Impact of management on nutrients, carbon, and energy in aboveground biomass components of mid-rotation loblolly pine (Pinus taeda L.) plantations

Table 4 The p value of the main effects of cultural intensity and planting density and their interactions on the contents of energy, C, N, P, K, Ca and Mg, and C:N ratio among components in loblolly pine plantations at age 12 (using the significance level of 0.05)

Type	Effect	Energy	C	N	C:N	P	K	Ca	Mg
Stem-wood	Culture	0.018	0.030	0.057	0.061	0.012	0.084	0.026	0.004
	Density	<0.001	<0.001	0.380	0.044	0.017	0.007	0.001	<0.001
	Culture × density	0.320	0.300	0.647	0.690	0.989	0.551	0.872	0.219
Bark	Culture	0.004	0.005	0.033	0.048	0.244	0.308	0.101	0.227
	Density	<0.001	<0.001	0.712	0.051	0.087	0.031	<0.001	0.016
	Culture × density	0.034	0.047	0.471	0.911	0.389	0.417	0.030	0.324
Branch	Culture	0.031	0.031	0.232	0.303	0.122	0.188	0.108	0.044
	Density	<0.001	<0.001	0.224	0.379	<0.001	<0.001	0.017	<0.001
	Culture × density	0.801	0.769	0.935	0.997	0.979	0.938	0.818	0.983
Foliage	Culture	0.302	0.370	0.129	0.041	0.842	0.652	0.514	0.114
	Density	0.339	0.308	0.194	0.519	0.338	0.156	0.009	0.197
	Culture × density	0.728	0.675	0.736	0.325	0.679	0.087	0.469	0.890
Total	Culture	0.008	0.014	0.024	0.210	0.029	0.082	0.054	0.012
	Density	<0.001	<0.001	0.079	0.001	0.308	0.033	0.002	0.012
	Culture × density	0.205	0.213	0.569	0.808	1.000	0.416	0.885	0.663

ISSN: 1297-966X