Abstract: For the further promotion of vegetative growth and effective fertilization in grape seedlings,taking the one-year-old potted Jumeigui grape seedlings as tested materials,using ¹⁵N tracer technique to study the effects of different fertilization methods (foliar fertilization and soil fertilization) on ¹⁵N-urea absorption,distribution and utilization.The whole plants were dissected 3 times to leaves,shoots,trunk and roots in mature stage of new shoots.The results showed that fertilizer was beneficial to shoot and leaf growth,and foliar fertilization had remarkable influences on total nitrogen of grape leaves on September 30.The Ndff values of different organs under different fertilization methods were different at the mature stage of new shoots.Ndff values in all organs under foliar fertilization treatment were significantly higher than those under soil fertilization treatment on September 10.On September 30,Ndff values of shoots reached to 10.03% when daubing on the leaves,which was higher than that when applying in soil (5.61%).The distribution ratios of ¹⁵N in leaves under foliar fertilization treatment were higher than those under soil fertilization treatment in three different period,which showed that foliar fertilization was beneficial to the absorption of nitrogen in leaves.¹⁵N utilization rate of daubing on the leaves were significantly higher than those of applying in soil on August 20 and September 10.On September 30,there was no significant difference of distribution ratios of ¹⁵N in different organs between two fertilizer manners,as well as the ¹⁵N utilization rate,and the difference of Ndff values in different organs reduced between two fertilizer manners.The foliar fertilization is beneficial to raise the ¹⁵N utilization rate in grape seedlings,and promote the vegetable growth.

Key words: Jumeigui grape, Foliar fertilization, ¹⁵N, Distribution, Utilization

CLC Number: 

• S143

• S663.1