Effects of Soil Properties on Pb, Cd, and Cu Contents in Tobacco Leaves of Longyan, China, and Their Prediction Models

Table 4

Correlation between heavy metals and other items in tobacco and soils.

		Soil								Tobacco
		pH	N	P	K	OM	Pb	Cd	Cu	Pb	Cd	Cu
Soil	pH	1.00	−0.075	−0.187	−0.058	−0.123	−0.187	−0.025	0.044	−0.301	−0.031	0.079
	N	−0.075	1.00	−0.063	0.022	0.164	0.168	0.032	0.121	0.331	0.058	0.090
	P	−0.180	−0.063	1.00	0.202	−0.022	0.020	0.094	−0.203	0.094	0.086	−0.538
	K	−0.058	0.022	0.202	1.00	−0.021	0.031	0.035	−0.163	0.164	0.077	−0.289
	OM	−0.123	0.164	−0.022	−0.021	1.00	0.091	0.075	0.100	0.087	0.161	0.040
	Pb	−0.187	0.168	0.020	0.031	0.091	1.00	0.008	0.154	0.671	0.023	0.044
	Cd	−0.031	0.032	0.094	0.035	0.075	0.008	1.00	−0.200	0.030	0.877	−0.093
	Cu	−0.044	0.121	−0.203	−0.163	0.099	0.154	−0.200	1.00	0.032	−0.182	0.614
Tobacco	Pb	−0.301	0.331	0.085	0.164	0.087	0.671	0.030	0.033	1.00	0.052	−0.033
	Cd	−0.025	0.058	0.086	0.077	0.161	0.023	0.877	−0.182	0.052	1.00	−0.060
	Cu	0.079	0.090	−0.538	−0.289	0.044	0.040	−0.093	0.614	−0.033	−0.060	1.00

Note. significant at 0.01 level; OM stands for organic matter.