Effects of N/P ratio and loading on growth and construction of nutrients reserves of one-year-old seedlings for five kinds of precious tree species

doi:10.3969/j.issn.1000-2006.201902007

JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2020, Vol. 44 ›› Issue (1): 72-80.doi: 10.3969/j.issn.1000-2006.201902007

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Effects of N/P ratio and loading on growth and construction of nutrients reserves of one-year-old seedlings for five kinds of precious tree species

LI Fengqing¹^,³(), WANG Xiuhua², CHU Xiuli¹^,^*(), ZHANG Dongbei², WU Xiaolin¹, ZHOU Shengcai², YE Ming⁴

1. Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Key Laboratory of Tree Breeding of Zhejiang Province, Hangzhou 311400, China
2. Experimental Forest Farm of Qingyuan Country, Zhejiang Province, Qingyuan 323800, China
3. Experimental Center of Subtropical Forestry, Chinese Academy of Forestry, Fenyi 336600,China
4. Forest Farm of Shouchang in Jiande City, Zhejiang Province, Jiande 311612, China

Received:2019-02-14 Revised:2019-04-28 Online:2020-02-08 Published:2020-02-02
Contact: CHU Xiuli E-mail:lfqnjfu@163.com;xiulic0207@163.com

Abstract

Abstract:

【Objective】 To provide scientific guidance for seedling cultivation in containers, the impacts of slow-release fertilizer (SRF) loading were observed for the growth, nitrogen (N) and phosphorus (P) uptake, and nutrient pool construction of five precious tree species, such as Phoebe chekiangensis. 【Method】 A 4 × 4 factorial experimental design was used to compare the impacts of the N/P mass ratio (1.75:1, 2.25:1, 2.75:1 and 3.25:1) and SRF loading levels (1.5, 2.5, 3.5 and 4.5 kg/m ³) on the growth and N and P nutrient pool construction of one-year-old seedlings.【Result】 Significant effects were detected in the growth and dry matter accumulation between N/P ratios, SRF loading, and their interaction. As the N/P ratio increased, the tree species responded differently. The largest growth and dry matter accumulation of the five precious tree species was detected with 3.5 kg/m³ SRF loading. The N concentration in the leaves of P. chekiangensis, Cinnamomum chekiangense and Schima superba was correlated with the N/P ratio, but there was no difference in the leaf N concentration of Taxus wallichiana and Cyclobalan gilvain. The P concentration in the leaves of all species, except for P. chekiangensis, also significantly differed with varying N/P ratios. However, the N and P accumulation in the leaves of all species were not sensitive to the N/P ratio. The effect of the SRF loading on the nutrient accumulations was more obvious than the N/P ratios; the concentration and accumulation of leaf N and P were highest with 3.5 kg/m³ SRF loading. Changes in the N and P concentrations in the organs of the different species were similar, indicating N/P absorption synchrony, whilst the distribution of N and P among the organs was species-specific. 【Conclusion】 Based on the growth characteristics of the different tree species, seedlings of P. chekiangensis should be loaded with higher N content fertilizer, and the seedlings of Cinnamomum chekiangense, Cyclobalan gilva and S. superba should be loaded with higher P content fertilizer. T. wallichiana seedlings are not sensitive to the N/P ratio, but nutrition construction suggests that it is N/P ratio and adding appropriate amounts of SRF (3.5 kg/m³).

Key words: Phoebe chekiangensis, Cinnamomum chekiangense, Taxus wallichiana var. mairei, Cyclobalanopsis gilva, Schima superba, container seedling, N/P ratio, slow-release fertilizer loading, nutrient pool

CLC Number:

S722

LI Fengqing, WANG Xiuhua, CHU Xiuli, ZHANG Dongbei, WU Xiaolin, ZHOU Shengcai, YE Ming. Effects of N/P ratio and loading on growth and construction of nutrients reserves of one-year-old seedlings for five kinds of precious tree species[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY, 2020, 44(1): 72-80.

