Some Konjac growing tips

joeb004(z3/4 MN)April 24, 2007

I came across this while doing some research and getting ready to try and take another shot this year.


Authors: J.A. Douglas, J.M. Follett, J.E. Waller

Keywords: shading, potash, nitrogen, lime, glucomannan


Konjac (Amorphophallus konjac) is being investigated as a new crop in New Zealand. Konjac corms were imported from Japan in 1996 and, following a quarantine period, plant material was multiplied and a research programme was begun. An investigation growing konjac corms under 30 and 50% shade cloth compared to no shade found the konjac yielded 66% more corms under 50% shade than without shade. After two seasonÂs growth, corms planted at an average weight of 105 g gave 2397 g total corm weight under 50% shade cloth with the largest individual corms approaching 2 kg. Without shade the total corm yield was 1442 g. Where konjac offsets were planted instead of corms there was no response to the shade treatments. Offsets planted at an average weight of 13 g gave total corm production of 368 g after two years with some individual corms reaching over 200 g. A fertiliser trial comparing three rates of nitrogen and three rates of potassium with and without lime found that lime and potassium increased yields but increasing rates of urea reduced yields after two seasonÂs growth. The results show konjac is a promising new crop for northern New Zealand. Research is continuing to investigate its potential.

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I am interested to grow wasabi commecially. I understand that Mr J Douglas has done extensive research on Wasabi. Do you have Mr Doulglas's email or phone contact so that I can contact him for some advice?

    Bookmark   June 26, 2011 at 11:35PM
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