should be completed in 2008.

Shanghai is conducting tests on a number of tree species that bloom over the winter, as part of a plan to add a little color to Shanghai's streets during the coldest months of the year.

Trees that bloom in the winter have been imported from inland parts of China, Europe and North America.

Shanghai Chengtou Landscaping Technology Development Co Ltd is currently testing the trees, and the tests should be completed in 2008, according to Wang Cheng, the project manager.

New trees included cherry trees from Fujian and Yunnan provinces, camellias from Zhejiang Province, Swedish hamamelis, and Canadian maple trees. They bloom from November to February.

The biggest problem with growing these trees in the city is the high pH levels in Shanghai's soil, which is generally over eight. Most of the trees grow best in soil with a pH level of six to seven.
Once the level tops 8.5, the soil will lose its essential nutrients.

Researchers are looking for ways to lower the pH value and maintain a stable level.
The test results have been promising so far, but some hurdles remain.

"We have dropped the soil pH value, and now we have to keep it stable," said company General Manager Qian Youyu.

(Shanghai Daily February 22, 2006)

 

 

Tools: Save | Print | E-mail | Most Read

Related Stories
Shanghai Names Beautiful Landscaped Streets
Shanghai's Greenery Gets Winter Coats
Forest Coverage Tops 18.2%
Shanghai Honored Garden City Status
Shanghai Introduces New Tree-planting Method
 
SiteMap | About Us | RSS | Newsletter | Feedback
SEARCH THIS SITE
Copyright ? China.org.cn. All Rights Reserved ????E-mail: webmaster@china.org.cn Tel: 86-10-88828000 京ICP證 040089號
    1. <ul id="556nl"><kbd id="556nl"><form id="556nl"></form></kbd></ul>
      <thead id="556nl"></thead>

      1. <em id="556nl"><tt id="556nl"></tt></em>
        <ul id="556nl"><kbd id="556nl"><form id="556nl"></form></kbd></ul>

        <ul id="556nl"><small id="556nl"></small></ul>
        1. <thead id="556nl"></thead>

          亚洲人成网站18禁止中文字幕,国产毛片视频在线看,韩国18禁无码免费网站,国产一级无码视频,偷拍精品视频一区二区三区,国产亚洲成年网址在线观看,国产一区av在线 人妻无码久久影视 日韩久久久久久久久久久久 精品国产香蕉伊思人在线 无码国产手机在线a√片无灬 91在线视频无码