摘要
通过盆栽试验,研究了山西省襄垣县矿区复垦土壤在不同磷水平条件下接种AM真菌对矿区玉米苗期光合特性的影响。结果表明,不同磷水平梯度显著影响了矿区玉米苗期的光合速率、气孔导度、蒸腾速率和胞间CO2浓度等光合特性,在0～50 mg/kg的磷梯度范围内,光合速率随着磷质量分数的升高而升高,之后又随之降低;在25 mg/kg磷水平时,气孔导度和胞间CO2浓度达到最大值,之后又随着磷质量分数的升高而降低;而蒸腾速率却随着磷质量分数的增加而降低;接种丛枝菌根真菌(AM真菌)显著提高了玉米的光合速率和蒸腾速率;而降低了玉米叶片的胞间CO2浓度,在25 mg/kg磷水平时降低幅度最大,达到了49%;但接种AM真菌对矿区玉米叶片的气孔导度没有显著影响。
This experiment studies the effects of arbuscular mycorrhiza fungus on photosynthesis characteristic of the maize in mine area under different phosphorus concentration.The results reveal the following： The different phosphorus concentration significantly affects the photosynthesis rate（Pn）,transpiration rate（Tr）,stomatal conductance（Gs）,and intercellular CO2 intensity（Ci） of the photosynthetic characteristics of the maize in mining area.It manifests that Pn.goes up with phosphorus concentration increase in 0 ~ 50 mg/kg of phosphorus concentration range and they drop when the phosphorus concentration is too high.In the 25 mg/kg of phosphorus concentration,Gs and Ci reach the maximum,and later reduce with phosphorus concentration increase.But the Tr drops with phosphorus concentration increase.Besides,arbuscular mycorrhiza fungus（AM fungus） remarkably improve the Pn and Tr of maize and ruduce the maize leave in Ci lowering the largest amount up to 49% under 25 mg/kg phosphorus level.But AM fungus inoculation doesn＇t notebly influence the Gs.
出处
《山西农业科学》
2013年第8期834-837,855,共5页
Journal of Shanxi Agricultural Sciences
基金
山西省重大科技攻关项目(20060310990103)
山西省科技厅青年基金项目(2011021031-1)
关键词
矿区
磷
丛枝菌根真菌(AM真菌)
玉米
光合特性
mining area
phosphorus
arbuscular mycorrhiza fungus
maize
photosynthesis characteristic
