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market-farming - Re: [Market-farming] ideal lighting for lettuce

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  • From: Richard Robinson <rrobinson AT nasw.org>
  • To: Market Farming <market-farming AT lists.ibiblio.org>
  • Subject: Re: [Market-farming] ideal lighting for lettuce
  • Date: Tue, 26 Oct 2010 12:59:14 -0400

Here are a few references that may be of interest.

http://www.actahort.org/books/22/22_25.htm
"The possibilities of growing the crop entirely in artificial light are
discussed, but it is concluded that only during the early propagation stage
is the use of artificial light likely to be economic. The high efficiency of
energy conversion at low light intensities, however, suggests that greater
responses may be obtained from lower levels of supplementary light than might
have been thought worthwhile. "

http://www.actahort.org/books/230/230_40.htm
"The result showed that day/night cycle ranging from 6 to 72 hr had little
effect on lettuce growth, "

http://www.springerlink.com/content/lq51917k31x69418/
"24 hours of artificial light supply improved yield and decreased nitrate
content, but did not affect Vitamin C content. "

I searched Google for "lettuce artificial light requirements."

--
Richard Robinson
www.nasw.org/users/rrobinson/
Hopestill Farm
www.hopestill.com



On Tue, 26 Oct 2010 09:42:18 -0700, alicia best wrote:
> Hi all, I grow lettuce year round in north eastern washington state in a
> greenhouse.  The house is kept warm with a big wood burning stove and light
> is provided.  What I am wondering is how much light is ideal for the
>lettuce? 
>  Any thoughts and suggestions would be greatly appreciated.  alicia in north
> eastern wa where there is the threat of snow soon
>
>
> From: waldenfarm AT bellsouth.net
> To: market-farming AT lists.ibiblio.org
> Date: Mon, 25 Oct 2010 10:59:41 -0400
> Subject: [Market-farming] test
>
> test
>
>
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