江西武夷山南方铁杉林主要树种叶片养分含量及再吸收效率

doi:10.11707/j.1001-7488.20220102

Abstract

Abstract:

Objective: Contents of leaf nutrients of the main tree species in Tsuga chinensis forest were investigated to illustrate stoichiometric characteristics and resorption efficiency of nutrients of fresh and litter leaves of tree species with different life forms (deciduous and evergreen tree species), in order to reveal their responses to the different life forms. Method: The fresh and litter leaves of main tree species were collected in T. chinensis natural forest. The contents of carbon(C), nitrogen(N) and phosphorus(P) in leaves were determined, and their stoichiometric ratio and nutrient resorption efficiency were calculated. The standardized major axis estimation(SMA) method was used to study the allometric relationship among the fresh leaves of the main tree species in the T. chinensis forest. The effects of different life forms on the relationship between N and P contents in leaves were analyzed. Result: There was no significant difference in fresh leaf C content between deciduous and evergreen tree species, but the N, and P content of deciduous tree species was significantly higher than that of evergreen tree species (P < 0.05). there was no significant difference in the contents of C, N and P in litter leaves between the two life-forms in the natural mixed forest of T. chinensis in Wuyi Mountain. the C∶N and C∶P of fresh leaves in deciduous species was significantly lower than that of fresh leaves in evergreen species (P < 0.05), but their N: P was not different between the two life-types, C ∶N, N ∶P, and C ∶P of litter leaves were all significantly larger than that of the fresh leaves, but there was no difference between the two different life forms. There was a significant positive correlation between the N and P contents in the fresh leaves of evergreen tree species and a significant positive correlation of the N and P contents in the litter leaves between evergreen and deciduous tree species(P < 0.05), but the slope of the correlation function was not significant (P = 0.60), with a value of 0.73, and the N content of the litter leaves was positively correlated with that of the fresh leaves, but the P content not. There was no significant difference in leaf N and P resorption efficiency between deciduous and evergreen tree species, and both had a higher P resorption efficiency. Conclusion: The contents of N and P in fresh leaves was significantly higher of deciduous than evergreen tree species. No significant differences in N and P nutrient resorption efficiency were found between the two different life forms. Life form has no effect on the slope of N and P correlation in the leaf litter between evergreen and deciduous tree species. There are significant differences in leaf nutrient contents between different life forms, different nutrient acquisition strategies exist for different life forms.

Key words: carbon, nitrogen, phosphorus, subtropical forest, Tsuga Chinensis, major tree species, nutrient resorption efficiency

CLC Number:

S154.5

Panpan Wu,Lijian Zeng,Ping Lei,Dandan Hu,Jinlong Li,Mantang Wang,Quanlin Zhong. Content of Leaf Nutrients and Resorption Efficiency of Major Tree Species in Tsuga chinensis Forest in Wuyi Mountain, Jiangxi Province[J]. Scientia Silvae Sinicae, 2022, 58(1): 12-21.

Figures/Tables 5

Table 1

Table 2

Leaf nutrient content of main tree species in T. chinensis forest in Wuyi Mountain mg ·g-1"

	项目Item	新鲜叶Fresh leaves			凋落叶Litter leaves
	项目Item	C	N	P	C	N	P
落叶树种 Deciduous tree species	天目紫茎Stewartia gemmata	457.25±6.23	17.15±1.06	0.87±0.05	444.00±2.17	8.70±0.45	0.34±0.02
	贵定桤叶树Clethra cavaleriei	463.15±8.09	19.58±2.35	0.97±0.08	465.18±1.64	11.68±0.36	0.28±0.04
	鸡爪槭Acer palmatum	471.18±11.48	19.10±1.44	0.99±0.13	465.32±5.30	10.03±0.60	0.28±0.03
	白蜡树Fraxinus chinensis	480.71±3.53	21.10±0.77	1.24±0.05	484.22±1.80	20.46±0.03	1.22±0.09
	豆梨Pyrus calleryana	477.75±4.50	17.32±2.09	0.93±0.13	470.05±4.44	10.44±1.25	0.52±0.07
	青榨槭Acer davidii	470.70±4.46	18.01±2.13	1.23±0.09	465.38±0.79	5.96±0.33	0.20±0.04
	白檀Symplocos paniculata	472.62±6.09	21.29±3.23	0.98±0.08	475.26±0.80	17.46±0.40	0.72±0.1

常绿树种 Evergreen tree species	青冈Cyclobalanopsis glauca	484.83±9.99	17.04±2.93	0.73±0.11	494.61±10.3	15.57±0.18	0.64±0.04
	岩柃Eurya saxicola	459.55±4.26	12.66±0.93	0.53±0.05	446.39±0.24	5.83±0.07	0.21±0.09
	闵皖八角Illicium minwanense	488.30±10.96	17.81±1.26	1.07±0.11	503.26±5.87	13.97±2.42	0.69±0.32
	多脉青冈Cyclobalanopsis multinervis	501.92±6.34	21.32±2.34	1.09±0.18	500.81±1.8	15.65±2.48	0.49±0.06
	云锦杜鹃Rhododendron fortunei	482.71±4.32	13.02±1.67	0.73±0.08	472.84±7.91	11.08±1.13	0.67±0.05
	南方铁杉Tsuga chinensis	488.59±7.19	13.34±1.27	0.64±0.06	493.16±0.85	12.23±0.73	0.58±0.02
	鹿角杜鹃Rhododendron latoucheae	470.90±4.48	10.04±1.18	0.52±0.09	475.08±0.10	4.88±0.25	0.15±0.02
落叶树种均值 Mean value of deciduous tree specie		470.48±8.08a	19.08±1.69a	1.03±0.15a	467.06±12.33a	12.11±5.08a	0.51±0.36a
常绿树种均值 Mean value of evergreen tree species		482.40±12.62a	15.03±3.56b	0.75±0.22b	483.73±18.78a	11.31±4.08a	0.51±0.22a
总均值 Mean value of all tree specie		476.44±12.41A	17.05±3.54A	0.89±0.24A	475.40±18.30B	11.71±4.59B	0.49±0.30A

