Abstract:

To explore the regulation effect of fertilization on dry matter accumulation, distribution and yield of hulless barley, taking ‘Zangqing 27’, ‘QTB13’ and ‘QTB25’ as experimental materials, we analyzed the change rules of dry matter accumulation, distribution and yield of these varieties under different fertilization treatments. The results showed that: the increase of fertilization promoted dry matter accumulation from tillering to maturity stage and the distribution of dry matter to vegetative organs and grains at flowering and maturity stage; and improved the transport of pre-flower nutrition organs stored assimilates and the contribution rate to grain, decreased the post-flower assimilates allocation to grain and the contribution rate to grain; the F₂ was conducive to accumulate the dry matter and allocate to vegetative organs and grains of ‘QTB13’ and ‘QTB25’, while had the highest post-flower assimilates allocation to grain and yield of ‘QTB13’ and ‘QTB25’; the F₃ was conducive to accumulate the dry matter and allocate to vegetative organs and grains, while had the highest post-flower assimilates allocation to grain, and the contribution rate and yield of ‘Zangqing27’. The study indicates that appropriate fertilization is beneficial to the accumulation, distribution of dry matter and can improve the yield of hulless barley.

Key words: fertilization, spring hulless barley, dry matter, accumulation and distribution, grain yield