不同剂量氮离子注入对小麦生长发育及光合特性的影响

Effects of different N ion implantation doses on growth and development and characteristics of photosynthesis of wheat

以该地区主栽品种连麦7号和烟农19为试验材料,采用盆栽试验方法,研究不同剂量N+注入对2个小麦品种生长发育及旗叶光合特性的影响。结果表明:不同剂量N+注入,连麦7号和烟农19种子发芽率、苗高、株高、旗叶SPAD值及净光合速率等均呈下降趋势,且生育进程推迟;随着剂量的增加,N+注入对2个小麦品种的生长发育及光合特性的影响不断加大,其中N+注入对连麦7号的抑制作用要小于烟农19。而在灌浆后期,当N+注入剂量达到3×1016N+/cm2时,烟农19旗叶净光合速率显著降低;继续加大剂量到4×1016N+/cm2,连麦7号旗叶净光合速率开始显著下降。连麦7号对N+注入剂量的敏感度要小于烟农19。得出不同剂量N+注入会在一定程度上影响2个小麦品种的生长发育,进而影响高产的形成,且在品种间存在差异,其中连麦7号对于N+注入剂量的敏感度要小于烟农19。

The effects of N ion implantation doses on growth and development and characteristics of photosynthesis of the main cultivars wheat in the region(Lianmai 7 and Yannong 19)were investigated by pot planting experiment.The results indicated that different N ion implantation doses had different negative influences on germination,seedling height,plant height,SPAD readings and characteristics of flag leaf photosynthesis between Lianmai 7 and Yannong 19.In addition,growth process of the two kinds of wheat were delayed under these conditions.At increasing of doses,the effects of N ion implantation on growth and development and characteristics of photosynthesis of wheat were increased constantly,in which the inhibitory effects of N ion implantation on Lianmai 7 were less than on Yannong 19.When implanted with 3×1016 N+/cm2,the net photosynthesis rate of the flag leaf of Yannong 19 was significantly decreased during the late filling period,however the net photosynthesis rate of the flag leaf of Lianmai 7 significantly decreased at the 4×1016 N+/cm2 level.The above results showed that the sensitivity of N ion implantation dose in Lianmai 7 was lower than Yannong 19.It was concluded that different doses of N+implantation affect the growth and development of the two wheat varieties to a certain extent,thus affecting the formation of high yields,and there were differences among the varieties,among which the sensitivity of Lianmai 7 to N+implantation dose was lower than that of Yannong 19.