Figures/Tables 6

Fig.1

Table 1

Effects of N / P ratio and loadings of slow-release fertilizer on N content in organs of one-year-old container seedlings of five precious tree speciesmg/g"

树种 species	器官 organs	N/P(A)				加载量(F) loading force
树种 species	器官 organs	A1	A2	A3	A4	F1	F2	F3	F4
浙江楠 P. chekiangensis	根 root	13.51±1.45	14.46±1.44	15.23±2.41	14.78±1.52	13.64±0.99	15.24±1.72	14.65±2.33	14.42±1.78
	茎 stem	2.91±0.45	3.03±0.66	3.17±0.52	3.29±0.32	2.89±0.72	3.04±0.27	3.28±0.40	3.19±0.49
	叶 leaf	8.49±1.50 b	8.43±1.19 b	8.81±1.54 b	10.15±1.25 a	7.44±1.29 C	8.58±0.99 B	9.78±0.75 A	10.07±1.32 A
浙江樟 Cinnamomum chekiangense	根 root	12.40±1.93 B	13.11±0.80 A	11.11±1.00 C	12.81±1.64 AB	11.37±1.02 B	12.53±1.06 AB	13.45±1.57 A	12.06±1.86 B
	茎 stem	3.02±0.36	2.76±0.48	3.28±0.31	2.91±0.39	2.67±0.34 C	2.87±0.33 BC	3.09±0.48 AB	3.34±0.24 A
	叶 leaf	9.41±0.54 ab	10.02±0.87 a	9.78±1.12 ab	9.27±0.99 b	9.04±0.44 b	9.53±0.74 ab	10.19±0.68 a	9.71±1.32 ab
南方红豆杉 T. wallichiana var. mairei	根 root	7.05±1.47 C	9.98±0.97 B	11.51±1.66 A	10.59±1.48 AB	8.48±1.23 b	9.69±1.23 ab	10.98±1.34 a	9.98±1.59 ab
	茎 stem	3.94±0.69	3.89±0.67	3.84±0.74	3.49±0.33	4.43±0.77 A	3.79±0.39 B	3.66±0.29 BC	3.28±0.37 C
	叶 leaf	9.66±1.07	10.00±0.87	10.44±1.10	10.67±0.93	10.06±1.25	9.59±0.83	10.65±1.21	10.46±1.09
赤皮青冈 Cyclobalanopsis gilva	根 root	8.52±0.62	9.35±1.43	9.72±1.56	8.55±1.23	9.06±1.13	9.44±1.59	9.13±1.17	8.51±1.37
	茎 stem	3.18±0.55	3.14±0.37	2.97±0.26	3.18±0.45	3.14±0.63	3.17±0.29	3.05±0.20	3.11±0.47
	叶 leaf	11.21±0.99	10.70±1.04	11.76±1.04	10.84±1.06	10.89±1.14	11.01±0.88	11.44±0.89	11.18±1.39
木荷 S.superba	根 root	7.17±0.86 B	6.47±1.23 BC	8.04±0.68 A	6.36±0.77 C	6.67±1.53 b	6.68±1.05 b	7.42±1.06 a	7.28±0.71 ab
	茎 stem	2.23±0.45	2.32±0.55	1.92±0.27	2.10±0.33	2.05±0.29 b	2.20±0.22 ab	2.43±0.60 a	1.89±0.34 b
	叶 leaf	7.72±1.02 A	6.45±1.02 B	6.39±0.89 B	6.99±0.82 B	6.11±0.70 B	6.55±0.78 B	7.40±1.07 A	7.49±0.78 A

Table 1

Table 2

The effect of slow-release fertilizer(SLF) N/P ratio and loading on N accumulation of one-year-old seedling for five speciesg/株"

