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Sollicitatie Hoofd MV lab Engels 2015

Sollicitatie Labhoofd Biotech 2015 English

Sollicitatie labhoofd Biotech 2015

Sollicitatie labhoofd Microbiovet lab 2015

Aangepast Vacature extern Manager Kwaliteitszorg 2017 06 13 final

Manager Bosmanagement 2017 10 30

Carrieredag Bos- en

Verken je
   in de bos- en natuursector
   Woensdag 27 juni 2012
   Meer info [pdf 1mb]  

Launch Specialist
Journal “Bos en Natuur
   April 2010
   Download here [pdf 2mb]

Laboratorium folder Januari 2014”
   Januari 2014
   Download here [pdf 785Kb]

ACT-Suriname gaat samenwerking aan met CELOS
   December 2017
   Download here [pdf 61Kb]

Reports Passed Events:
Proceedings CELOS Forest
   Management System
   (7 April 2006)
Seminar about Land use and
   Amazon Initiative
   (7 March 2006)
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Agro Experiments Sites
Biodiversity Bigi Pan

Edible Mushrooms

Projects & Experiments: Experiments: Edibile Mushroom Research at Celos


The research of the cultivation of edible mushrooms suitable for the climate of Suriname,
started long ago, but with the building of an indoor cultivation chamber in 2002 the
experiments took a more serious turn.

The experiments were done with two edible mushrooms, which are:

  • Volvariëlla volvacea; this is also called the straw mushroom, because it is mainly cultivated at rice straw
  • Pleurotus sajor-caju; this also called oyster mushroom. There are many pleurotus spp. that are called oyster mushroom.

    The research at Celos contained:
  • The making of pure cultures on different kind of media
  • The making of mother and planting spawn
  • The cultivation of volvariëlla and pleurotus on different kinds of agricultural waste,
    outdoor and indoor
Fig. 1: Pure cultures of Volvariëlla
volvacea and Pleurotus sajor-caju
  Ad A. With “pure cultures” is meant the cultivation of the fungi of the edible
mushroom on sterile Petri dishes or culture tubes, which contains a solid media of
agar plus a starch source. This starch source can exist of potato starch, malt or even
maize starch. At Celos experiments were done Potato Dextrose Agar, Malt Extract
Agar and Saboraoud media. The results of these experiments were a success.

Ad B. The pure cultures were used to make mother spawn. This is made of cooked paddy grains which were put in bottles and then sterilized. After sterilization the grains were inoculated with the pure cultures of the fungi. The fungi grew on to the grains and after 2 – 3 weeks the grains were fully covered with the fungi. The substrate of the planting spawn was made of dried, chopped and sterilized agricultural waste or by-products. This substrate was inoculated with the grains of he mother spawn. After 2 – 3 weeks the substrate was fully colonized by thefungi. The problems which sometimes occurred during the preparation of mother and planting spawn were that other heat resistant fungi grew on the grains or the substrate. This caused contamination and these had to be excluded for further research.

Fig. 2: Mother spawn Ad C. The cultivation of Volvariella and Pleurotus were done on agricultural waste which are abundant in Suriname. These are rice straw, banana leaves, saw shavings and saw dust, leaves of corn cobs, and soybean hulls. These waste products were first soaked and then pasteurized.

Fig3: Soaking of the substrate

  The cultivation took place in the indoor chambers, but also outdoor which means under the natural climate conditions.
The investments for the indoor cultivation were costly and laborious, but the yields were higher than the outdoor cultivation.
Pleurotus sajor-caju is far more easily to cultivate than Volvariëlla volvacea, because:
• it is not dainty about the substrate it grows on
• it fructifies even if there is a contaminant
• it has a broad temperature range
Fig 3 a: Steam pasteurization of soakedSubstrate Volvariëlla volvacea has a very short cycle in which it fructifies, but the fungus is not strong. It does not survive if there are contaminants; for outdoor cultivation it is season bounded, because it only fructifies at 28-32 ˚C and its best substrate on which it grows seems to be rice straw in our experiments. On banana leaves it also fructified and gave larger mushrooms, but the amount was less than on rice straw.
 Fig. 4: Outdoor cultivation Nowadays we are still doing research at Celos with these mushrooms and we welcome all those who have experience in cultivating mushrooms
in the tropics, so that we can broaden our knowledge.

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Fig. 4a: Indoor cultivation





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