Soil Inoculum Potential and Arbuscular Mycorrhizal Colonization of Acer rubrum in Forested and Developed Landscapes

P. Eric Wiseman; Christina Wells

doi:10.48044/jauf.2005.038

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Figure 1.
AMF colonization observed (a) in red maple fine roots collected at forest and landscape sites, and (b) in corn fine roots grown in sand amended with soil from forest and landscape sites. Error bars depict standard error of the mean (n = 9).***Site type means significantly different (P < 0.01).
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Table 1.

Chemical properties of soil collected from native forest and landscape sites. Standard errors of the means are shown in parentheses (n = 9). Asterisks denote statistical significance of differences in site type means for each soil property.

Property	Forest		Landscape
pH	4.9	(0.1)	5.6	(0.1)^***
NO₃-N (ppm)	1.50	(0.20)	2.60	(0.69)
K (ppm)	40.60	(5.80)	55.80	(2.87)^*
Ca (ppm)	97.50	(7.44)	258.80	(41.65)^**
Mg (ppm)	23.70	(2.70)	47.00	(5.93)^**
Zn (ppm)	1.10	(0.16)	2.30	(0.67)
Mn (ppm)	9.10	(1.10)	12.50	(1.36)
Cu (ppm)	0.56	(0.06)	0.82	(0.09)^**
B (ppm)	0.20	(0.02)	0.15	(0.01)^*
CEC (meq/100 g)	5.70	(0.24)	4.50	(0.24)^**
Acidity (meq/100 g)	4.80	(0.22)	2.40	(0.20)^***

↵*** P < 0.01;
↵** P < 0.05;
↵* P < 0.1

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Table 2.

Foliar nutrient levels of red maples growing on forest and landscape sites. Standard errors of the means are shown in parentheses (n = 9). Asterisks denote statistical significance of differences in site type means for each soil property.

Nutrient	Forest		Landscape		Sufficiency^{^z}
N (%)	1.74	(0.04)	1.51	(0.06)^**	1.60–2.20
P (%)	0.12	(0.01)	0.13	(0.01)	0.18–0.30
K (%)	0.85	(0.06)	0.81	(0.04)	0.50–0.80
Ca (%)	0.84	(0.05)	0.71	(0.05)*	2.00–3.00
Mg (%)	0.21	(0.01)	0.20	(0.01)	0.26–0.40
S (%)	0.11	(0.01)	0.11	(0.01)	0.17–0.30
Zn (ppm)	35.10	(2.74)	34.40	(2.01)	20–50
Mn (ppm)	1086.10	(122.51)	816.90	(97.14)^*	50–200
Cu (ppm)	7.50	(0.46)	8.10	(1.02)	6–20
Fe (ppm)	74.80	(4.81)	110.60	(17.41)	60–300

↵^z Sufficiency ranges provided by A&L Eastern Agricultural Laboratories, Inc., Richmond, VA.
***P < 0.01;
↵**P < 0.05;
↵*< 0.1

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Table 3.
Correlations among red maple AMF colonization, corn bioassay colonization, soil chemical properties, and foliar P levels. Numerical values are Pearson correlation coefficients. Asterisks following coefficients denote statistical significance. Data from all trees at all sites are combined (n = 54).
BAMF^{^y} Soil pH CEC Soil acidity Soil P Foliar P
MAMF^{^z} −0.018 −0.418^*** 0.584^*** 0.637^*** −0.153 −0.229^*
↵^z Maple AMF colonization.
↵^y Bioassay AMF colonization.
↵***P < 0.01;
**P < 0.05;
↵*P < 0.1