Technical highlights - Department of Primary Industries ...

Table 23.1 Two-way analysis of variance (ANOVA) summary results of soil physicochemical properties in patches infested with and patches not
infested with cat’s claw creeper across six sites in the Brisbane – Gold Coast region
Summary ANOVA Group mean a (± SE b )
Soil trait Site Invasion Site × invasion Infested Uninfested
Air dry moisture (%) p ≤ 0.001 p ≤ 0.01 NS c 3.16 ± 0.28 2.54 ± 0.23
Soil macronutrients
Organic carbon (%) p ≤ 0.001 p ≤ 0.01 NS 4.09 ± 0.34 3.48 ± 0.28
Total carbon (%) p ≤ 0.001 p ≤ 0.001 NS 4.74 ± 0.36 3.99 ± 0.28
Total nitrogen (%) p ≤ 0.001 p ≤ 0.001 NS 0.35 ± 0.03 0.28 ± 0.02
Exchangeable ions and micronutrients
Nitrate nitrogen (mg kg –1 ) p ≤ 0.001 NS NS 17.71 ± 2.10 15.17 ± 1.30
Nitrate ammonia (mg kg –1 ) p ≤ 0.001 NS p ≤ 0.05 3.10 ± 0.50 3.40 ± 0.59
Phosphorus (mg kg –1 ) p ≤ 0.001 NS NS 29.38 ± 3.77 28.42 ± 5.06
Potassium (meq 100 g –1 ) p ≤ 0.001 NS NS 0.73 ± 0.07 0.62 ± 0.08
Calcium (meg 100 g –1 ) p ≤ 0.001 p ≤ 0.05 NS 15.69 ± 2.04 12.03 ± 1.79
Exchangeable sodium (meq 100 g –1 ) p ≤ 0.001 p ≤ 0.01 NS 0.05 ± 0.01 0.09 ± 0.02
Total sodium (meq 100 g –1 ) p ≤ 0.001 NS NS 0.11 ± 0.02 0.14 ± 0.02
Magnesium (meq 100 g –1 ) p ≤ 0.001 p ≤ 0.10 NS 5.55 ± 0.55 4.74 ± 0.59
Copper (mg kg –1 ) p ≤ 0.001 NS NS 1.29 ± 0.21 1.35 ± 0.23
Iron (mg kg –1 ) p ≤ 0.001 p ≤ 0.10 NS 87.10 ± 10.12 109.64 ± 10.12
Manganese (mg kg –1 ) p ≤ 0.001 NS NS 42.52 ± 7.42 41.46 ± 6.90
Zinc (mg kg –1 ) p ≤ 0.01 NS NS 4.27 ± 1.12 3.47 ± 1.15
Sulfur (mg kg –1 ) p ≤ 0.001 p ≤ 0.10 NS 12.54 ± 1.11 10.62 ± 1.37
Chemical characteristics
pH p ≤ 0.001 p ≤ 0.01 NS 6.23 ± 0.14 5.90 ± 0.14
Electrical conductivity (dS m –1 ) p ≤ 0.001 p ≤ 0.001 NS 0.10 ± 0.01 0.07 ± 0.01
Chloride (mg kg –1 )
Soil texture
p ≤ 0.01 p ≤ 0.01 p ≤ 0.10 24.96 ± 0.78 18.60 ± 2.58
Coarse sand (%) p ≤ 0.001 NS NS 23.83 ± 1.99 24.42 ± 2.41
Fine sand (%) p ≤ 0.001 NS NS 33.96 ± 2.14 35.58 ± 1.84
Silt (%) p ≤ 0.001 NS NS 19.50 ± 1.48 20.08 ± 1.75
Clay (%) p ≤ 0.001 NS NS 25.83 ± 1.68 23.83 ± 1.46
a Group means have been pooled across two habitats (riparian and non-riparian) and six survey sites.
b SE = standard error.
c NS = not significant.
52 Technical highlights: research projects 2010–11