Effect of potassium humate and nitrogen fertilizer on herb - Ozean ...

Journal <strong>of</strong> Applied Sciences 2(3), 2009
Table 3. <strong>Effect</strong> <strong>of</strong> <strong>potassium</strong> <strong>humate</strong> <strong>and</strong> /or <strong>nitrogen</strong> <strong>fertilizer</strong> under
irrigation intervals on the constituents <strong>of</strong> Origanum vulgare L.in the
second season.
Compounds
1 st Cut 2 nd Cut
Treatments
T1 T2 T3 T1 T2 T3
pinene
-- -- -- -- -- --
pinene
-- --- 0.67 -- -- --
terpinene -- -- -- 0.41 0.20 0.22
P-cymene 11.74 6.80 13.81 11.31 11.79 18.28
limonene 1.19 2.86 0.40 0.20 1.31 --
γ- terpinene 7.60 12.81 8.74 10.28 2.64 5.07
linalool 0.25 0.17 0.34 0.17 -- 0.19
borneol -- 0.11 0.42 0.20 -- 0.16
Terpinene-4-
ol
0.93 0.19 0.51
0.27 0.18 0.18
terpineol 0.45 0.29 0.46 0.12 0.22 0.36
thymol 1.05 1.30 0.57 1.27 1.00 0.44
Bornyl acetate 0.25 0.61 0.34 -- 0.34 0.27
carvacrol 69.07 65.26 68.25 65.35 73.61 61.65
Carvacrol
acetate
0.18 0.16 0.64
0.89 0.20 0.21
elemene 0.18 0.18 0.56 0.14 0.24 0.13
caryophyllene
0.53 0.54 0.41 0.11 0.49 0.12
germacrene D 0.19 0.12 0.45 0.23 0.27 0.21
Identified
compounds
93.61 91.40 95.57
90.95 92.49 87.39
Unidentified
compounds
6.39 8.60 4.43
9.05 7.51 12.61
T1–irrigation every 7 days +<strong>potassium</strong> <strong>humate</strong>, T2– 0.6 gNpot-1 +<strong>potassium</strong>
<strong>humate</strong>+ irrigation every 5 days, T3– 1.2 gNpot-1+ irrigation every 3 days
+ <strong>potassium</strong> <strong>humate</strong>
CONCLUSIONS
Nitrogen <strong>fertilizer</strong> increase herb fresh yield <strong>and</strong> essential oil production under well-watered conditions
at 80% available soil moisture, also under moderate-watered conditions at 60% available soil moisture
<strong>and</strong> under water deficit conditions at 40% available soil moisture. Increasing irrigation levels increased
the production <strong>of</strong> oregano <strong>and</strong> the optimum irrigation levels for the highest yields <strong>of</strong> fresh herb <strong>and</strong>
essential oil was 80% available soil moisture. Supplying plants with a water level <strong>of</strong> 80% available soil
moisture <strong>and</strong> with 1.2 g N pot -1 (I-80%+ N3) gave the best result in case <strong>of</strong> herb fresh yield <strong>and</strong>
essential oil production.
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