Mime-Version: |
1.0 |
Sender: |
|
Subject: |
|
From: |
|
Date: |
Tue, 8 Jun 1999 12:11:46 +0100 |
Content-Type: |
text/plain |
Reply-To: |
|
Parts/Attachments: |
|
|
Dear Chris Slade
_Male_ willows are the only ones to provide _pollen_ (and nectar) during spring,
females only provide nectar.
So size does not matter here :=)
Nectar is only energy source, pollen contains proteins and other substances taht
the beehive desperately needs during spring for the colony build-up.
Biofuel-Energy _is_ the main objective of energy belts, however, I have to
addresse the related, indirect (external) effects, too in my work.
Interannual variations play a role, but I cannot assess their importance at the
moment.
Mixtures of different willows are important also because of pest-attack-risk
minimisation strategies.
Sincerely
Med venlig hilsen
Bernd Kuemmel
---- ---- ---- ---- ---- ---- ----
Bernd Kuemmel, stud.lic. (PhD.stud.)
Royal Veterinary and Agricultural University (KVL)
Agrovej 10 + DK-2630 Taastrup
V: (+45) 35 28 35 33 + F: (+45) 35 28 21 75
http://www.agsci.kvl.dk/~bek/cfehtml.htm
|
|
|