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New Zealand Journal of Forestry Science

Table 3 Allometric relationships between RCD and total root length, and total root biomass for roots > 1 mm and > 2 mm diameter

From: Biomass and root attributes of eight of New Zealand’s most common indigenous evergreen conifer and broadleaved forest species during the first 5 years of establishment

Species

Root size class

Root length

Root biomass

  

r 2

P

Equation

r 2

P

Equation

Agathis australis (kauri)

> 1 mm

0.780

< 0.001

y = 0.542 exp (0.113x)

0.879

< 0.001

y = 1.173 exp (0.137x)

> 2 mm

0.758

< 0.001

y = 0.161 exp (0.127x)

0.860

< 0.001

y = 0.879 exp (0.144x)

Alectryon excelsus (titoki)

> 1 mm

0.797

< 0.001

y = 8.179 exp (0.057x)

0.851

< 0.001

y = 17.629 exp (0.062x)

> 2 mm

0.763

< 0.001

y = 1.842 exp (0.057x)

0.851

< 0.001

y = 11.206 exp (0.066x)

Dacrycarpus dacrydioide (kahikatea)

> 1 mm

0.783

< 0.001

y = 12.159 exp (0.045x)

0.891

< 0.001

y = 12.816 exp (0.053x)

> 2 mm

0.704

< 0.001

y = 3.090 exp (0.047x)

0.897

< 0.001

y = 8.136 exp (0.057x)

Dacrydium cupressinum (rimu)

> 1 mm

0.816

< 0.001

y = 2.743 exp (0.080x)

0.925

< 0.001

y = 3.514 exp (0.098x)

> 2 mm

0.829

< 0.001

y = 0.527 exp (0.088x)

0.946

< 0.001

y = 1.793 exp (0.106x)

Podocarpus totara (totara)

> 1 mm

0.461

< 0.001

y = 11.481 exp (0.040x)

0.730

< 0.001

y = 15.073 exp (0.049x)

> 2 mm

0.659

< 0.001

y = 1.921 exp (0.046x)

0.780

< 0.001

y = 8.786 exp (0.053x)

Prumnopitys ferruginea (miro)

> 1 mm

0.831

< 0.001

y = 2.731 exp (0.095x)

0.909

< 0.001

y = 3.627 exp (0.114x)

> 2 mm

0.855

< 0.001

y = 0.357 exp (0.112x)

0.931

< 0.001

y = 1.673 exp (0.127x)

Prumnopitus taxifolia (matai)

> 1 mm

0.779

< 0.001

y = 2.699 exp (0.101x)

0.789

< 0.001

y = 4.321 exp (0.102x)

> 2 mm

0.515

< 0.001

y = 0.359 exp (0.124x)

0.808

< 0.001

y = 2.204 exp (0.111x)

Vitex lucens (puriri)

> 1 mm

0.812

< 0.001

y = 13.037 exp (0.037x)

0.886

< 0.001

y = 25.990 exp (0.038x)

> 2 mm

0.723

< 0.001

y = 4.002 exp (0.033x)

0.878

< 0.001

y = 21.548 exp (0.038x)

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