树种 species	器官 organs	N/P				加载量 loading force
树种 species	器官 organs	A1	A2	A3	A4	F1	F2	F3	F4
浙江楠 P.chekiangensis	叶 leaf	14.64±3.32	14.4±3.21	14.62±5.07	16.44±3.34	10.17±1.95 d	13.86±1.73 c	18.8±1.79 a	17.27±1.70 b
	茎 stem	3.89±1.14	4.00±1.39	3.98±0.85	4.18±1.23	2.82±0.68 d	3.66±0.29 c	5.26±0.70 a	4.32±0.99 b
	根 root	15.43±1.58	16.39±2.36	16.42±4.18	15.39±2.58	14.12±1.30 c	16.41±1.81 ab	17.92±3.25 a	15.19±3.00 bc
浙江樟 Cinnamomun chekiangense	叶 leaf	13.19±2.29	13.7±2.66	11.03±2.26	12.22±3.59	9.8±1.33 d	12.94±1.69 b	16.19±1.76 a	11.21±1.51 c
	茎 stem	2.48±0.54	2.21±0.42	2.14±0.45	2.21±0.58	1.65±0.20 d	2.41±0.27 b	2.82±0.39 a	2.15±0.20 c
	根 root	17.54±3.70	18.76±2.27	16.64±1.71	16.85±3.72	14.18±2.35 b	17.87±2.87 a	19.41±3.87 a	14.34±2.77 b
南方红豆杉 T.wallichiana var. mairei	叶 leaf	6.86±1.80	7.21±1.85	6.94±1.96	7.12±1.94	5.14±0.58 d	6.27±0.78 c	9.67±0.89 a	7.05±0.68 b
	茎 stem	2.18±0.38	2.04±0.33	1.98±0.49	1.81±0.48	1.8±0.35b	1.91±0.31 b	2.59±0.24 a	1.71±0.14 b
	根 root	5.68±2.04 b	8.58±1.79 a	9.01±2.72 a	8.08±1.91 a	5.47±0.77 c	7.45±1.98 b	10.54±1.67 a	7.9±2.02b
赤皮青冈 Cyclobalanopsis gilva	叶 leaf	7.83±1.43	8.73±1.87	8.17±0.87	8.96±1.10	7.32±1.01	7.74±0.63	9.89±0.97	8.72±1.32
	茎 stem	1.90±0.45	2.29±0.38	1.93±0.21	2.39±0.31	1.84±0.40	1.95±0.24	2.48±0.40	2.23±0.18
	根 root	11.1±2.79	11.21±2.09	12.01±2.61	10.74±1.59	9.97±1.49	11.42±2.97	12.43±2.2	11.23±1.79
木荷 S.superba	叶 leaf	16.04±2.64	14.62±2.96	15.38±3.71	15.24±2.85	12.23±1.91 c	13.81±1.26 b	17.35±2.50 a	17.9±1.60 a
	茎 stem	4.29±1.40	4.95±1.72	4.12±0.99	4.34±0.7	3.13±0.47 c	4.41±0.51 b	5.81±1.39 a	4.35±0.70 b
	根 root	10.29±2.12 b	9.80±2.55 b	12.27±1.83 a	9.17±1.44 b	9.44±2.76	9.95±2.33	11.06±1.50	11.08±2.19

Table 2

Fig.2

Fig.3

Table 3

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树种 species	因素 factor	苗高 seedling height	地径 ground diameter	干物质质量 dry mass	N浓度 N concentration	N累积量 N accumulation	P浓度 P concentration	P累积量 P accumulation
浙江楠 P.chekiangensis	A	7.24^**	9.92^**	0.70	11.70^**	2.37	3.597^*	74.35^**
	F	181.6^**	53.03^**	15.76^**	9.47^**	128.92^**	11.24^**	285.51^**
	A×F	13.21^**	4.77^**	0.89	3.11	10.91^**	4.36^**	24.66^**
浙江樟 Cinnamomum chekiangense	A	30.96^**	12.82^**	12.16^**	4.39^*	52.46^**	2.17	35.96^**
	F	27.13^**	7.71^**	25.85^**	8.40^**	115.66^**	157.3^**	4.58^**
	A×F	5.63^**	5.39^**	1.42	1.56	5.33^**	11.73^**	3.35^*
南方红豆杉 T.wallichiana var. mairei	A	1.43	2.86	1.08	23.04^**	14.61^**	0.63	9.36^**
	F	62.95^**	28.12^**	31.78^**	4.50^*	124.24^**	6.98^**	85.06^**
	A×F	11.65^**	8.03^**	0.75	1.33	2.86^*	4.83^**	14.96^**
赤皮青冈 Cyclobalanopsis gilva	A	30.56^**	34.48^**	2.53	5.42^**	1.95	38.41^**	16.91^**
	F	21.27^**	7.88^**	5.60^**	4.33^*	25.28^**	51.32^**	32.37^**
	A×F	5.39^*	1.74	1.23	2.49	8.25^**	13.01^**	30.04^**
木荷 S.superba	A	16.32^**	4.47^**	2.21	10.36^**	5.40^*	57.35^**	24.04^**
	F	160.62^**	51.66^**	10.69^**	5.65^**	59.15^**	52.03^**	119.13^**
	A×F	10.75^**	3.70^**	1.21	1.60	7.89^**	17.48^**	37.04^**

Effects of N/P ratio and loading on growth and construction of nutrients reserves of one-year-old seedlings for five kinds of precious tree species

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