Hoi ruud
ooit wel eens gezaaid en dat kwam wel op, maar niet geweldig. Ongeveer vijf planten uit 20 zaden. Wat ik toen anders heb gedaan dan jij nu weet ik niet meer. Het zijn wel planten uit extreme gebieden, dus de ontkiem reactie zal wel gevoelig zijn voor allerlei invloeden als tijdstip, temperatuur en vocht. Onderstaand artikel geeft aan dat ze denken dat de zaden niet erg lang in de grond overleven.
www.fs.fed.us/database/feis/plants/shrub/fouspl/all.html
en een klein stukje tekst uit het artikel:
Freeman [16] stated that each ocotillo plant produces at most a few
hundred highly viable seeds (viability of 90%) per year that are known
to germinate after rain. Germination remains relatively high (about
40%) even after 8 days of exposure to temperatures of 104 degrees
Fahrenheit (40 deg C) for 12 hours each day. This lack of sensitivity
to high temperatures suggests that ocotillo can germinate readily after
late summer rains. Ocotillo seeds probably do not survive for long in
the soil. Ocotillo probably requires a sequence of favorable conditions
to regenerate well, such as heavy winter rain for seed production
followed by heavy summer rain for seedling establishment [78]. Shreve
[55] reported that ocotillo had low and erratic seedling establishment
and a large amount of seedling mortality due to moisture stress. After
summer rains extremely high densities of seedlings (more than 100/sq m)
were observed, but less than 1 percent of those survived to 1 year of
age. Survival from year 1 to 7 was approximately 27 percent. No
ocotillo seedlings were found in the months following heavy September
rainfall in a desert community in San Diego County, California [78].
Het zijn wel super interessante planten.
groet
ruud
