What quality indicators must pear nursery stock meet when leaving the nursery?
Pear nursery stock grading indicators Grade Item Grade 1 Grade 2 Cultivar and rootstock type Pure and true Roots Number of lateral roots More than 4 More than 3 Main root length More than 10 cm Lateral root length Not shorter than 15 cm, spreading Stem Rootstock stem section length Less than 10 cm Height More than 130 cm More than 100 cm Thickness (at 5-10 cm above ground) More than 1.2 cm More than 1 cm Rootstock treatment The rootstock stub must be cut off, the rootstock has no injury Union healing degree Completely healed Number of plump buds within the shaping zone More than 6 Note: Annual nursery stock yield per hectare below 150,000 plants. In the Beijing area, the pear rootstock should be Pyrus betulifolia or Pyrus ussuriensis.
Pear nursery stock grading indicators Grade Item Grade 1 Grade 2 Cultivar and rootstock type Pure and true Roots Number of lateral roots More than 4 More than 3 Main root length More than 10 cm Lateral root length Not shorter than 15 cm, spreading Stem Rootstock stem section length Less than 10 cm Height More than 130 cm More than 100 cm Thickness (at 5-10 cm above ground) More than 1.2 cm More than 1 cm Rootstock treatment The rootstock stub must be cut off, the rootstock has no injury Union healing degree Completely healed Number of plump buds within the shaping zone More than 6 Note: Annual nursery stock yield per hectare below 150,000 plants. In the Beijing area, the pear rootstock should be Pyrus betulifolia or Pyrus ussuriensis.