Leaf Stoichiometric Characteristics of Japanese Red Pine Forest in Shandong Province and Their Correlation with Stand Characteristics and Soil Nutrients

doi:10.11924/j.issn.1000-6850.casb2021-0772

Abstract

Abstract:

Pinus densiflora is one of the important native tree species in Shandong Province. The stoichiometric characteristics of carbon (C), nitrogen (N) and phosphorus (P) in leaves of P. densiflora in Shandong Province and their relationship with stand characteristics and soil nutrients were investigated to assess health status of plantations of P. densiflora and carry out fertilization management. From August to September in 2018, we conducted stand growth surveys on 20 plantations of P. densiflora in Shandong Province, and collected leaf and soil (0-20 cm) samples. Leaf stoichiometric characteristics, stand characteristics and soil nutrients' contents, as well as their relationships were analyzed. The results showed that the average content of C, N and P in the leaves of P. densiflora was 636.35, 12.80 and 0.82 g/kg, respectively, and the average value of C:N, C:P and N:P was 50.74, 800.48 and 15.93, respectively. It was found that the leaf N content was significantly and positively correlated with diameter at breast height and forest age, and significantly and negatively correlated with stand density. However, leaf C:N showed a negative correlation with forest age. Moreover, leaf C content and C:P showed significantly negative linear dependence upon the contents of soil organic matter and soil alkali-hydrolyzed N. In addition, leaf N content was significantly and positively correlated with soil nutrients' contents, whereas leaf C:N was significantly and negatively correlated with soil nutrients' contents. The leaf N content of P. densiflora was significantly and linearly correlated with stand characteristics and soil nutrients. Furthermore, P was a restrictive factor for P. densiflora in Shandong Province during its growth and development.

Key words: stoichiometry, C, N and P, soil nutrient, stand characteristics, Pinus densiflora, leaf

CLC Number:

S723.1

LI Zongtai, ZHAN Lijie, LIANG Yan, GE Zhongqiang, CAO Zhenfei, DU Zhenyu, DUN Xingjian. Leaf Stoichiometric Characteristics of Japanese Red Pine Forest in Shandong Province and Their Correlation with Stand Characteristics and Soil Nutrients[J]. Chinese Agricultural Science Bulletin, 2022, 38(22): 20-30.

Figures/Tables 5

References 33

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编号	位置	树高/m	胸径/cm	冠幅/m	密度/(株/hm²)	林龄/年	郁闭度	坡度/°	海拔/m
1	日照驻龙山	4.30	9.30	2.16	2900	20	0.70	30	65
2	日照驻龙山	4.61	9.99	3.08	2400	20	0.70	20	40
3	日照驻龙山	4.32	12.13	2.49	1300	20	0.30	18	130
4	日照驻龙山	4.18	9.52	2.68	2300	20	0.75	11	70
5	烟台昆嵛山林场	12.31	25.35	4.99	500	65	0.70	35	150
6	烟台昆嵛山林场	11.26	17.55	4.63	900	65	0.85	30	120
7	烟台昆嵛山林场	7.85	9.58	2.85	2900	65	0.90	10	150
8	烟台曲村林场	3.36	6.08	2.75	2600	22	0.50	23	161
9	烟台曲村林场	4.59	7.82	2.40	3000	22	0.90	18	142
10	烟台曲村林场	4.30	6.61	1.92	4800	20	0.70	20	140
11	烟台风云林场	3.87	6.84	1.93	3700	16	0.70	21	170
12	烟台风云林场	4.32	10.14	3.24	2000	16	0.50	24	166
13	烟台神童村林场	5.41	8.53	2.23	2300	16	0.50	32	126
14	烟台神童村林场	5.09	6.70	2.59	2300	16	0.80	30	130
15	淄博毫山林场	9.86	22.90	4.34	575	56	0.40	45	490
16	淄博毫山林场	7.97	24.56	4.60	900	56	0.50	30	530
17	淄博毫山林场	5.37	14.92	3.06	1200	56	0.65	30	570
18	淄博毫山林场	4.83	14.83	2.98	1200	56	0.55	22	700
19	淄博毫山林场	5.57	11.31	2.44	1800	56	0.80	26	710
20	淄博毫山林场	5.31	11.83	3.05	1200	56	0.85	28	720

