Welcome To Website IAS

Hot news
Achievement

Independence Award

- First Rank - Second Rank - Third Rank

Labour Award

- First Rank - Second Rank -Third Rank

National Award

 - Study on food stuff for animal(2005)

 - Study on rice breeding for export and domestic consumption(2005)

VIFOTEC Award

- Hybrid Maize by Single Cross V2002 (2003)

- Tomato Grafting to Manage Ralstonia Disease(2005)

- Cassava variety KM140(2010)

Centres
Website links
Vietnamese calendar
Library
Visitors summary
 Curently online :  4
 Total visitors :  898735

Sulphur, the long-neglected nutrient in oil palm cultivation
Thursday, 2013/08/01 | 08:34:47

July 31, 2013. Penang, Malaysia – With much attention given to the importance of NPK in oil palm nutrient management, sulphur (S) has been largely ignored.

 

Sulphur was hardly an issue in the past, thanks to abundant S availability from existing soil organic matter, organic fertilizers, volcanic eruptions, forest burning and crop residue. Early research on oil palm nutrition in Malaysia did not reveal the need for S supply due to the widespread use of ammonium sulphate as N source. However, recent findings indicate S input has diminished from continuous S removal due to crop harvesting and leaching. In Indonesia, the popularity of S-free fertilizers (e.g. urea, rock phosphate, dolomite) in recent years, on top of the sulphate leaching, has exacerbated the condition.


Analyses of samples from Indonesian oil palm growing regions reveal a disturbing trend. Data were obtained from best management practice (BMP) projects established by the International Plant Nutrition Institute, Southeast Asia program (IPNI SEAP) together with plantation groups in Sumatra and Kalimantan between 2007 and 2011. While the BMP projects did not directly address the management of sulphur, leaf samples from the reference blocks of six sites, representative of standard estate practice in Indonesia, were assessed for S nutrient status. All sites reported a continuous decline in S status ( J. Gerendás et al., 2011. Function and nutrient status of sulphur in oil palm in Indonesia. Tropentag Bonn, Germany (http://www.tropentag.de).

From observations on-site and other crop research studies, IPNI SEAP and partners have proposed a new critical S concentration of 0.15%, substantially lower than the 0.2% published value (Fairhurst, T.H, et al., 2005, Oil Palm Series Volume 7, Pocket Guide: Nutrient Disorders and Nutrient Management). Even with the revised values, datasets from the BMP projects in 2009 show that S status is insufficient at all sites, reporting levels even lower than the proposed 0.15%.

An essential component of protein and enzymatic co-factors, S is important for the formation of oil in crops. In several oil crops, deficiency in S leads to a decrease in oil formation, affecting oil yield. Drawing from these experiences in other oil crops, the study authors anticipate that the application of S nutrient will increase oil palm yield in S-deficient plantations.

The substantial impact of sulphur on N-use efficiency and oil formation also warrants a closer look at S status. The study recommends a N/S ratio of 10/1 in the fertilizer application regime to be adequate for oil palm cultivation. The moderate cost of adding S into the fertilizer mix is likely minimal when compared to the potential increase in oil yields that lead to greater profitability. Research is now being conducted to support this hypothesis, with field trials to assess yield response to S application, in order to support sustainable S fertilization using the 4R nutrient stewardship concept.

– end –


Contact
Dr. Thomas Oberthür, IPNI Director of Southeast Asia Program
Email: toberthur@ipni.net

Back      Print      View: 282

[ Other News ]___________________________________________________
  • Visit to the Experimental Bt Cotton Field in Egypt
  • Bill Gates Accepts Hunger Award
  • Kufuor And Da Silva Receive World Food Prize
  • Workshop on Effective Management of Insect Resistance Programs in South Africa
  • Agbiotech Vietnam Awards Winners Of Biotech Writing Competition
  • DuPont chief: Biotech can help small farmers
  • Scientists Develop New Bt Toxins Against Insect Pests
  • Exploring the “last frontier” of our genome
  • Vietnamese president visits IRRI
  • Jgi Selects 41 Projects For 2012 Community Sequencing Program
  • Coffman Receives 2011 Mentoring Award
  • Genome Sequence Of Pigeonpea, An Orphan Legume Crop Decoded
  • Seminar On Liability And Redress For Damage To Biological Diversity In China
  • Strawberries good news for combating alcohol's effect on stomachs, scientists say
  • 7th International Congress on Nitrogen Fixation
  • Vietnam leads in taking action to curb insecticide misuse to reduce threats to rice production
  • Philippines Celebrates 7th National Biotechnology Week
  • Cmdv To Accelerate Conventional Breeding In Malaysia
  • Lupin Genome Map Unraveled
  • Vietnam Takes Asean Lead In S&T Meetings
Designed & Powered by WEBSO CO.,LTD