인위적인 수분처리가 물푸레나무와 들메나무의 생장과 엽형특성에 미치는 영향 Effects of artificial water treatment on the growth and leaf characteristics of Fraxinus rhynchophylla and Fraxinus mandshurica원문보기
인위적인 수분처리에 대한 묘고생장 결과 물푸레나무는 수분처리의 영향을 크게 받지는 않았으나, 토양수분이 감소할수록 생장이 감소하였고, 들메나무는 상대적으로 토양수분이 높은 처리구$(78{\sim}90%)$에서 높은 생장을 보였다. 물푸레나무와 들메나무의 근원직경 또한 토양수분이 감소할수록 생장이 감소하는 경향을 보였다. 물질생산량의 변화는 물푸레나무의 경우 잎, 줄기, 뿌리 등 건중량이 각 처리구별로 토양내 수분이 낮아질수록 통계적으로 유의성을 보이면서 감소하는 경향을 나타냈으며, 토양수분이 $78{\sim}90%(A)$인 처리구에서는 상대적으로 $18{\sim}30%(D)$ 처리구에 비해 약 2배 이상 높은 물질 생산량을 나타 냈다. 들메나무도 각 처리구간에 차이를 보이면서 A처리구와 D의 처리구에서는 통계적으로 유의성을 보였다. 이는 토양수분이 묘목의 수세 약화 및 잎을 포함한 조직의 연화 등 생리적인 부분에 영향을 미치는 것으로 생각된다. 물푸레나무와 들메나무의 엽 특성중 SLA는 토양수분처리에 따라 통계적으로 유의성을 보이진 않았지만 처리구간 수분함량이 적을수록 감소하는 경향을 나타냈다. 그러나 LAR과 LWR의 경우에는 각 처리구간 토양내 수분함량이 적을수록 통계적으로 유의성은 나타나지 않았지만 증가하는 경향을 나타냈다.
인위적인 수분처리에 대한 묘고생장 결과 물푸레나무는 수분처리의 영향을 크게 받지는 않았으나, 토양수분이 감소할수록 생장이 감소하였고, 들메나무는 상대적으로 토양수분이 높은 처리구$(78{\sim}90%)$에서 높은 생장을 보였다. 물푸레나무와 들메나무의 근원직경 또한 토양수분이 감소할수록 생장이 감소하는 경향을 보였다. 물질생산량의 변화는 물푸레나무의 경우 잎, 줄기, 뿌리 등 건중량이 각 처리구별로 토양내 수분이 낮아질수록 통계적으로 유의성을 보이면서 감소하는 경향을 나타냈으며, 토양수분이 $78{\sim}90%(A)$인 처리구에서는 상대적으로 $18{\sim}30%(D)$ 처리구에 비해 약 2배 이상 높은 물질 생산량을 나타 냈다. 들메나무도 각 처리구간에 차이를 보이면서 A처리구와 D의 처리구에서는 통계적으로 유의성을 보였다. 이는 토양수분이 묘목의 수세 약화 및 잎을 포함한 조직의 연화 등 생리적인 부분에 영향을 미치는 것으로 생각된다. 물푸레나무와 들메나무의 엽 특성중 SLA는 토양수분처리에 따라 통계적으로 유의성을 보이진 않았지만 처리구간 수분함량이 적을수록 감소하는 경향을 나타냈다. 그러나 LAR과 LWR의 경우에는 각 처리구간 토양내 수분함량이 적을수록 통계적으로 유의성은 나타나지 않았지만 증가하는 경향을 나타냈다.
Although the result of the tree height growth after water treatment, Fraxinus rhynchophylla has little affection by the artificial water treatment, the growth showed decreased tendency as the soil moisture decreased, and F. mandshurica showed high growth in relatively high soil moist $78{\sim}9...
Although the result of the tree height growth after water treatment, Fraxinus rhynchophylla has little affection by the artificial water treatment, the growth showed decreased tendency as the soil moisture decreased, and F. mandshurica showed high growth in relatively high soil moist $78{\sim}90%$ treated area. The growth of root collar diameter of F. rhynchophylla and F. mandshurica also showed decreased tendency as soil moisture decreased. The changes of biomass according to dry weight of root, stem, leaves of F. rhynchophylla demonstrating statistical significance as moisture contents of soil is lower showing decreased biomass tendency and in the treatment of $78{\sim}90%$(A) moisture content showed more than double the higher biomass compare to the treated area of $18{\sim}30%$(D) moisture contents. Also F. mandshurica showed statistical significance in A and D treatment demonstrating differences among each treatment. This can be purported to have physiological effects like weakening of seedling and softening of tissues including leaves as soil moisture decreased. Ultimately it is regarded to the main reason of unsatisfactory growth for F. rhynchophylla and F. mandshurica that are weak to drought resistance. SLA, which is one of the special traits of leaf area of F. rhynchophylla, didn't show statistical significance between moisture process, it demonstrated decreased tendency as the moisture content interval is minimal. LAR and LWR showed increased tendency while moisture content didn't show statistical significance between treatments as they are minimal.
