ER9;30759 said:....do plants in their natural habitats have access to all the nutrients they need...all the time?
VaughnH;30761 said:They certainly have access to enough of the nutrients they need to grow to the reproductive stage, or they would soon die out. But, I'll bet none of us would be satisfied with an aquarium with plants in the same situation that those plants endure in nature. We, like farmers, want more healthy, better growing plants, with more of them growing well in our tanks. And, we aren't interested in them reproducing naturally, we prune them to keep them the way we like them.
VaughnH;30782 said:Even with your non-CO2 tanks, don't you prune occasionally? My impression is that most stem plants in nature like to lay on the water surface or the substrate, or they grow up out of the water to get CO2 and more light. With low growth rate tanks, don't the plants just take a lot longer to reach the water surface?
interesting....yes i do now although i had never really thought of it that way. species -vs- individual plant. some of the philosophies regarding fertilizing are starting to make better sense.Tom Barr;30768 said:Most systems are highly season, the water level also changes dramatically in most locations, Tropics etc, unless you like dry terrariums.....................
"Need" is quite another matter.
Need for the community or species?
Yes, for the individual plant? Leaf?
Very often not.
See the difference?
VaughnH;30803 said:Rough, back of an envelope calculation, if 100 million new planted tanks, all with pressurized CO2 could be set up this year, we could sequester a billion pounds of CO2 per year. That's worth a grant application!