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KMID : 0380319850350000069
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Journal of Korean Research Institute for Better Living
1985 Volume.35 No. 0 p.69 ~ p.74
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Effects of Temperature and Nitrate on Seed Germination in Amaranthus retroflexus and Chenopodium album
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Abstract
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The germination of seeds of Amaranthus retroflexus and Chenopodium album were carried out in two series of experiments. In the first series, the effects of different temperature (35℃, 23±2℃, 15/6℃) were studied and in the second, the effects of the same temperature combined with three different concentrations of potassium nitrate (0M, 0.002M, 0.02M).
The seeds of Amaranthus were incubated in continuous darkness, while the seeds of Chenopodium were in light. Germination was recognized when radicle appeared. During each examination all garminated seeds were counted and removed from the petri-dishes.
The highest germination rate for Amaranthus (95%) occurred at temperature of 35℃ and for Chenopodium (88%) occurred at 23±2℃. Which might be set as optimum temperature regime for germination. Chenopodium had generally wider temperature regime for germination than Amaranthus. In Chenopodium germination rate increased as nitrate concentration increased at 35℃ and 23±2℃. The greatest effects of nitrate were especially noticeable in the germintion of Chenopodium seeds at 23±2℃ temperature regime.
It appeared that germination with 0.02M nitrate solutions increased 2.0 times more than in the control. These results demonstrate that the action of potassium nitrate was beneficial for the germination of light-favored seeds.
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