The Korean Journal of Ecology

The Ecological Society of Korea (한국생태학회)
권호 표지

Effects of Light and Nitrogen on the Growth of Pokeberry

미국자리공의 생장에 미치는 광과 질소의 영향

  • 박범진 (청주대학교 이공대학 생물학과) ;
  • 박용목 (청주대학교 이공대학 생물학과) ;
  • 최기룡 (울산대학교 자연대 생물학과)
  • Published : 1998.08.01
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Abstract

The growth of Phytolacca L. grown under three light regimes at three nutrient concentrations was analyzed. The effect of shading treatment on plnat growth was greater than that of nutrient treatment. Plant dry mass increased more than 5-fold during 21 days under 33% and 100% irradiances, whereas that was strongly reduced under 8% irradiance. Net assimilation rate decreased with plant growth irrespective of light and nutrient treatments, though the highest net assimilation rate was shown under 100% irradiance. Under 33% irradiance leaf area in plants supplied with nutrient solution increased to such extent as to compensate reduction in net assimilation rate, whic maintains almost identical growth rate with that under 100% irradiance. The relatonship between total plant nitrogen and leaf nitrogen content was dependent on the growth irradiance. Moreover, leaf nitrogen and specific leaf weight were also changed depending on the light and nutrient conditions. Based on these findings, it is suggested that the adaptive characteristics of Pokeberry plant to light and nutrient conditions may contribute to rapid extension of Pokeberry habital in Korea rocently.

Keywords

References

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