| 摘要: |
| 【目的】研究不同施肥处理对丹参叶片光合光响应特性的影响，为丹参大田高产栽培的施肥管理提供理论依据。【方法】以大田移栽丹参为研究对象，设CK（对照）、MX（混合肥）、N10（施用尿素215.5 kg/hm2）、N20（施用尿素431.0 kg/hm2）4个处理，通过Li 6400光合测定仪测定丹参叶片的光响应曲线。【结果】施肥处理显著增加了丹参的净光合速率（Pn）和最大净光合速率(Amax)，N20处理显著增加了丹参的蒸腾速率（Tr）、胞间CO2浓度(Ci)和气孔导度(Gs)；丹参的光饱和点(LSP)与光补偿点(LCP)在N10处理下降低，N20处理下升高，而混合肥处理下前者升高后者降低。【结论】氮肥可提高丹参叶片的净光合速率，混合肥处理下丹参的光合潜力增加。 |
| 关键词: 丹参 施肥 光响应 光合作用 |
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| 基金项目:国家“十一五”支撑计划项目(2007BAD79B06，2008BAD98B08-3） |
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| Effect of fertilization treatment on the photosynthetic light-response characteristics of Salvia miltiorrhiza Bunge |
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LIU Hongyun1, LIANG Zongsuo1,2, SHU Zhiming,et al1
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1.College of Life Sciences, Northwest A&F University;2.Institute of Water and Soil Conservation, Chinese Academy of Science
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| Abstract: |
| 【Objective】The research studied the relationship between the photosynthetic light-response curves and fertilizing treatments of Salvia miltiorrhiza to provide a basis for optimal fertilization in field cultivation.【Method】The photosynthetic light-response curves of S.miltiorrhiza under four fertilizing treatments,CK,MX,N10 and N20,were measured using a Li-6400 portable photosynthesis system.A modified nonrectangular hyperbola was adopted to fit the light-response curves.【Result】Compared with CK treatment,the net photosynthetic rate (Pn) and the maximum net photosynthetic rate(Amax) was increased significantly under N10,N20 and MX treatment;the values of transpiration rate (Tr),intercellular CO2 concentration(Ci),and stomatal conductance (Gs) were increased significantly under N20 treatment.The values of light saturation point (LSP) and light compensation point (LCP) were decreased in N10 treatment,increased in N20 treatment;but in MX treatment,the former was increased,the later decreased.【Conclusion】These results indicated that the nitrogen fertilization can increase the net photosynthetic rate and the photosynthetic ability of S.miltiorrhiza was enhanced under mixture fertilization treatment. |
| Key words: Salvia miltiorrhiza Bunge fertilization light response photosynthesis |
