磷素水平对甜菜干物质积累与分配的影响

The Affection of Phosphorus Amount to Sugarbeet Dry Matter Accumulation and Distribution

甜菜植株干物质积累量与施磷量呈正相关 ,r =0 .895 。提高施磷量能增加甜菜各器官干物质积累量 ,但施磷量超过P1 2 0 时再增磷则处理间块根增长幅度减少。在生育前期增磷能提高干物质向根部的分配率 ,促进根系发育 ,有利于以后叶。

There is a positive correlation between Phosphorus amount and sugarbeet plant dry matter′s accumulative amounts,r=0.895 .As we increase phsphorus amounts,the dry matter accumulative amounts in all sugarbeet organs can be increased,but if the phosphorus amount is more than P 120 ,the sugarbeet root increase range is less than before even if we go on to increase phosphorus amounts.In early growth period,increasing phosphorus can increase the distribution rate of dry matter to root,and promote the development of root system,good for the growth of leaves and roots in future.