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Silvicultural Techniques：
Trees planted at a spacing of 4m by 6m. Planting pits are dug according to the size of seedlings and an appropriate amount of base fertilizer is applied into the pits. Root system should be well maintained during lifting in the nursery. The length of the root system should be longer than 15 cm. Lateral and terminal branches and poor roots can be pruned as appropriate. The root system should be kept moist. Seedlings should be planted as soon as possible after lifting from nursery， no later than three days. Trees were irrigated immediately after planting. When buds appear， remove unnecessary ones to ensure a straight and round stem. The seedlings should not be planted near plants of mulberry family.
Suitable Areas for Planting：
Beijing， Tianjin， Hebei， Shandong， Central and southern part of Gansu Province and other areas with similar environmental conditions.
Tower-formed Chinese white poplar CV-BJHRO4
Species： Populus tomentosa
Scientific Name： Populus tomentosa ‘BJHR04’
Category： Clone
Certification： Certified
Registration code： GUO-S-SC-PT-004-2006
Characteristics：
Male trees， abortive anthers， no flying catkins. Average height 22.96m， average DBH 32.18cm and average individual volume 0.7604m3 at 19 year-old in Beijing area， the volume is 2.16 times of the control （Chinese white poplar in Yi County）. Wood basic density 0.381g/ cm3， fiber length 1，464μm. The wood is white with straight grains. No moist heart wood， wood turning does not cause rough surface. Up to 19 year-old， basically no blister canker occurred. Trees are strongly resistant to leaf rust and leaf spot diseases and suitable for ornamental plantings in urban areas.
Silvicultural Techniques：
Trees planted at a spacing of 4m by 6m. Planting pits are dug according to the size of seedlings and an appropriate amount of base fertilizer is applied into the pits. Root system should be well maintained during lifting in the nursery. The length of the root system should be longer than 15 cm. Lateral and terminal branches and poor roots can be pruned as appropriate. The root system should be kept moist. Seedlings should be planted as soon as possible after lifting from nursery， no later than three days. Trees were irrigated immediately after planting. When buds appear， remove unnecessary ones to ensure a straight and round stem. The seedlings should not be planted near plants of mulberry family.
Suitable Areas for Planting：
Beijing， Tianjin， Hebei， Shandong， the middle and southern part of Gansu Province and other areas with similar environmental conditions.
Tower-formed Chinese white poplar CV-BJHRO6
Species： Populus tomentosa
Scientific Name： Populus tomentosa ‘BJHR06’
Category： Clone
Certification： Certified
Registration code： GUO-S-SC-PT-005-2006
Characteristics：
Male trees， abortive anthers， no flying catkins. Average height 23.3m， average DBH 27.5cm and average individual volume 0.5637m3 at 19 year-old in Beijing area， the volume is 1.6 times of the control （Chinese white poplar in Yi County）. Wood basic density 0.371g/ cm3， fiber length 1，394μm. The wood is white with straight grains. No moist heart wood， wood turning does not cause rough surface. Up to 19 year-old， basically no blister canker occurred. Trees are strongly resistant to leaf rust and leaf spot diseases and suitable for ornamental plantings in urban areas.
Silvicultural Techniques：
Trees planted at a spacing of 4m by 6m. Planting pits are dug according to the size of seedlings and an appropriate amount of base fertilizer is applied into the pits. Root system should be well maintained during lifting in the nursery. The length of the root system should be longer than 15 cm. Lateral and terminal branches and poor roots can be pruned as appropriate. The root system should be kept moist. Seedlings should be planted as soon as possible after lifting from nursery， no later than three days. Trees were irrigated immediately after planting. When buds appear， remove unnecessary ones to ensure a straight and round stem. The seedlings should not be planted near plants of mulberry family.
Suitable Areas for Planting：
Beijing， Tianjin， Hebei， Shandong， Central and southern part of Gansu Province and other areas with similar environmental conditions.
Tower-formed Chinese white poplar CV-BJHRO7
Species： Populus tomentosa
Scientific Name： Populus tomentosa ‘BJHR07’
Category： Clone
Certification： Certified
Registration code： GUO-S-SC-PT-006-2006
Characteristics：
Male trees， abortive anthers， no flying catkins. Average height 21.2m， average DBH 28.12cm and average volume 0.5468m3 at 19 year-old in Beijing area， the volume is 1.56 times of the control （Chinese white poplar in Yi County）. Wood basic density 0.380g/ cm3， fiber length 1，489μm. The wood is white with straight grains. No moist heart wood， wood turning does not cause rough surface. Up to 19 year-old， basically no blister canker occurred. Trees are strongly resistant to leaf rust and leaf spot diseases and suitable for ornamental plantings in urban areas.
Silvicultural Techniques：
Trees planted at a spacing of 4m by 6m. Planting pits are dug according to the size of seedlings and an appropriate amount of base fertilizer is applied into the pits. Root system should be well maintained during lifting in the nursery. The length of the root system should be longer than 15 cm. Lateral and terminal branches and poor roots can be pruned as appropriate. The root system should be kept moist. Seedlings should be planted as soon as possible after lifting from nursery， no later than three days. Trees were irrigated immediately after planting. When buds appear， remove unnecessary ones to ensure a straight and round stem. The seedlings should not be planted near plants of mulberry family.
Suitable Areas for Planting：
Beijing， Tianjin， Hebei， Shandong， Central and southern part of Gansu Province and other areas with similar environmental conditions.
Conic stem-formed Chinese white poplar CV-BJHRO9
Species： Populus tomentosa
Scientific Name： Populus tomentosa ‘BJHR09’
Category： Clone
Certification： Certified
Registration code： GUO-S-SC-PT-007-2006
Characteristics：
Male trees， abortive anthers， no flying catkins. Average height 23.04m， average DBH 35.72cm and average volume 0.9125m3 at 19 year-old in Beijing area， the volume is 2.59 times of the control （Chinese white poplar in Yi County）. Wood basic density 0.462g/cm3， fiber length 1，095μm. The wood is white with straight grains. No moist heart wood， wood turning does not cause rough surface. Up to 19 year-old， basically no blister canker occurred. Trees are strongly resistant to leaf rust and leaf spot diseases and suitable for ornamental plantings in urban areas.
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