Growth response of container-grown red pine and black pine seedlings at different types of fertilization

Figures & data

Figure 1. Root collar diameter and height of red pine and black pine seedlings at various types of fertilization. The same letter on each bar (mean ± S.E.) within each treatment indicates no significant difference according to Tukey's test at P = 0.05. PD: Pinus densiflora, PT: Pinus thunbergii, UF: slow release solid fertilization, 0.3%: 0.3% foliar fertilization, VR: varying rates of foliar fertilization, C: control.

Figure 2. Dry mass of red pine and black pine seedlings at various types of fertilization. The same letter on each bar (mean ± S.E.) within each treatment indicates no significant difference according to Tukey's test at P = 0.05. PD: Pinus densiflora, PT: Pinus thunbergii, UF: slow release solid fertilization, 0.3%: 0.3% foliar fertilization, VR: varying rates of foliar fertilization, C: control.

Figure 3. Shoot/root ratio of red pine and black pine seedlings at various types of fertilization. The same letter on each bar (mean ± S.E.) within each treatment indicates no significant difference according to Tukey's test at P = 0.05. PD: Pinus densiflora, PT: Pinus thunbergii, UF: slow release solid fertilization, 0.3%: 0.3% foliar fertilization, VR: varying rates of foliar fertilization, C: control.

Table 1. P-value of ANOVA of root collar diameter, height, dry mass, and shoot/root ratio of red pine and black pine seedlings in various types of fertilization.

Variable	df	Root collar diameter	Height	Dry mass				Shoot/Root
				Foliage	Stem	Root	Total
Tree species (T)	1	0.985	0.727	0.878	0.214	0.011	0.850	<0.001
Fertilization (F)	3	<0.001	<0.001	<0.001	0.029	0.335	<0.001	<0.001
T × F	3	0.612	0.593	0.356	0.620	0.304	0.525	0.047

Figure 4. Carbon concentration of red pine and black pine seedlings at various types of fertilization. The same letter on each bar (mean ± S.E.) within each treatment indicates no significant difference according to Tukey's test at P = 0.05. PD: Pinus densiflora, PT: Pinus thunbergii, UF: slow release solid fertilization, 0.3%: 0.3% foliar fertilization, VR: varying rates of foliar fertilization, C: control.

Figure 5. Nitrogen concentration of red pine and black pine seedlings at various types of fertilization. The same letter on each bar (mean ± S.E.) within each treatment indicates no significant difference according to Tukey's test at P = 0.05. PD: Pinus densiflora, PT: Pinus thunbergii, UF: slow release solid fertilization, 0.3%: 0.3% foliar fertilization, VR: varying rates of foliar fertilization, C: control.

Figure 6. Nitrogen content of red pine and black pine seedlings at various types of fertilization. The same letter on each bar (mean ± S.E.) within each treatment indicates no significant difference according to Tukey's test at P = 0.05. PD: Pinus densiflora, PT: Pinus thunbergii, UF: slow release solid fertilization 0.3%: 0.3% foliar fertilization, VR: Varying rates of foliar fertilization, C: control.

Table 2. P-value of ANOVA of carbon and nitrogen response of red pine and black pine seedlings in various types of fertilization.

		Foliage			Stem			Root
		Concentration		Content	Concentration		Content	Concentration		Content
Variable	df	N	C	N	N	C	N	N	C	N
Tree species (T)	1	0.585	0.160	0.988	0.131	0.413	0.040	0.346	0.046	0.006
Fertilization (F)	3	0.001	0.172	<0.001	<0.001	0.127	<0.002	<0.002	0.062	0.023
T × F	3	0.834	0.960	0.315	0.144	0.261	0.424	0.235	0.064	0.136