CAJ | 학술논문

以无遮阴覆盖为对照,研究了1层膜遮阴(遮光率约30％)、2层膜遮阴(遮光率约55％)和3层膜遮阴(遮光率约75％)对2年生樟叶槭容器苗形态特征、光合作用参数和保护酶活性的影响。结果表明,1层遮阴处理樟叶槭容器苗生长健壮,主要表现为株高、叶片数、单株叶面积、根系质量、根直径、根系总长和须根数等生长指标均显著升高；叶绿素总量、叶绿素a( Chl. a)、叶绿素a/b( Chl. a/Chl. b)以及净光合速率( Pn )、蒸腾速率( Tr )和气孔导度( Gs )等光合参数均显著升高,叶绿素b( chl. b)无显著变化；还原性谷胱甘肽酶( GSH)、过氧化物酶( POD)、过氧化氢酶(CAT)和超氧化物歧化酶(SOD)活性均显著升高,MDA含量显著下降；2层膜和3层膜遮阴处理樟叶槭容器苗的各项生长指标下降显著,光合作用水平下降。因此,夏季适度遮阴能促进樟叶槭容器苗的生长。
이무차음복개위대조,연구료1층막차음(차광솔약30％)、2층막차음(차광솔약55％)화3층막차음(차광솔약75％)대2년생장협축용기묘형태특정、광합작용삼수화보호매활성적영향。결과표명,1층차음처리장협축용기묘생장건장,주요표현위주고、협편수、단주협면적、근계질량、근직경、근계총장화수근수등생장지표균현저승고；협록소총량、협록소a( Chl. a)、협록소a/b( Chl. a/Chl. b)이급정광합속솔( Pn )、증등속솔( Tr )화기공도도( Gs )등광합삼수균현저승고,협록소b( chl. b)무현저변화；환원성곡광감태매( GSH)、과양화물매( POD)、과양화경매(CAT)화초양화물기화매(SOD)활성균현저승고,MDA함량현저하강；2층막화3층막차음처리장협축용기묘적각항생장지표하강현저,광합작용수평하강。인차,하계괄도차음능촉진장협축용기묘적생장。
Taking no shading as control, the influence on the morphological characteristics, photosynthetic parame-ters, protective enzyme activity of two-year Acer cinnamomifolium container seedlings were investigated under the conditions of single-layer-membrane shading (70% of full illumination), two-layer-membrane shading (45% of full illumination), and three-layer-membrane shading (25% of full illumination). Container seedlings grew stronger in single-layer membrane shading treatment, the plant height, numbers of blade, leaf area, root weight, root diameter, total root length, fiber root number being improved. Total chlorophyll content, chlorophyll a, chlorophyll a/b, net photosynthetic rate( Pn ) , transpira-tion rate(Tr), stomatal conductance(Gs) were significantly increased, compared to the control. The activity of reduced glutathione( GSH) as well as the activities of peroxidase, catalase and superoxide dismutase were significantly boosted, while the concentration of MDA was deereased. The growth parameters of container seedlings were significantly inhibited in three-layer or two-layer membrane treatments. Therefore, one-layer-membrane summer shading treatment could promote the growth of A. cinnamomifolium container seed-lings.