文献类型：期刊文献

中文题名：外生菌根真菌对不同氮浓度下马尾松幼苗生长和光合特性的影响

英文题名：Effects of nitrogen addition and ectomycorrhizal fungi on growth and photosynthetic characteristics of Pinus massoniana Lamb. seedlings

作者：孙鹏飞[1] 沈雅飞[1,2] 王丽君[1] 陈天[1] 张萌[1] 肖文发[1,2] 程瑞梅[1,2]

第一作者：孙鹏飞

机构：[1]中国林业科学研究院森林生态环境与自然保护研究所,国家林业和草原局森林生态环境重点实验室,北京100091;[2]南京林业大学南方现代林业协同创新中心,南京210037

年份：2023

卷号：41

期号：1

起止页码：112-120

中文期刊名：植物科学学报

外文期刊名：Plant Science Journal

收录：CSTPCD;;北大核心:【北大核心2020】；CSCD:【CSCD2023_2024】；

基金：中国林业科学研究院重点基金(92104-2021)。

语种：中文

中文关键词：氮添加;外生菌根真菌;马尾松;生长;光合作用

外文关键词：Nitrogen addition;Ectomycorrhizal fungus;Pinus massoniana;Plant growth;Photosynthesis

分类号：Q945

摘要：为探究马尾松(Pinus massoniana Lamb.)在日益加剧的氮沉降背景下接种外生菌根真菌(Ectomycorrhizal fungi,EMF)后的生理响应规律和适应机制,以1年生马尾松幼苗为对象,通过模拟氮沉降增加(氮添加量分别为0、30、60、90 kg N·hm^(-2)·a^(-1))和接种外生菌根真菌的方法,研究施氮和接菌对马尾松幼苗生长和光合特性的影响。结果显示:(1)在同一施氮浓度下,两种EMF均能促进马尾松幼苗的生长和光合作用,接种处理对株高、生长量、叶绿素b、Pn、Gs、Ci、Tr影响极显著,两种EMF在不同的施氮浓度下促生效果不同;(2)在一定的氮沉降范围内,氮素增加仍可以促进马尾松幼苗的生长,其径粗、地上部和地下部干质量随施氮浓度的升高呈递增趋势;(3)二者交互处理下,马尾松幼苗生长和光合各项指标均有所提高,其中株高、生长量和叶绿素b显著增加,说明施氮和接菌均能促进马尾松的生长。研究结果表明,在一定程度的氮沉降下接种EMF可以促进马尾松的生长和光合作用,提高马尾松的生产力,在未来氮沉降增加的背景下,施氮量增加仍对菌根化马尾松有促生作用。
To explore the physiological responses and adaptation mechanisms of P. massoniana Lamb.inoculated with ectomycorrhizal fungi(EMF) under increasing nitrogen deposition, one-year-old P. massoniana seedlings were inoculated with EMF and stimulated by nitrogen deposition(0, 30, 60, 90 kg N·hm^(-2)·a^(-1),respectively). The effects of nitrogen application and inoculation on the growth and photosynthetic characteristics of P. massoniana seedlings were then studied. Results showed that:(1) Under the same nitrogen concentration, both kinds of EMF promoted the growth and photosynthesis of P. massoniana seedlings, and inoculation had significant effects on plant height, growth, chlorophyll b, Pn, Gs, Ci, and Tr. The growth promoting effects of both EMF differed under different nitrogen concentrations.(2) Within a certain range of nitrogen deposition, increasing nitrogen promoted P. massoniana seedling growth. Diameter, aboveground dry weight, and underground dry weight increased with the increase in nitrogen concentration.(3) Under interactive treatment,the growth and photosynthetic indices of P. massoniana seedlings increased, among which plant height,growth, and chlorophyll b increased significantly, indicating that nitrogen application and EMF inoculation promoted P. massoniana growth. In general, EMF inoculation promoted the growth, photosynthesis, and productivity of P. massoniana under a certain range of nitrogen deposition. Under a background of increasing nitrogen deposition in the future, nitrogen application can promote the growth of mycorrhizal P. massoniana, providing a basis for the artificial afforestation of P. massoniana as a dominant tree species in the Three Gorges Reservoir area.