dizzlekush
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Cannabinoid Profile and Elemental Uptake of Cannabis sativa L. as Influenced by Soil Characteristics.
"Soil Mg was negatively correlated with Ag THC concentrations in leaf tissue (Table 7). Mean Ag THC concentrations greater than 6,900 ppm were found in leaf tissue of plants grown on two soils with <40 ppm extractable Mg. However, one soil with <40 ppm Mg produced plants with a mean Ag THC concentration of only 2,257 ppm(Table 6, soil 3). Plant N, previously shown negatively correlated with soil Mg(Table 4), was positively correlated with Ag THC (Table 7). Haney and Kutscheid (1973) reported positive correlation of total soil N with A~THC levels in wild C. sativa in Illinois. A highly significant positive correlation was found for the Ca/Mg soil ratio to A~THC concentration (Table 7). A balance between Ca and Mg appeared to be required for maximum Ag THC accumulation in leaf tissue. As Mg levels increased relative to Ca, Ag THC concentrations decreased. These relationships will be examined in future experiments....
Ratios of concentrations of /xgTHC/CCC were positively correlated with leaf P, P/Fe, and P/Zn ratios (Table 8). Consequently, the P content of plant tissue seemed to affect the A~THC-CCC relationship, which
suggested involvement of P in CCC breakdown or /~gTHC formation. Added involvement of P was shown by the positive correlation between the A~THC/ CBD ratio and plant P. Several writers have indicated that CBD may be a precursor of Ag THC in C. sativa (Kiippers, Lousberg, and Bercht, 1973; Farnsworth, 1969). These data suggested that increased concentrations of P in leaf tissue may have enhanced the conversion of CBD to Ag THC.
Cannabinoids belong to the chemical class of natural terpenophenols. P may be involved in cannabinoid reactions by interaction of geraniol phosphate and olivetol which may form CBD precursors (Mechou- lam, 1973). These, in turn, may transform to Ag THC and eventually CBN."
Responses of Greenhouse-grown Cannabis sativa L. to Nitrogen, Phosphorous, and Potassium.
"Concentration means of CBD and A°THC ranged from 183 to 2,532 ppm and 2,434 to 9,472 ppm, respectively, but did not differ significantly among treatments (Table 5). Mean total yields of AO THC ranged from 0.3 mg to 61.2 rag/plant and were significantly different among treatments. The significance of these differences was largely due to growth responses to P. Total AO THC yield was significantly correlated with soil P205and applied P (r --- 0.82,** 0.84,** respectively). Concentrations of CBD and AO THC were both positively correlated with soil P205(Table 6) and plant P (Table 7).
Plant Mn and Ca were negatively correlated with CBD and A9THC concentrations (Table 7). These relationships probably reflected the influence of P on cannabinoid concentrations and on Mn and Ca levels in the plants. Plant B and Zn were also negatively correlated with concentration of Ag THC.The biochemical mechanisms responsible for synthesis of cannabinoids are not clearly understood; therefore, we cannot yet explain how previously discussed elements affect cannabinoid production. Phosphorus may be involved in cannabinoid biosynthesis via the interaction of geraniol phosphate and olivetol (Mechoulam,. 1973). The other elements may affect related enzymatic reactions."
Seems to be some possible benefits of high P after all, in late bloom especially. Mg having negative correlations with THC surprises me personally.
"Soil Mg was negatively correlated with Ag THC concentrations in leaf tissue (Table 7). Mean Ag THC concentrations greater than 6,900 ppm were found in leaf tissue of plants grown on two soils with <40 ppm extractable Mg. However, one soil with <40 ppm Mg produced plants with a mean Ag THC concentration of only 2,257 ppm(Table 6, soil 3). Plant N, previously shown negatively correlated with soil Mg(Table 4), was positively correlated with Ag THC (Table 7). Haney and Kutscheid (1973) reported positive correlation of total soil N with A~THC levels in wild C. sativa in Illinois. A highly significant positive correlation was found for the Ca/Mg soil ratio to A~THC concentration (Table 7). A balance between Ca and Mg appeared to be required for maximum Ag THC accumulation in leaf tissue. As Mg levels increased relative to Ca, Ag THC concentrations decreased. These relationships will be examined in future experiments....
Ratios of concentrations of /xgTHC/CCC were positively correlated with leaf P, P/Fe, and P/Zn ratios (Table 8). Consequently, the P content of plant tissue seemed to affect the A~THC-CCC relationship, which
suggested involvement of P in CCC breakdown or /~gTHC formation. Added involvement of P was shown by the positive correlation between the A~THC/ CBD ratio and plant P. Several writers have indicated that CBD may be a precursor of Ag THC in C. sativa (Kiippers, Lousberg, and Bercht, 1973; Farnsworth, 1969). These data suggested that increased concentrations of P in leaf tissue may have enhanced the conversion of CBD to Ag THC.
Cannabinoids belong to the chemical class of natural terpenophenols. P may be involved in cannabinoid reactions by interaction of geraniol phosphate and olivetol which may form CBD precursors (Mechou- lam, 1973). These, in turn, may transform to Ag THC and eventually CBN."
Responses of Greenhouse-grown Cannabis sativa L. to Nitrogen, Phosphorous, and Potassium.
"Concentration means of CBD and A°THC ranged from 183 to 2,532 ppm and 2,434 to 9,472 ppm, respectively, but did not differ significantly among treatments (Table 5). Mean total yields of AO THC ranged from 0.3 mg to 61.2 rag/plant and were significantly different among treatments. The significance of these differences was largely due to growth responses to P. Total AO THC yield was significantly correlated with soil P205and applied P (r --- 0.82,** 0.84,** respectively). Concentrations of CBD and AO THC were both positively correlated with soil P205(Table 6) and plant P (Table 7).
Plant Mn and Ca were negatively correlated with CBD and A9THC concentrations (Table 7). These relationships probably reflected the influence of P on cannabinoid concentrations and on Mn and Ca levels in the plants. Plant B and Zn were also negatively correlated with concentration of Ag THC.The biochemical mechanisms responsible for synthesis of cannabinoids are not clearly understood; therefore, we cannot yet explain how previously discussed elements affect cannabinoid production. Phosphorus may be involved in cannabinoid biosynthesis via the interaction of geraniol phosphate and olivetol (Mechoulam,. 1973). The other elements may affect related enzymatic reactions."
Seems to be some possible benefits of high P after all, in late bloom especially. Mg having negative correlations with THC surprises me personally.
