单 位：
大丰区沿海林场;南京林业大学南方现代林业协同创新中心;江苏省水土保持与生态修复实验室;南京林业大学生物与环境学院
摘 要：
为增强沿海防护林的防灾、抗灾能力,提高其生态、经济和社会效益,本研究以乌桕-高粱和榉树-高粱2种林农复合经营系统为研究对象,通过野外模拟试验,研究其环境特征和农作物光合特性。结果表明,(1)在相同立地条件下,乌桕-高粱复合经营系统树木的树高、胸径生长率和林木成活率均大于榉树-高粱复合经营系统。(2)乌桕-高粱复合经营系统较榉树-高粱复合经营系统更利于降低林地光照度;前者调节空气湿度功能强,空气湿度为58. 13%,高于榉树-高粱复合经营系统。(3)高粱叶片净光合速率随着光照度的增加迅速升高,在乌桕林-高粱复合经营系统中高粱叶片净光合速率最大值为23. 15μmol/(m·s),比榉树-高粱复合经营系统中高粱高22. 64%; 2种林农复合经营系统中高粱叶片气孔导度变化趋势相近,差异不显著;乌桕-高粱复合经营系统中高粱胞间CO2浓度日均值比榉树-高粱复合经营系统中高粱低3. 10%;乌桕-高粱复合经营系统中高粱日均蒸腾速率较榉树-高粱复合经营系统中高粱低3. 44%。(4)影响高粱叶片光合作用的因素主要是净光合速率、气孔导度和蒸腾速率,其次是以空气温度为主的环境因子。在苏北沿海盐渍土上,乌桕-高粱复合经营系统较榉树-高粱复合经营系统更适合高粱生长,且改善环境功能更强。
译 名：
Study on environmental characteristics and photosynthesis characteristics of crops for agroforestry management systems in northern Jiangsu province
作 者：
FENG Yuan-yuan;HU Hai-bo;ZHU Wen-bin;XU Xiao-peng;ZHAO Ting-ting;Nanjing Forestry University Southern Modern Forestry Collaborative Innovation Center;Jiangsu Province Soil and Water Conservation and Ecological Restoration Laboratory;The Coastal Forest Farm of Dafeng District;College of Biology and the Environment,Nanjing Forestry University;
单 位：
FENG Yuan-yuan%HU Hai-bo%ZHU Wen-bin%XU Xiao-peng%ZHAO Ting-ting%Nanjing Forestry University Southern Modern Forestry Collaborative Innovation Center%Jiangsu Province Soil and Water Conservation and Ecological Restoration Laboratory%The Coastal Forest Farm of Dafeng District%College of Biology and the Environment,Nanjing Forestry University
关键词：
the coastal areas of northern Jiangsu province;;agroforestry management;;sorghum;;photosynthetic characteristics
摘 要：
In order to enhance the disaster prevention and resilience of coast protection forest and improve the ecological,economic and social benefits,the Sapium sebiferumSorghum and Zelkova schneideriana-Sorghum were used as the research objects,and the environmental characteristics and photosynthesis characteristics were studied. The results showed that under the same site conditions,the tree height,diameter growth-rate and survival rate of trees in the S. sebiferum-Sorghum compound management system were higher than those in the Z. schneideriana-Sorghum compound management system. The S. sebiferum-Sorghum compound management system was than the Z.schneideriana-Sorghum compound management system,and had stronger function of adjusting air humidity. The air humidity of S. sebiferum forest was58. 13%,which was higher than that of Z.schneideriana forest. The net photosynthetic rate of sorghum leaves increased rapidly with the increase of light intensity. In the S. sebiferum forest,the maximum net photosynthetic rate of sorghum leaves was23. 15 μmol/( m·s),which was 22.64% higher than that in Z. schneideriana forest. The stomatal conductance of sorghum leaves in the two agroforestry systems was similar,and the difference was not significant. The daily average of intercellular CO2 concentration in S. sebiferum forest was 3.10% lower and the transpiration rate was 3.44% lower than that in Z. schneideriana forest,respectively. Physiological factors were the main factors that affected the photosynthesis of sorghum leaves,followed by the environmental factors mainly based on air temperature. In summary,in the saline soil of the northern Jiangsu coast,the S. sebiferum-Sorghum compound management system was more suitable for sorghum growth than Z. schneiderianaSorghum management system,and it was more powerful for improving the environment.