Table 2

Table 3

stoichiometric ratio of main tree species in T chinensis forest in Wuyi Mountain mg ·g-1"

	项目Item	新鲜叶Fresh leaves			凋落叶Litter leaves
	项目Item	C∶N	C∶P	N∶P	C∶N	C∶P	N∶P
落叶树种 Deciduous tree species	天目紫茎Stewartia gemmata	26.80±2.08	527.93±40.70	19.72±0.76	51.16±2.47	1 297.41±71.16	25.35±0.43
	贵定桤叶树Clethra cavaleriei	23.98±2.67	478.75±32.29	20.23±2.71	39.85±1.05	1 683.51±246.52	42.24±5.98
	鸡爪槭Acer palmatum	24.83±2.33	484.27±81.21	19.43±1.90	46.57±2.97	1 704.75±198.52	37.02±6.53
	白蜡树Fraxinus chinensis	22.81±0.72	388.39±18.03	17.06±1.16	23.66±0.12	399.72±30.04	16.90±1.32
	豆梨Pyrus calleryana	27.99±3.32	525.06±75.51	18.82±1.99	45.59±4.95	916.54±119.46	20.07±0.83
	青榨槭Acer davidii	26.46±2.75	384.16±23.99	14.62±1.18	78.30±4.17	2 361.74±427.33	30.38±6.41
	白檀Symplocos paniculata	22.67±3.12	486.12±42.30	21.90±3.77	27.24±0.66	674.71±88.65	24.75±3.06

常绿树种 Evergreen tree species	青冈Cyclobalanopsis glauca	29.39±5.44	674.24±96.70	23.33±3.50	31.78±0.89	773.21±31.62	24.37±1.75
	岩柃Eurya saxicola	36.51±2.92	875.65±83.08	24.21±3.42	76.61±0.87	2 750.02±1561.8	36.13±20.96
	闵皖八角Illicium minwanense	27.57±2.20	459.38±43.40	16.82±2.52	36.98±5.47	865.24±303.02	24.38±10.26
	多脉青冈Cyclobalanopsis multinervis	23.82±2.53	472.85±76.54	20.36±5.41	32.86±5.37	1 040.12±124.57	32.42±6.45
	云锦杜鹃Rhododendron fortunei	37.70±4.91	685.33±80.19	18.63±4.32	43.24±5.45	722.92±16.48	16.94±2.11
	南方铁杉Tsuga chinensis	37.01±3.91	768.59±72.38	20.87±1.79	40.46±2.39	848.77±27.68	21.08±1.77
	鹿角杜鹃Rhododendron latoucheae	47.46±4.63	939.25±174.09	20.20±5.23	97.65±5.10	3 217.18±334.94	32.87±2.01
落叶树种均值 Mean value of deciduous tree species		25.08±1.91b	467.81±54.67b	18.82±2.18a	44.63±16.67a	1 291.20±630.89a	28.10±8.40a
常绿树种均值 Mean value of evergreen tree species		34.21±7.33a	696.47±195.09a	20.63±4.51a	51.37±23.60a	1 440.05±1 212.1a	27.47±11.74a
总均值 Mean value of all tree species		29.64±7.04B	582.14±185.61B	19.73±3.94B	48.00±20.71A	1 361.90±967.31A	27.80±10.60A

Table 3

Fig.1

Fig.2

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生活型 Life form	树种 Tree species	密度 Density/hm^-2	平均胸径(地径) Mean DBH (ground diameter)/cm	平均树高 Mean tree height/m
落叶Deciduous	天目紫茎Stewartia gemmata	175	12.13±9.29	8.45±4.46
	贵定桤叶树Clethra cavaleriei	275	5.39±2.85	4.96±1.83
	鸡爪槭Acer palmatum	67	21.11±7.98	11.12±4.18
	白蜡树Fraxinus chinensis	42	8.75±6.51	6.99±3.92
	豆梨Pyrus calleryana	58	9.13±4.56	5.35±2.43
	青榨槭Acer davidii	33	11.44±9.98	3.96±0.92
	白檀Symplocos paniculata	308	7.81±4.53	5.88±2.29

常绿Evergreen	青冈Cyclobalanopsis glauca	200	19.42±14.24	8.25±4.03
	岩柃Eurya saxicola	342	4.79±2.50	4.42±1.43
	闵皖八角Illicium minwanense	533	6.86±4.76	5.56±2.80
	多脉青冈Cyclobalanopsis multinervis	183	19.06±13.20	9.61±4.86
	云锦杜鹃Rhododendron fortunei	83	11.70±6.26	6.95±2.54
	南方铁杉Tsuga chinensis	283	32.58±21.40	16.52±8.46
	鹿角杜鹃Rhododendron latoucheae	167	5.53±3.74	4.90±1.72

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Content of Leaf Nutrients and Resorption Efficiency of Major Tree Species in Tsuga chinensis Forest in Wuyi Mountain, Jiangxi Province

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