Extensionof Seedling-raising Duration Increases Yield and Quality of Paper Pot Sugar Beet(Beta Vulgaris L.)

In order to further improve sugar beet production,based on Japans successful experience,the extension of seedling-raising duration was carried out by different sowing dates.The results showed that early sowing and thus the extension of seedling-raising duration to 35-40 days,could increase sugar content by 0.1-0.4% and yield by 7.7% -13.9% respectively compared to 25 day-seedlings.The average yield is 57.5 t·hm^-2-60.7 t·hm^-2.40-day seedling has the greatest increase in root yield and sugar content.In a regular year,it is suggested in the central areas of Heilongjiang province,sugar beet sowing before April 8 can better display the potential yield increasing effect for paper pot sugar beet.