摘要
为促进太子参高产栽培,采用单因素试验研究大田条件下多效唑不同浓度叶面喷施对太子参叶片光合特性与产量的影响。结果表明:叶面喷施多效唑能提高太子参的叶绿素含量,随着多效唑浓度的增高太子参的叶绿素a和叶绿素b均呈上升趋势。多效唑可促进叶片净光合速率、蒸腾速率和气孔导度及胞间二氧化碳浓度的提高,叶片净光合速率、蒸腾速率和气孔导度的增幅相似。各处理净光合速率均高于对照,以100mg/L处理净光合速率最高,为9.49μmol/(m^2·s);胞间二氧化碳浓度随多效唑浓度增大而增大;光饱和点与光补偿点均随着多效唑浓度增高而降低,除50mg/L处理光饱和点[1 000.80μmol/(m^2·s)]高于对照外,其他处理均较对照低;所有处理光补偿点均较对照低;各处理太子参的产量均较对照高,以150mg/L处理的产量最高,为399.8kg/667m^2。
In order to promote high-yield cultivation of R. pseudostellariae, a single-factor field experiment was conducted to explore the effects of foliar spraying various concentrations of paelobutrazol on photosynthetic characteristics and yield of R. pseudostellariae. Results： Foliage dressing of paclobutrazol played a role in increasing chlorophyll content of R. pseudostellariae. Chlorophyll a and chlorophyll b increased with paclobutrazol concentration increasing. Paelobutrazol promoted the leaf net photosynthetic rate and transpiration rate, stomatal conductance as well as increased the content of intercellular carbon dioxide. The rise of leaf net photosynthetic rate, transpiration rate and stomatal conductance was similar. All net photosynthetic rate exceeds the control among which the one with 100 mg/L did the best in net photosynthetic rate, which was 9.49 μmol/（m^2·s）. The concentration of intercellular carbon dioxide is directly proportional to paclobutrazol concentration. While the light saturation point and light compensation point were inversely proportional to paclobutrazol concentration. The light saturation point with 50mg/L, which was 1 000.80μmol/（m^2·s）, was higher than the control while others were below. Results showed that all the light compensation points were below the control while all the yields of R. pseudostellariae were higher than the control among which the one with 150 mg/ L was the highest, which was 399.8 kg/667m^2.
出处
《贵州农业科学》
CAS
2017年第2期142-145,共4页
Guizhou Agricultural Sciences
基金
国家自然科学基金项目"太子参块根膨大规律及生理调控机制研究"(31260305)
贵州省组织部人才基地项目"贵州省药用植物繁育与种植人才基地建设"[黔人领发(2013)15]
贵州省作物学省级重点学科建设计划项目[黔学位合字ZDXK(2014)8]
贵州省普通高等学校粮油作物遗传改良与生理生态特色重点实验室资助项目[黔教合KY字(2015)333]
关键词
太子参
多效唑
叶面施肥
光合作用
光合特性
产量
Radizc pseudostellariae
paclobutrazol
foliage dressing
photosynthesis
photosynthetic trait
yield
