湖北林业科技

Abstracts:The study was carried out to seedling strengthening experiment for Quercus nuttallii.In this trial,completely randomized block design.1-year-old seedlings of Q.nuttallii provenances were observed and investigated in 30 seedlings per replicate, with 3 replicates,90 seedlings in total.Investigation indicators include seedling height and ground diameter.The results showed as follows: The optimum formula of matrix for container nursery of Q. nuttallii was peat soil∶yellow subsoil∶Ca-Mg-P fertilizer=60∶35∶5.After spraying GGR6 on Q. nuttallii seeding leaves in field with different concentrations,there were significant differences in number of Grade I lateral root with length larger than 5cm,seedling height growth and ground diameter growth.The measure of spraying 100mg/L GGR6 on leaves could be taken, which could increase 60% of the number of Grade I lateral root with length larger than 5cm,20% of seedling height growth,15% of ground diameter growth by comparing with the control.