摘要
以百农矮抗58小麦为材料,采用大田试验的方法,研究了始穗期喷施不同浓度(0,10、30、50 mg·L-1)的5-氨基乙酰丙酸(ALA)对冬小麦花后干物质生产和旗叶衰老的影响.结果表明:10～50 mg·L-1 ALA处理有利于植株对干物质的积累,至成熟期其干物质总量明显高于对照(0 mg·L-1);10～50 mg·L-1 ALA处理各器官干物质的分配率与对照没有显著性差异,但其花后生产的干物质对产量的贡献率显著高于对照;在开花期,10～50 mg·L-1ALA处理的叶面积指数与对照没有显著性差异,但在乳熟期和腊熟期,叶面积指数显著高于对照.从开花期至蜡熟期,10～50 mg·L-1 ALA处理的旗叶SPAD值和净光合速率均高于对照;在灌浆后期,ALA处理降低了旗叶丙二醛(MDA)含量和相对电导率.与对照相比,10～50mg·L-1 ALA处理冬小麦的穗粒数、千粒重和产量显著增加,其中以30 mg·L-1 ALA处理增产效果最大.
Taking wheat cultivar Bainong AK58 as test material,a field experiment was conducted to study the effects of different concentration 5-aminolevulinic acid（ALA）（0,10,30 and 50 mg·L-1） applied at initial heading stage on the post-anthesis dry matter accumulation and flag leaf senescence of the cultivar.Applying 10-50 mg·L-1 of ALA benefited the dry matter accumulation,with its total amount at maturing stage being significantly higher than that of the control（0 mg·L-1 ALA）.10-50 mg·L-1 of ALA had no significant effects on the distribution of accumulated dry matter in leaf,stem and sheath,and grain,but increased the contribution of the dry matter to grain yield.10-50 mg·L-1 of ALA increased the leaf area index at milky and dough stages,but had no effects on it at flowering stage.After treated with 10-50 mg·L-1 ALA,the leaf SPAD value and net photosynthetic rate from anthesis to milky stage were significantly higher,and the MDA content and relative electric conductivity at later grain-filling stage were lower,compared with those of the control.Applying 10-50 mg·L-1 of ALA increased the grain number per spike,1000-grain mass,and grain yield significantly,with the best effect when applying 30 mg·L-1 ALA.
出处
《应用生态学报》
CAS
CSCD
北大核心
2011年第2期383-388,共6页
Chinese Journal of Applied Ecology
基金
河南省教育厅自然科学研究计划项目(2007210007)
河南省重大科技专项(081100110200)资助
关键词
ALA
冬小麦
干物质积累
叶面积指数
生理特性
籽粒产量
5-aminolevulinic acid
winter wheat
dry matter accumulation
leaf area index
physiological characteristics
grain yield.
