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CO2 and nitrogen status in plants
While not aquatic, this study does show how the relations between CO2
increases(just 2x ambient in this case, for aquariums using 30ppm CO2 as a measure, this is 10X ambient, so likely more effect) and how and why a higher concentration of NO3 is useful in conjunction with high CO2. Obviously NH4 would be nice as well, but the idea of 20-30ppm of NO3 is one thing, and the notion of 5-10ppm of NH4 is quite another(dead fish due to ammonia toxicity even at lower pH ranges). Lots of good stuff, although many are not going to get the names and all the relationships. Figures are between ambient(white) and elevated(black) CO2. http://www.blackwell-synergy.com/lin....00466.x/full/ Be nice to do such a study on rice and then perhaps a weed like Hydrilla or other aquatics. It's also not in submersed conditions which also would be nice to see and add leaf uptake of NH4/NO3. Regards, Tom Barr www.BarrReport.com |
#2
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CO2 and nitrogen status in plants
On Mar 16, 11:40 pm, wrote:
While not aquatic, this study does show how the relations between CO2 increases(just 2x ambient in this case, for aquariums using 30ppm CO2 as a measure, this is 10X ambient, so likely more effect) and how and why a higher concentration of NO3 is useful in conjunction with high CO2. Obviously NH4 would be nice as well, but the idea of 20-30ppm of NO3 is one thing, and the notion of 5-10ppm of NH4 is quite another(dead fish due to ammonia toxicity even at lower pH ranges). Lots of good stuff, although many are not going to get the names and all the relationships. Figures are between ambient(white) and elevated(black) CO2. http://www.blackwell-synergy.com/lin...65-3040.1999.0... Be nice to do such a study on rice and then perhaps a weed like Hydrilla or other aquatics. It's also not in submersed conditions which also would be nice to see and add leaf uptake of NH4/NO3. Regards, Tom Barr www.BarrReport.com http://jxb.oxfordjournals.org/cgi/co...ull/53/370/959 This is another good paper Note: NO3 uptake at night to resupply the reserves used all day. Regards, Tom Barr |
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