한국농림기상학회지, 제 14권 제1호(2012) (pISSN 1229-5671, eISSN 2288-1859)
Korean Journal of Agricultural and Forest Meteorology, Vol. 14, No. 1, (2012), pp. 28~38
DOI: 10.5532/KJAFM.2012.14.1.028
ⓒ Author(s) 2014. CC Attribution 3.0 License.

시설양묘과정에서 관수 주기 처리에 따른 두 활엽수종의
생장 및 광합성 기구 변화

조민석(1), 이수원(2), 황재홍(1), 김재원(1)
(1)국립산림과학원 산림생산기술연구소, (2)한국임업진흥원 개발확산팀

(2012년 02월 28일 접수; 2012년 03월 28일 수정; 2012년 03월 30일 수락)

Growth Performance and Photosynthesis of Two Deciduous Hardwood
Species under Different Irrigation Period Treatments in a
Container Nursery System

Min seok Cho(1), Soo won Lee(2), Jaehong Hwang(1), Jae won Kim(1)
(1)Forest Practice Research Center, Korea Forest Research Institute, Pocheon 487-821, Korea
(2)Division of Forestry Consulting, Korea Forestry Promotion Institute, Seoul 121-904, Korea

(Received February 28, 2012; Revised March 28, 2012; Accepted March 30, 2012)

This study was conducted to investigate growth performance, photosynthesis, water use efficiency (WUE), and stomatal conductance (gs) of container seedlings of Liriodendron tulipifera and Zelkova serrata growing under three different irrigation periods (1 time/1 day, 1 time/2 days and 1 time/3 days) for high seedling quality. The root collar diameter and height of L. tulipifera and Z. serrata seedlings were highest with 1 time/1 day irrigation, whereas they were lowest with 1 time/3 days irrigation. The two species showed low drought tolerance. As irrigation period was shortened, biomass and seedling quality index (SQI) of the two species increased. The ratio of height to root collar diameter (H/D) and the ratio of below to aboveground biomass (T/R) of the two species were lower with 1 time/3 days than at other irrigation periods. L. tulipifera and Z. serrata seedlings showed significantly higher photosynthetic capacity with 1 time/1 day irrigation. As irrigation period was shortened, gs of two species increased, while their WUE decreased significantly (P<0.05) These results show that 1 time/1 day irrigation provides the most optimal water condition for container seedling production of two species and irrigation controlling is very important for growth and quality of container seedlings.

Keyword: Irrigation period, Container seedling, Photosynthesis, Growth performance, Liriodendron tulipifera, Zelkova serrata



본 연구는 주요 조림수종인 백합나무와 느티나무 용기묘를 대상으로 수분 조건에 가장 큰 영향을 미치는 관수 주기 처리 별 생장 특성 및 광합성 능력, 수분이용효율, 기공전도도 등 광합성 기구의 변화를 조사·분석하여, 용기묘 양묘 시 최적의 수분 환경을 구명하고자 실시하였다. 백합나무와 느티나무의 근원경과 간장 생장 및 상대생장량은 1회/1일 관수 처리구에서 가장 높았으며, 관수 주기가 짧을수록 생장이 우수한 경향을 보였다. 물질생산량과 묘목품질지수 또한 두 수종 모두 처리간 차이를 보이면서 관수 주기가 짧아질수록 높은 값을 나타냈다. 또한, 관수 주기가 길어질수록 수분 조건이 불량해짐에 따라 T/R율과 H/D율은 낮아지는 경향을 보였다. 광합성 능력은 두 수종 모두 1회/1일 관수처리구에서 다른 두 처리구에 비해 1.5~3배 이상의높은 값을 보였다. 수분이용효율은 두 수종 모두 1회/1일 관수 처리구에서 가장 낮았으며, 관수 주기가 길어질수록 수분 조건이 불량해짐에 따라 수분이용효율이 높아지는 경향을 보였다. 그러나 기공전도도는 관수 주기가 길어질수록 처리간 차이를 보이면서 값이 낮아지는 상반된 경향을 나타냈다.
본 연구 결과를 종합해 보면 수분 부족 시 증산량 감소와 동시에 수분이용효율이 증가되지만, 이에 따라 광합성 능력과 기공전도도의 감소 및 생장 저하와 불량한 묘목 품질이 초래되는 것을 알 수 있었다. 즉, 양묘과정에서 수종별 수분 요구도에 맞는 생육환경조절은 시설양묘시업에 의한 건전한 묘목을 대량 생산함과 동시에 조림과정에서도 높은 활착 및 생장으로 우수한 조림성과를 기대할 수 있을 것으로 판단된다. 또한 일률적인 관수를 실시하는 것이 아니라, 기간별 상대생장량을 조사하여 수종별 생장패턴에 따라 기간별수분 요구량에 맞는 집중·효율적인 관수를 실시할 수 있을 것으로 기대된다.


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