摘要
为了明确耐密植大豆与常规大豆抗旱能力的差异,以耐密植大豆品种垦丰16与常规品种合丰35为试材,设置正常水分管理、轻度干旱胁迫和重度干旱胁迫3个水平,于R2期和R6期进行水分处理,对其光合生理指标进行测定。结果表明:随着干旱胁迫的加强单株叶面积和净光合速率均呈下降趋势,并且与对照差异均达到了显著或极显著水平;叶色值也呈下降趋势,2个时期干旱处理耐密植品种垦丰16叶色值与对照差异均不显著,轻度干旱处理,常规品种合丰35与对照不显著,重度干旱处理则达到极著水平;单株粒重也呈下降趋势,只有R2期耐密植品种垦丰16轻度干旱条件下与对照差异不显著,2个时期其它处理与对照差异均达到极显著水平。随着干旱胁迫的加强耐密植品种垦丰16的单株叶面积、叶色值、净光合速率和单株粒重等指标下降较少,而常规品种合丰35下降较多,可见耐密植品种垦丰16的抗旱能力强于普通品种合丰35。
In order to define the difference of the drought resistance ability between dense planting resistance soybean and conventional soybean,taking dense planting resistance soybean Kenfeng 16 and conventional soybean variety Hefeng 35 as test materials, set up three water treatments in R2 and R6 stages as normal water management,mild drought stress and severe drought stress,its photosynthetic physiological indexes were measured . The results showed that the leaf area per plant and net photosynthetic rate were on a declining trend with the strengthening of drought stress,and reached significant or extremely significant difference compared with CK;leaf color values was on a declining trend too, and its differences of dense planting resistant varieties Kenfeng 16 and CK were not significant in drought condition in two stages,the differences between conventional variety Hefeng 35 and CK were not significant in the mild drought condition, and reached extremely significant level in severe drought condition; the grain weight per plant was on a declining trend too. Only in the R2 stage,the difference between dense planting resistant variety Kenfeng 16 and CK was not significant in mild drought condition, and other treatments reached extremely significant difference compared with CK in the two stages. Leaf area per plant,leaf color value, net photosynthetic rate and grain weight per plant of dense planting resistant variety Kenfeng 16 declined less with the strengthening of drought stress, and conventional variety Hefeng 35 declined more. It could be seen that the drought-resistant ability of dense planting resistant variety Kenfeng 16 was stronger than the ordinary variety Hefeng 35.
出处
《黑龙江农业科学》
2015年第6期23-26,共4页
Heilongjiang Agricultural Sciences
基金
黑龙江省大豆产业振兴院士工作站资助项目(2013YGZ02-1)
国家科技支撑计划资助项目(2011B AD35B06)
国家科技支撑计划资助项目(2011DFR30840)
国家863计划资助项目(2011AA10A105)
国家现代大豆产业技术体系资助项目(CARS-04-CES05)
关键词
耐密植
干旱胁迫
光合特性
抗旱能力
dense planting resistant
drought stress
photosynthetic characteristics
drought resistant ability