Although the result of the tree height growth after water treatment, Fraxinus rhynchophylla has little affection by the artificial water treatment, the growth showed decreased tendency as the soil moisture decreased, and F. mandshurica showed high growth in relatively high soil moist $78{\sim}90%$ treated area. The growth of root collar diameter of F. rhynchophylla and F. mandshurica also showed decreased tendency as soil moisture decreased. The changes of biomass according to dry weight of root, stem, leaves of F. rhynchophylla demonstrating statistical significance as moisture contents of soil is lower showing decreased biomass tendency and in the treatment of $78{\sim}90%$(A) moisture content showed more than double the higher biomass compare to the treated area of $18{\sim}30%$(D) moisture contents. Also F. mandshurica showed statistical significance in A and D treatment demonstrating differences among each treatment. This can be purported to have physiological effects like weakening of seedling and softening of tissues including leaves as soil moisture decreased. Ultimately it is regarded to the main reason of unsatisfactory growth for F. rhynchophylla and F. mandshurica that are weak to drought resistance. SLA, which is one of the special traits of leaf area of F. rhynchophylla, didn't show statistical significance between moisture process, it demonstrated decreased tendency as the moisture content interval is minimal. LAR and LWR showed increased tendency while moisture content didn't show statistical significance between treatments as they are minimal.
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제안 방법
A-year-old E rhynchophylla and E mandshurica seedlings were obtained from Northern Regional Forest Service and transplant the seedling into an ordinary plastic container (15 cmx 18 cmx 12 cm), lb exclude growth affect of seedlings in accordance with nutrient, the study used vermiculite, peat moss and perlite of culture soil of early April by mixing them up in a 1:1:1 ratio as growing media. And to minimize stress accompany by the transplanting, the seedling have been rooted until the early part of June to reinstate their normal physiological condition and selected 80 seedlings respectively for experimental measure.
The water treatments were executed in four steps starting from the early part of June in Iday, 3 days, 6 daysand 9 days increments. The soil moisture contents were calculated as following method after drying fixed amount of wet soil in an oven at 100- 105℃ temperature and the measuring was carried out 10 times per each treated area (Lee and Choi, 2001).
대상 데이터
The study was carried out in the facilitate greenhouse site of Wbnkwang University (college of natural science) from early April to September in 2006.
데이터처리
All the statistic analyses were carried out with multiple range test of Ducan utilizing the PC SAS program Ver. 8.0 (SAS, 2000).
Illative soil water; A: 78~90% B: 58~70% C: 38~50% D: 18~30% f: Means with the same letter within a column are not significantly different at 5% level by Duncan's multiple range test.
Relative soil water; A: 78~90% B:58~70% C:38~50% D:18~30% t: Means with the same letter within a column are not significantly different at 5% level by Duncan's multiple range test.
이론/모형
And to minimize stress accompany by the transplanting, the seedling have been rooted until the early part of June to reinstate their normal physiological condition and selected 80 seedlings respectively for experimental measure. The analysis of used growing media was analyzed by soil chemical analyzing method. The element contained in growing media essentially required for a tree to grow is the minimum.
성능/효과
As the characteristic of leaf area of E mandshurica had a same tendency to F. rhynchophylla, SLA didn't show statistical significance among each water treatment but relatively showed statistical significance in A and D treatments and it demonstrated decreased tendency as the moisture content interval is minimal. LAR and LWR showed increased tendency while moisture content didn't show statistical significance between each processing interval as they are minimal.
Dry weight of F. rhynchophylla and F. mandshurica seedling showed decreased tendency in every treated areas as the moisture content of soil decreased.
In exploring the changes of biomass according to moisture process, dry weight of leaves of F. rhynchophylla were 5.32 g, 4.66 g, 3.86 g and 2.92 g according to A, B, C and D treatments and the dry weight of stems were 10.17 g, 8.29 g, 5.32 g and 3.94 g and the dry weight of roots were 19.43 g, 14.13 g, 12.22 g and 11.77 g, demonstrating statistical significance as moisture content of soil is lower showing decreased biomass tendency and in the A treatment of 78 ~90% moisture content showed significantly higher biomass compare to the D treatment. As F.
22 cm2 in the treatment D, which demonstrate relatively higher leaf area with F rhynchophylla per moisture process tree compare to E rhynchophylla and the both species demonstrated higher leaf area value when soil water content is higher and as soil water content decrease, the value of leaf area also decreased. SLA, which is one of the special traits of leaf area of F. rhynchophylla, didn't show statistical significance between moisture process, it demonstrated decreased tendency as the moisture content interval was minimal.
The changes of dry weight according to E rhynchophylla and F. mandshuricds moisture process demonstrate decreased tendency with dry weight as the soil moisture ratio decreased and the main reason for the cause would be due to intense moisture deficiency and in which affects the two species, E rhynchophylla and E mandshurica that are weak to drought resistance. While F.
While the tree height RGR of F. mandshurica showed similarities in the order of A>B>C> and D treatment, F. mandshurica showed overall higher growth rate than E rhynchophylla and the higher the moisture content, the higher growth rate tendency were demonstrated.
). With the leaf area and dry weight measuring result, RGR of seedling, distribution ratio of seedling dry weight and T/R ratio, SLA (Specific leaf area=leaf area/leaf dry weight), LAR (leaf area ratio= leaf area/total diy weight), LWR (leaf weight ratio=leaf dry weight/total dry weight) was estimated.
후속연구
rhynchophylla and E mandshurica was not a long-term experiment, the observation was not distinct on difference of excess moisture and deficiency in case of the root collar diameter growth. Therefore, it is determined that there could be sufficient data on excess moisture and deficiency if detail studies are further carried out on the soil moisture that influences growth traits.
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