Poplar Demonstration - watch out for it!
Posted on February 12, 2020
The purpose: to show the features of different hybrid poplar clones being bred in New Zealand for soil stabilisation, shelter, shade, riverbank protection, timber, and carbon credits.
The location: signposted on State Highway 1 between Utiku and Taihape. The site is ~ 100 m from the road in clear view. Look out for it on your travels.
Plates 1-4. Views of the sign and planted poplars. Rows run up the hill.
Establishment: Poles (3 m) were planted using an augur, and protected with Dynex sleeves. Cattle were excluded with a solar-powered electric 2 wire fence. The poplar trees were planted in winter 2017 in rows extending up the slope, one clone per row, with spacing between rows of 10 m and within rows of 7 m.
The hybrid poplar clones:
Table 1. The 16 clones (cultivars) listed below in the demonstration. Rows are numbered south to north.
|Row (S to N)||Clone||Name||Number|
|1||NZ5026||P. deltoides x ciliata ‘Rotorangi’||7|
|2||07-06-007||P. trichocarpa x nigra Blanc de Garonne||10|
|3||07-04-005||P. trichocarpa x nigra Vert de Garonne||10|
|4||NZ5006||P. deltoides × yunnanensis ‘Kawa’||10|
|5||PN870||P. ×euramericana ‘Veronese’||10|
|6||NZ5020||P. ×euramericana ‘Otahuao’||10|
|7||NZ5032||P. nigra x maximowiczii ‘Shinsei’||10|
|8||NZ5036||P. maximowiczii x nigra ‘Pecam’||10|
|9||NZ5035||P. maximowiczii x nigra ‘Mapiu’||10|
|10||NZ5007||P xeuramericana x yunnanensis ‘Toa’||10|
|11||NZ5017||P. ×euramericana ‘Fraser’||10|
|12||NZ5018||P. ×euramericana ‘Weraiti’||10|
|13||NZ5025||P. deltoides x ciliata ‘Kaimai’||10|
|14||07-05-103||P. maximowiczii × trichocarpa||10|
|15||07-02-086||P. maximowiczii × trichocarpa||10|
|16||NZ5010||P. xeuramericana x nigra ‘Crowsnest’||10|
2019 Dead trees were replaced
2020 Trees are pruned to a single leader
Figure 1. Mean height of the 16 poplar clones in year 1 (2018) and year 2 (2019)
Figure 2. Mean tree diameter in cm in year 2 measured at the top of the protective sleeve
See the photos at age 2 years.