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[APD] Re: Monsoon season and increased growth of SAM's
Date: Wed, 05 Jan 2005 08:49:48 +0930
From: Dave & Robyn Wilson <aqua_green at bigpond.com>
Subject: Re: [APD] Re: nutrient build ups
To: Aquatic Plants Mailing List <aquatic-plants at actwin_com>
The Monsoon trough has dumped much water over Darwin NT in the last 10 days,
and the aquarium plants out in my ponds have shot ahead with growth that is
unbelievable. Apart from pollution dilution, lower light, cooler
temperatures (ponds are down from 30 to 25 deg C), what causes rainwater to
make everything grow much faster than anything else you try all year?
1. Cooler temps= more dissolved gases= more CO2/O2 in solution
2. More aerobic conditions= faster nutrient cycling by bacteria
3. More disturbance= response from plants(grow up or die due to lack of light in some rooted species, others go dormant till light becomes available)
4. Ain't it the summer "down yonder"? Generally the growing season if you have rain/water, while light can cause this, so can weather changes.
5. Removal of organic carbon(more aerboic conditions)
6. Resuspenison of sediments, laden with nutrients in the reduced form=. into the water column=> faster growth than root fertilization alone.
There are a few other things..........
Try doing large frequent or continous water changes all year and see(If H2O is available). Many growers in FL use this method, they use the spring water, cooler, laden with high CO2, lots of nutrients(even if at very low levels, they never run out).
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