September

25-26, 2003

Hangzhou,

Zhejiang, China

Potassium

and Sulphur are essential plant nutrients. In recent years, the

importance of potassium and sulphur fertilization is becoming more

and more significant in China, as tea production intensifies and

quality of tea is the priority in its production. Over the past

several years, Sulphate of Potash Information Board (SOPIB) and

The Sulphur Institute (TSI) have actively collaborated with Tea

Research Institute, Chinese Academy of Agricultural Sciences (TRI

CAAS) in conducting research on sulphate of potash and other sulphur

fertilizers and promoting the use of potassium and sulphur fertilizers

in tea fields. Experimental results indicate that about more than

70% and 50% of soils in the tea growing area in China are potassium

and sulphur deficient, respectively. Balanced fertilization with

potassium and sulphur increased the yield and improved quality of

tea, the yield was increased by 5.2% to 26.7% with the average of

15.1% and the quality components, especially amino acids were significantly

increased. In addition, the resistance to disease was also improved.

To increase

the awareness about the need for potassium and sulphur fertilization

and disseminate research information to local agricultural administrators,

researchers, extension workers, and farmers through on-site field

demonstrations, SOPIB, TSI and TRI CAAS are planning to organize

a national workshop entitled “Balanced Fertilization with Potassium

and Sulphur in Tea Production of China. The two-day workshop

will be held in Hangzhou, Zhejiang Province, China on 25-26th September,

2003. The program will include a workshop, a field tour and site

demonstrations. The expected participants will be agricultural extension

workers, tea farmers, scientists involved in agricultural research

and education projects in China, members of governmental administration

involved with the agricultural research and extension service, the

fertilizer industry and various farmers’ associations. The workshop

will demonstrate the effect of potash and sulphur fertilizers on

tea production in different soils, present the most recent available

results from research and their applications in Chinese tea production,

and discuss potash and sulphur requirements for quality tea production

and related extension programs. Based on TSI projections, China

is currently facing a sulphur deficit of about 900,000 tons for

agriculture use. This current annual deficit for sulphur fertilizers

in China will increase to 1.5 million tons by 2005, and to 2.3 million

tons annually by 2010, unless corrective measures are taken, which

represents nearly an additional 500,000 tons sulphur market potential

if 20% of the market is captured. The deficit for potash is several

times more than sulphur. With the awareness of potassium and sulphur

application on tea quality improvement, farmers will further increase

the use of potassium and sulphur fertilizers.

Mark your

calendars now to attend and share this announcement with your associates

who have an interest in this market. Delegates are encouraged to

register early to allow sufficient time to obtain their letter of

invitation and visa required for entry into China.

For additional

information, contact:

Michel Marchand

Chairman of

the Agronomic Committee of the Sulphate of Potash Information

Board Technical

Manager Fertilizers, Tessenderlo Chemie

Telephone:

33 3 21 06 40 05

Facsimile:

336 64 02 41 29

E-mail: michel.marchand@tessenderlo.com

Mingxian Fan

The Sulphur

Institute

1140 Connecticut

Avenue, NW

Suite 612

Washington,

DC 20036

USA

Telephone:

1 202 331 9660

Facsimile:

1 202 293 2940

E-mail: agmarkt@sulphurinstitute.org

Wenyan Han

Tea Research

Institute, Chinese Academy of Agricultural Sciences

Yunqi Road

1 (310008), Hangzhou City

Zhejiang Province

China

Telephone:

86 571 86650413

Facsimile:

86 571 86650056/86650413

E-mail: hanwy@mail.hz.zj.cn

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