摘要： 为阐明源、库的关系对甜菜产量形成的影响。运用比较生理学的方法,研究了不同特性甜菜品种群体源、库的形成及其相互关系以及源、库发展在产量形成中的作用。结果表明,甜菜群体LAI和LAD可作为衡量源大小及能力的重要指标。光合源的同化能力直接影响着块根库容的大小,后期较大的光合源会抑制块根库的扩大,影响甜菜产量的形成。揭示了丰产、高糖甜菜品种的源库关系,LAI峰值出现在块根及糖分增长期,最大LAI应在4.3以上,达到峰值后要有20 d左右的相对稳定持续期,糖分积累后期LAI应保持在2.4左右。群体LAD应在块根及糖分增长期达到19.3 m2.d以上,后期呈缓慢下降变化。以上结果可为指导甜菜生产实践提高产量提供理论依据。

关键词: 甜菜, 群体, 源库关系, 产量, 含糖量

Abstract: The experiment was carried out by the method of comparative physiology,which was conducted to study on the formation of the population and correlation of the source-sink in different variety sugar beet,and the infection of the development of source-sink on the yield formation.The results showed that LAI and LAD of the sugar beet could be used as the important index of distinguish the size and capacity of the source.The assimilation capability of LAD could influence the potential of the sink of the earthnut straightly,the larger LAD could restrains the expands of the earthnut in the evening and even influences the formation of the yield and quantity of the sugar beet.It indicates the connection of fertility sugar beet with high sugar beet at the moment.The peak value of LAI present at the root and sugar increasing stage.The highest LAI should over 4.3.If it reaches the highest peak,it could keep at the comparatively steady persistent period about 20 days.And the LAI should keep at about 2.4 in the evening of sugar content accumulated stage.The colony LAD should arrive at above 19.3 m²·d in the root and sugar increasing stage,then it presents decline slowness in the end.The results above can offer the theoretic gist for directing improving the sugar beet′s producing quality-yield practice.

Key words: Sugar beet( Beta vulgaris L.), Population, Source-sink relationship, Yield, Sugar content

中图分类号: 

• S5.3