The Influences of Cleaning-Stubble Method and Moulding Thickness on the Shape and Yield of Green Asparagus

Using three-year Asparagus officinalis L.cv.Atlas as experimental materials,the influences of cleaning-stubble method and moulding thickness on the shape and yield of green asparagus were studied from March to June in the year 2007.The results showed that: the yield of qualified green asparagus done with digging stubble increased by 9.6%,while the yield of unqualified green asparagus also increased by 5.8%,the reason for digging stubble to improve the yield of green asparagus was that the digging stubble promoted the occurrence of tender stems.The suitable moulding thickness had obvious yield increasing effect,the reason for the yield increasing was that the moulding thickness made the asparagus stem wide and had the weight of per branch improve.With the increasing of moulding thickness,the ratio of bulk-scalp and bent asparagus increased,the first harvesting day delayed,the day yield of green asparagus was high.The suitable moulding thickness in the west Liaohe plain of the Inner Mongolia was 5～10 cm.