强弱光下高粱与苏丹草光合特性的比较研究  

Comparative Studies on Photosynthetic Characteristics of Sorghum and Sudangrass under Strong and Weak Light Conditions

作　　者：詹秋文[1] 方秋菊[1] 高文玲[1] 

机构地区：[1]安徽科技学院,凤阳233100

出　　处：《种子》2006年第11期11-13,共3页Seed

基　　金：安徽省科技攻关计划重点项目(No:06013104B);安徽省自然科学基金资助项目(No:01041102);安徽科技学院重点学科建设基金项目(No:YZD2004-03);安徽省高校学科拔尖人才资助(No:jmr200579)

摘　　要：采用C I-310便携式光合测定系统,对32份高粱和10份苏丹草品种进行强弱光下光合特性的比较研究。结果表明:高粱和苏丹草的各项光合指标除后者的胞间CO2浓度外,在强弱两种光照条件下均有显著或极显著差异。在弱光条件下,各项光合指标在高粱和苏丹草间均没有显著差异;但在强光条件下,高粱的蒸腾速率和胞间CO2浓度极显著或显著超过苏丹草。在弱光条件下,无论高粱或苏丹草,其净光合速率、蒸腾速率和气孔导度三者间均呈显著或极显著正相关;但在强光条件下,苏丹草的各项指标无显著相关,而高粱大部分指标间相关极显著。Four photosynthetic indices of sorghum and sudangrass were measured under strong and weak light conditions by CI-310 Portable Photosynthesis System. The results showed that the differences of net photosynthetic rate, transpiration rate, stomatal conductance of sorghum and sudangrass were significant between weak [PAR：353.07 μmol/（m^2·s）, in the overcast day] and strong[PAR：l 331.86 μmol/（m^2·s）, in clearcloudy day ], radiation, but internal CO2 of su the difference of every index between internal CO2 were significant between radiation, sorghum and sudangrass was not significant. But transpiration rate and sorghum and sudangrass under strong radiation. Under weak radiation, there were significantly positive correlated among net photosynthetic rate, transpiration rate and stomatal conductance in sorghum or sudangrass. Under strong radiation, there were not significant correlated among all indices of sudangrass; but there were significantly positive correlated among most indices in sorghum.

关 键 词：苏丹草 高粱 光合特性 比较 

分 类 号：S514[农业科学—作物学]