编号	位置	树高/m	胸径/cm	冠幅/m	密度/(株/hm²)	林龄/年	郁闭度	坡度/°	海拔/m
1	日照驻龙山	4.30	9.30	2.16	2900	20	0.70	30	65
2	日照驻龙山	4.61	9.99	3.08	2400	20	0.70	20	40
3	日照驻龙山	4.32	12.13	2.49	1300	20	0.30	18	130
4	日照驻龙山	4.18	9.52	2.68	2300	20	0.75	11	70
5	烟台昆嵛山林场	12.31	25.35	4.99	500	65	0.70	35	150
6	烟台昆嵛山林场	11.26	17.55	4.63	900	65	0.85	30	120
7	烟台昆嵛山林场	7.85	9.58	2.85	2900	65	0.90	10	150
8	烟台曲村林场	3.36	6.08	2.75	2600	22	0.50	23	161
9	烟台曲村林场	4.59	7.82	2.40	3000	22	0.90	18	142
10	烟台曲村林场	4.30	6.61	1.92	4800	20	0.70	20	140
11	烟台风云林场	3.87	6.84	1.93	3700	16	0.70	21	170
12	烟台风云林场	4.32	10.14	3.24	2000	16	0.50	24	166
13	烟台神童村林场	5.41	8.53	2.23	2300	16	0.50	32	126
14	烟台神童村林场	5.09	6.70	2.59	2300	16	0.80	30	130
15	淄博毫山林场	9.86	22.90	4.34	575	56	0.40	45	490
16	淄博毫山林场	7.97	24.56	4.60	900	56	0.50	30	530
17	淄博毫山林场	5.37	14.92	3.06	1200	56	0.65	30	570
18	淄博毫山林场	4.83	14.83	2.98	1200	56	0.55	22	700
19	淄博毫山林场	5.57	11.31	2.44	1800	56	0.80	26	710
20	淄博毫山林场	5.31	11.83	3.05	1200	56	0.85	28	720

参数	叶片碳含量/ (g/kg)	叶片氮含量/ (g/kg)	叶片磷含量/ (g/kg)	叶片C:N	叶片C:P	叶片N:P	土壤碱解氮含量/ (mg/kg)	土壤有效磷含量/ (mg/kg)	土壤有机质含量/ (g/kg)
平均值	636.35	12.80	0.82	50.74	800.48	15.93	116.44	2.53	31.35
最小值	555.00	8.96	0.52	38.27	598.94	11.58	55.50	0.70	12.30
最大值	689.00	16.48	1.08	72.77	1267.31	21.44	256.00	5.50	71.20
标准偏差	41.96	1.69	0.13	8.65	159.87	2.70	51.02	1.38	16.50
变异系数/%	6.59	13.23	16.33	17.05	19.97	16.93	43.82	54.68	52.64

参数	叶片碳含量/ (g/kg)	叶片氮含量/ (g/kg)	叶片磷含量/ (g/kg)	叶片C:N	叶片C:P	叶片N:P	土壤碱解氮含量/ (mg/kg)	土壤有效磷含量/ (mg/kg)	土壤有机质含量/ (g/kg)
平均值	636.35	12.80	0.82	50.74	800.48	15.93	116.44	2.53	31.35
最小值	555.00	8.96	0.52	38.27	598.94	11.58	55.50	0.70	12.30
最大值	689.00	16.48	1.08	72.77	1267.31	21.44	256.00	5.50	71.20
标准偏差	41.96	1.69	0.13	8.65	159.87	2.70	51.02	1.38	16.50
变异系数/%	6.59	13.23	16.33	17.05	19.97	16.93	43.82	54.68	52.64