CAJ | 학술논문

酸雨是一个严重的全球环境问题,中国亚热带地区的严重酸雨污染对森林生态系统的健康构成了潜在的威胁.文章研究了中国亚热带地区常见的6种常绿阔叶树种幼树在不同强度的模拟酸雨(pH 2.5,pH 4.0和pH 5.6)作用下,其叶片的叶绿素含量及可见光部分的光谱反射率的变化特征.结果表明,随模拟酸雨强度的增加,受试树种在pH 2.5和pH 4.0处理下的叶绿素含量均高于pH 5.6的处理;而可见光部分的光谱反射率则普遍低于pH 5.6的处理;pH 2.5和pH 4.0问的差异无显著规律.在经不同强度模拟酸雨作用后,各树种叶片在可见光部分的光谱反射率的差异主要集中在绿光反射峰及红边附近.受试树种对酸雨胁迫均表现出了一定的耐受性,较强的酸雨可在一定程度上对植物生长起到正的生物效应.
산우시일개엄중적전구배경문제,중국아열대지구적엄중산우오염대삼림생태계통적건강구성료잠재적위협.문장연구료중국아열대지구상견적6충상록활협수충유수재불동강도적모의산우(pH 2.5,pH 4.0화pH 5.6)작용하,기협편적협록소함량급가견광부분적광보반사솔적변화특정.결과표명,수모의산우강도적증가,수시수충재pH 2.5화pH 4.0처리하적협록소함량균고우pH 5.6적처리;이가견광부분적광보반사솔칙보편저우pH 5.6적처리;pH 2.5화pH 4.0문적차이무현저규률.재경불동강도모의산우작용후,각수충협편재가견광부분적광보반사솔적차이주요집중재록광반사봉급홍변부근.수시수충대산우협박균표현출료일정적내수성,교강적산우가재일정정도상대식물생장기도정적생물효응.
Acid rain is a worldwide environmental problem. Serious acid rain pollution in subtropical China has constituted a potential threat to the health of the local forest. In the present paper, the changing properties of the chlorophyll concentration and spectral reflectance at the visible wavelengths for the six subtropical broad-leaved tree species' leaves under simulated acid rain (SAR) treatment with different pH levels were studied. With the increasing strength of the SAR, the chlorophyll concentrations of the experimental species under pH 2. 5 and pH 4. 0 treatment were higher than that under pH 5. 6; the spectral reflectance at the visible wavelengths for pH 2. 5 and pH 4.0 were lower than that for pH 5. 6 in general; while there weren't significant differences between pH 2. 5 and pH 4. 0. After the treatment with different levels of SAR, the differences in spectral reflectance at the visible wavelengths mainly focused around the green peak and red edge on the reflectance curve. The subtropical broad-leaved tree species studied were relatively not sensitive to acid rain stresses;some stronger acid rain may accelerate the growth of the tree species used here to some extent.